TOHOKU UNIVERSITY Researchers

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Kouki Hikosaka

Section

Graduate School of Life Sciences

Job title

Professor

Degree

博士（理学）（東京大学）

researchmap

https://researchmap.jp/read0184548

J-GLOBAL ID

200901088873239797

e-Rad No.

10272006

ORCID

https://orcid.org/0000-0003-1744-3775

Researcher ID

A-5415-2013

Education 2

The University of Tokyo　Graduate School, Division of Science　植物学専攻

- 1995/03
Tohoku University　Faculty of Science　生物学科

- 1990/03

Committee Memberships 22

Frontiers in Forests and Global Change　Associate Editor

2018/04 - Present
New Phytologist　Advisor

2016/04 - Present
Plant, Cell and Environment　Editorial board

2010/01 - Present
Oecologia　Editorial board

2006/08 - Present
日本光合成学会　幹事

2003/05 - Present
公益社団法人日本植物学会　理事

2023/03 - 2025/03
公益社団法人日本植物学会　代議員

2018/06 - 2024/06
一般社団法人日本生態学会　代議員

2021/12 - 2023/11
Journal of Plant Research　Editor-in-Chief

2017/03 - 2021/03
公益社団法人日本植物学会　理事

2017/03 - 2021/03
Journal of Plant Research　Editor

2013/01 - 2016/12
日本学術振興会科学研究費委員会　科学研究費委員会専門委員

2013/12 - 2014/11
公益社団法人日本植物学会　代議員

2012/06 - 2014/05
独立行政法人農業・食品産業技術総合研究機構　競争的資金事業に係る専門委員

2012/12 - 2013/03
Journal of Plant Research　Editorial board

2009/01 - 2012/12
日本植物学会　庶務担当理事

2009/01 - 2010/12
日本植物学会東北支部会　在仙幹事

2000/01 - 2010/12
Ecological Research　Editor

2005/08 - 2010/07
日本植物学会　ホームページ委員

2007/01 - 2008/12
独立行政法人大学入試センター教科科目第一委員会　委員

2006/04 - 2008/03
日本学術振興会科学研究費委員会　科学研究費委員会専門委員

2005/01 - 2005/12
日本生態学会東北地区会　地区委員兼庶務幹事

2006/10 -

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Professional Memberships 3

日本光合成学会
日本植物学会
日本生態学会

Research Interests 6

nitrogen use
acclimation
global change
environmental response
photosynthesis
Plant ecology

Research Areas 1

Life sciences / Ecology and environmental science / Plant ecophysiology

Awards 4

The ESJ Award

2020/03　Ecological Society of Japan
Ecological Research Award 2008

2008/03　日本生態学会
Journal of Plant Research Most-cited Paper Award

2007/09　（社）日本植物学会
日本植物学会奨励賞

2006/09　社団法人日本植物学会　窒素利用の観点からの光合成系順化の解析

Papers 178

Leaf economics of deciduous and evergreen plants: how do they exhibit trait optimization under resource variations and environmental constraints

Kouki Hikosaka, Yusuke Onoda, Kaoru Kitajima

Oecologia　2025/07

DOI： 10.1007/s00442-025-05734-z 　
Changes in subalpine moorland plant community diversity and trait composition in response to woody plant encroachment

Yuhi Orishikida, Yuki Iwachido, Yutaro Yoshitake, Akihito Goto, Daichi Makishima, Kouki Hikosaka, Takehiro Sasaki

Plant Ecology　2025/04/06
Publisher: Springer Science and Business Media LLC
DOI： 10.1007/s11258-025-01516-y 　

ISSN： 1385-0237

eISSN： 1573-5052
Winter leaf reddening and photoprotection accessed by vegetation indices and its influence on canopy light-use efficiency of a Japanese cypress (Chamaecyparis obtusa) forest

Siyu Chen, Yoshiko Kosugi, Linjie Jiao, Ayaka Sakabe, Daniel Epron, Tatsuro Nakaji, Hibiki Noda, Kouki Hikosaka, Kenlo Nishida Nasahara

Agricultural and Forest Meteorology　363　110427-110427　2025/03
Publisher: Elsevier BV
DOI： 10.1016/j.agrformet.2025.110427 　

ISSN： 0168-1923
An Intraspecific Negative Correlation Between the Repair Capacity of Photoinhibition of Cold Acclimated Plants and the Habitat Temperature

Riichi Oguchi, Soichiro Nagano, Ana Pfleger, Hiroshi Ozaki, Kouki Hikosaka, Barry Osmond, Wah Soon Chow

Plant, Cell & Environment　2025/03

DOI： 10.1111/pce.15270 　
The relationships between photochemical reflectance index (PRI) and photosynthetic status in radish species differing in salinity tolerance.

Elsayed Mohamed, Hajime Tomimatsu, Kouki Hikosaka

Journal of plant research　2025/01/24

DOI： 10.1007/s10265-025-01615-x 　

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Since photosynthesis is highly sensitive to salinity stress, remote sensing of photosynthetic status is useful for detecting salinity stress during the selection and breeding of salinity-tolerant plants. To do so, photochemical reflectance index (PRI) is a potential measure to detect conversion of the xanthophyll cycle in photosystem II. Raphanus sativus var. raphanistroides is a wild radish species closely related to domesticated radish, and is distributed throughout the coastal regions of Japan, where it is thought to be salt tolerant. In this study, we raised wild and domesticated radishes under various salt conditions and assessed growth, photosynthetic status, and PRI. When grown at mild salt stress (50 mM NaCl), wild radish leaves showed photosynthetic activity levels comparable to control plants, whereas the photosynthetic activity of domesticated radish was suppressed. This result suggests that wild radishes are more salt-tolerant than domesticated radishes. Although photosynthetic rate and the photochemical quantum yield were significantly correlated with PRI in both species, the PRI resolution was insufficient to distinguish differences in salt tolerance between wild and domesticated radish. Wild radish had a lower maximum quantum yield (Fv/Fm) when grown under moderate salt stress (200 mM NaCl), suggesting chronic photoinhibition. The relationship between non-photochemical quenching (NPQ) and PRI was significant when leaves with chronic photoinhibition were eliminated but this relationship was not significant when they were included. In contrast, the relationship between photosynthesis and PRI was significant regardless of whether leaves displayed chronic photoinhibition or not. We conclude that PRI is useful to detect relatively large reductions in photosynthetic rate under salinity stress, and that care should be taken to evaluate NPQ from PRI.
Na+-driven pH regulation by Na+/H+ antiporters promotes photosynthetic efficiency in cyanobacteria

Masaru Tsujii, Ayumu Kobayashi, Ayaka Kano, Kota Kera, Tomoko Takagi, Noriko Nagata, Seiji Kojima, Kouki Hikosaka, Riichi Oguchi, Kintake Sonoike, Chihiro Azai, Tomomi Inagaki, Yasuhiro Ishimaru, Nobuyuki Uozumi

Plant Physiology　2024/10/24
Publisher: Oxford University Press (OUP)
DOI： 10.1093/plphys/kiae562 　

ISSN： 0032-0889

eISSN： 1532-2548

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Abstract Photosynthetic organisms have developed mechanisms to regulate light reactions in response to varying light conditions. Photosynthetic electron transport leads to the formation of a ΔpH across the thylakoid membrane, which is crucial for regulating electron transport. However, other pH modulators remain to be identified, particularly in cyanobacteria. In this study, we evaluated the potential involvement of six Na+/H+ antiporters (NhaS1–NhaS6) in control of pH in the cyanobacterium Synechocystis sp. PCC 6803. Synechocystis showed a strong requirement for Na+ at high light intensities, with ΔnhaS1 and ΔnhaS2 strains unable to grow under high light conditions. We analyzed Na+ efflux–driven H+-uptake activities of NhaS1–NhaS6 in inverted membranes of Escherichia coli. Biological fractionation and immunoelectron microscopy revealed that NhaS1 localizes to both the plasma and thylakoid membranes while NhaS2 localizes to the plasma membrane. Measurement of photosynthesis activity indicated that NhaS2 promotes ATP production and electron transport from PQ to P700. Measurements of pH outside of the cells and in the cytoplasm suggested that both NhaS1 and NhaS2 are involved in plasma membrane–mediated light-dependent H+ uptake and cytoplasmic acidification. NhaS1 and NhaS2 were also found to prevent photoinhibition under high light treatment. These results indicate that H+ transport mediated by NhaS1 and NhaS2 plays a role in regulating intracellular pH and maintaining photosynthetic electron transport.
Hyperspectral image extraction to evaluate the photosynthetic and stress status of plants, using a photochemical reflectance index (PRI) Invited Peer-reviewed

Tetsu Ogawa, Maro Tamaki, Takae Usui, Kouki Hikosaka

Scientia Horticulturae　336　1-9　2024/10

DOI： 10.1016/j.scienta.2024.113349 　

ISSN： 0304-4238
A negative correlation between the rate coefficient of repair after photoinhibition of cold acclimated plants and the mean annual temperature of the habitats ofArabidopsis thalianaecotypes

Riichi Oguchi, Soichiro Nagano, Ana Pfleger, Hiroshi Ozaki, Kouki Hikosaka, Barry Osmond, Wah Soon Chow

2024/07/10

DOI： 10.1101/2024.07.07.602425 　
Correction of photochemical reflectance index (PRI) by optical indices to predict non-photochemical quenching (NPQ) across various species

Yukiko Nakamura, Katsuto Tsujimoto, Tetsu Ogawa, Hibiki M. Noda, Kouki Hikosaka

Remote Sensing of Environment　305　114062-114062　2024/05
Publisher: Elsevier BV
DOI： 10.1016/j.rse.2024.114062 　

ISSN： 0034-4257
Heterotic growth of hybrids of Arabidopsis thaliana is enhanced by elevated atmospheric CO2

Masako Mishio, Emi Sudo, Hiroshi Ozaki, Riichi Oguchi, Ryo Fujimoto, Nobuharu Fujii, Kouki Hikosaka

American Journal of Botany　2024/04

DOI： 10.1002/ajb2.16317 　
Away-range shifts in leaf function of a global invader: a case of resource reallocation?

Robert Griffin-Nolan, Lamine Bensaddek, Guillaume Decocq, Kouki Hikosaka, Thomas Kichey, Julie LeVonne, Masako Mishio, Jason Fridley

Biological Invasions　2024/02/17

DOI： 10.1007/s10530-024-03262-0 　

ISSN： 1387-3547 1573-1464
Effect of soil temperature change on soil nitrogen mineralization rate in the Hakkoda mountain range Peer-reviewed

Arai Takahisa, Fukuzawa Karibu, Kurokawa Hiroko, Hikosaka Kouki, Nakashizuka Tohru, Shibata Hideaki

JAPANESE JOURNAL OF ECOLOGY　74　(1)　1　2024
Publisher: The Ecological Society of Japan
DOI： 10.18960/seitai.74.1_1 　

ISSN： 0021-5007

eISSN： 2424-127X
Competitive asymmetry in a forest composed of a shade-tolerant species depends on gap formation

Masahiro Yamakawa, Yusuke Onoda, Hiroko Kurokawa, Michio Oguro, Tohru Nakashizuka, Kouki Hikosaka

Forest Ecology and Management　549　121442-121442　2023/12
Publisher: Elsevier BV
DOI： 10.1016/j.foreco.2023.121442 　

ISSN： 0378-1127
Greenhouse gases Observing SATellite 2 (GOSAT-2): mission overview

Ryoichi Imasu, Tsuneo Matsunaga, Masakatsu Nakajima, Yukio Yoshida, Kei Shiomi, Isamu Morino, Naoko Saitoh, Yosuke Niwa, Yu Someya, Yu Oishi, Makiko Hashimoto, Hibiki Noda, Kouki Hikosaka, Osamu Uchino, Shamil Maksyutov, Hiroshi Takagi, Haruma Ishida, Takashi Y. Nakajima, Teruyuki Nakajima, Chong Shi

Progress in Earth and Planetary Science　10　(1)　2023/07/03
Publisher: Springer Science and Business Media {LLC}
DOI： 10.1186/s40645-023-00562-2 　

ISSN： 2197-4284
Regional‐Scale Wilting Point Estimation Using Satellite SIF, Radiative‐Transfer Inversion, and Soil‐Vegetation‐Atmosphere Transfer Simulation: A Grassland Study

Tomoki Kiyono, H. M. Noda, Tomo'omi Kumagai, Haruki Oshio, Yukio YOSHIDA, Tsuneo Matsunaga, K. Hikosaka

Journal of Geophysical Research: Biogeosciences　128　(4)　2023/04
Publisher: American Geophysical Union ({AGU})
DOI： 10.1029/2022jg007074 　

ISSN： 2169-8953 2169-8961
Does selection occur at the intermediate zone of two insufficiently isolated populations? A whole-genome analysis along an altitudinal gradient

Naofumi Yoshida, Shin Ichi Morinaga, Takeshi Wakamiya, Yuu Ishii, Shosei Kubota, Kouki Hikosaka

Journal of Plant Research　136　(2)　183-199　2023/03

DOI： 10.1007/s10265-022-01429-1 　

ISSN： 0918-9440

eISSN： 1618-0860
Enhanced growth rate under elevated CO2 conditions was observed for transgenic lines of genes identified by intraspecific variation analyses in Arabidopsis thaliana

Riichi Oguchi, Kousuke Hanada, Minami Shimizu, Masako Mishio, Hiroshi Ozaki, Kouki Hikosaka

PLANT MOLECULAR BIOLOGY　110　(4-5)　333-345　2022/11

DOI： 10.1007/s11103-022-01265-w 　

ISSN： 0167-4412

eISSN： 1573-5028
Plant and microbial community composition jointly determine moorland multifunctionality Peer-reviewed

Takehiro Sasaki, Naohiro I. Ishii, Daichi Makishima, Rui Sutou, Akihito Goto, Yutaka Kawai, Hayami Taniguchi, Kunihiro Okano, Ayumi Matsuo, Alfred Lochner, Simone Cesarz, Yoshihisa Suyama, Kouki Hikosaka, Nico Eisenhauer

JOURNAL OF ECOLOGY　110　(10)　2507-2521　2022/10

DOI： 10.1111/1365-2745.13969 　

ISSN： 0022-0477

eISSN： 1365-2745
Predicting diversity changes in subalpine moorland ecosystems based on geometry of species distributions and realistic area loss Peer-reviewed

Daichi Makishima, Naohiro Ishii, Rui Sutoh, Akihito Goto, Yutaka Kawai, Hayami Taniguchi, Kei Uchida, Masaya Shimazaki, Tohru Nakashizuka, Yoshihisa Suyama, Kouki Hikosaka, Takehiro Sasaki

Journal of Vegetation Science　33　(5)　in press　2022/09

DOI： 10.1111/jvs.13150 　

ISSN： 1100-9233

eISSN： 1654-1103
Leaf density and chemical composition explain variation in leaf mass area with spectral composition among 11 widespread forbs in a common garden

Qing‐Wei Wang, Chenggang Liu, Thomas Matthew Robson, Kouki Hikosaka, Hiroko Kurokawa

Physiologia Plantarum　173　(3)　698-708　2021/08/08
Publisher: Wiley
DOI： 10.1111/ppl.13512 　

ISSN： 0031-9317

eISSN： 1399-3054
Corrected photochemical reflectance index (PRI) is an effective tool for detecting environmental stresses in agricultural crops under light conditions Invited Peer-reviewed

Kaori Kohzuma, Maro Tamaki, Kouki Hikosaka

JOURNAL OF PLANT RESEARCH　134　(4)　683-694　2021/06

DOI： 10.1007/s10265-021-01316-1 　

ISSN： 0918-9440

eISSN： 1618-0860
Imaging, screening and remote sensing of photosynthetic activity and stress responses

Kaori Kohzuma, Kintake Sonoike, Kouki Hikosaka

JOURNAL OF PLANT RESEARCH　134　(4)　649-651　2021/06

DOI： 10.1007/s10265-021-01324-1 　

ISSN： 0918-9440

eISSN： 1618-0860
Estimating leaf photosynthesis of C3 plants grown under different environments from pigment index, photochemical reflectance index, and chlorophyll fluorescence

Katsuto Tsujimoto, Kouki Hikosaka

Photosynthesis Research　148　(1-2)　33-46　2021/05/28
Publisher: Springer Science and Business Media {LLC}
DOI： 10.1007/s11120-021-00833-3 　

ISSN： 0166-8595

eISSN： 1573-5079
Linking remote sensing parameters to CO2 assimilation rates at a leaf scale Invited Peer-reviewed

Kouki Hikosaka, Katsuto Tsujimoto

JOURNAL OF PLANT RESEARCH　134　(4)　695-711　2021/05

DOI： 10.1007/s10265-021-01313-4 　

ISSN： 0918-9440

eISSN： 1618-0860
Plant size, environmental factors and functional traits jointly shape the stem radius growth rate in an evergreen coniferous species across ontogenetic stages Peer-reviewed

Zhili Liu, Kouki Hikosaka, Fengri Li, Liangjun Zhu, Guangze Jin

JOURNAL OF PLANT ECOLOGY　14　(2)　257-269　2021/04

DOI： 10.1093/jpe/rtaa093 　

ISSN： 1752-9921

eISSN： 1752-993X
Potential extinction debt due to habitat loss and fragmentation in subalpine moorland ecosystems Peer-reviewed

Daichi Makishima, Rui Sutou, Akihito Goto, Yutaka Kawai, Naohiro Ishii, Hayami Taniguchi, Kei Uchida, Masaya Shimazaki, Tohru Nakashizuka, Yoshihisa Suyama, Kouki Hikosaka, Takehiro Sasaki

PLANT ECOLOGY　222　(4)　445-457　2021/04

DOI： 10.1007/s11258-021-01118-4 　

ISSN： 1385-0237

eISSN： 1573-5052
Intraspecific variations in leaf traits, productivity and resource use efficiencies in the dominant species of subalpine evergreen coniferous and deciduous broad-leaved forests along the altitudinal gradient Peer-reviewed

Kouki Hikosaka, Hiroko Kurokawa, Takahisa Arai, Sakino Takayanagi, Hiroshi O. Tanaka, Soichiro Nagano, Tohru Nakashizuka

JOURNAL OF ECOLOGY　109　(4)　1804-1818　2021/04

DOI： 10.1111/1365-2745.13603 　

ISSN： 0022-0477

eISSN： 1365-2745
Dividing the pie: A quantitative review on plant density responses International-journal Peer-reviewed

Johannes A. Postma, Vera L. Hecht, Kouki Hikosaka, Eric A. Nord, Thijs L. Pons, Hendrik Poorter

PLANT CELL AND ENVIRONMENT　44　(4)　1072-1094　2021/04

DOI： 10.1111/pce.13968 　

ISSN： 0140-7791

eISSN： 1365-3040
With gratitude from the Editor-in-Chief of the Journal of Plant Research

Kouki Hikosaka

JOURNAL OF PLANT RESEARCH　134　(1)　1-2　2021/01

DOI： 10.1007/s10265-021-01252-0 　

ISSN： 0918-9440

eISSN： 1618-0860
Photosynthesis, chlorophyll fluorescence and photochemical reflectance index in photoinhibited leaves International-journal Peer-reviewed

Kouki Hikosaka

FUNCTIONAL PLANT BIOLOGY　48　(8)　815-826　2021

DOI： 10.1071/FP20365 　

ISSN： 1445-4408

eISSN： 1445-4416
The latitudinal and altitudinal variations in the biochemical mechanisms of temperature dependence of photosynthesis within Fallopia japonica Peer-reviewed

Satoshi Machino, Soichiro Nagano, Kouki Hikosaka

ENVIRONMENTAL AND EXPERIMENTAL BOTANY　181　104248-104248　2021/01

DOI： 10.1016/j.envexpbot.2020.104248 　

ISSN： 0098-8472

eISSN： 1873-7307
2020 Awards in the Journal of Plant Research.

Kouki Hikosaka

Journal of plant research　133　(5)　609-610　2020/09

DOI： 10.1007/s10265-020-01216-w 　
Temperature-related cline in the root mass fraction in East Asian wild radish along the Japanese archipelago. Peer-reviewed

Wataru Ishizuka, Kouki Hikosaka, Motomi Ito, Shin-Ichi Morinaga

Breeding science　70　(3)　321-330　2020/06

DOI： 10.1270/jsbbs.18201 　

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Wild plants with a wide distribution, including those exposed to a wide variety of environmental conditions, may have variations in key functional traits relevant for agricultural applications. The East Asian wild radish (Raphanus sativus var. raphanistroides) is an appropriate model plant because it is widely distributed and has outstanding sink capacity as well as two cultivars within the species. Multiple common garden trials with 14 populations and three testing sites were conducted across the Japanese archipelago to quantify variations in yield and allocation. Significant inter-population variations and interaction effects with testing sites were detected for the root and shoot mass and the root mass fraction (RMF). While the rank order of the population changed drastically among sites and the variance components of genetic effects were small in yield traits (2.4%-4.7%), RMF displayed a large genetic variance (23.2%) and was consistently higher in the northern populations at all sites. Analyses revealed that the mean temperature of growing season of the seed origin was the most prominent factor explaining variation in RMF, irrespective of the sites. We concluded that the trait of resource allocation had a temperature-related cline and plants in cooler climates could invest more resources into their roots.
Variations in leaf economics spectrum traits for an evergreen coniferous species: Tree size dominates over environment factors Peer-reviewed

Zhili Liu, Kouki Hikosaka, Fengri Li, Guangze Jin

FUNCTIONAL ECOLOGY　34　(2)　458-467　2020/02

DOI： 10.1111/1365-2435.13498 　

ISSN： 0269-8463

eISSN： 1365-2435
New Year's greetings 2020 from the Journal of Plant Research.

Kouki Hikosaka

Journal of plant research　133　(1)　1-2　2020/01

DOI： 10.1007/s10265-019-01155-1 　
Functional shifts in leaves of woody invaders of deciduous forests between their home and away ranges. International-journal Peer-reviewed

Kelsey A Martinez, Jason D Fridley, Riichi Oguchi, Masahiro Aiba, Kouki Hikosaka

Tree physiology　39　(9)　1551-1560　2019/09/01

DOI： 10.1093/treephys/tpz065 　

ISSN： 0829-318X
2019 Awards in the Journal of Plant Research.

Kouki Hikosaka

Journal of plant research　132　(4)　459-460　2019/07

DOI： 10.1007/s10265-019-01120-y 　
Limitation in the Photosynthetic Acclimation to High Temperature in Canopy Leaves of Quercus serrata Peer-reviewed

Daisuke P. Yamaguchi, Dai Mishima, Kozue Nakamura, Junji Sano, Tatsuro Nakaji, Tsutom Hiura, Kouki Hikosaka

FRONTIERS IN FORESTS AND GLOBAL CHANGE　2　19　2019/05

DOI： 10.3389/ffgc.2019.00019 　

eISSN： 2624-893X
Acclimation and adaptation components of the temperature dependence of plant photosynthesis at the global scale. International-journal Peer-reviewed

Dushan P Kumarathunge, Belinda E Medlyn, John E Drake, Mark G Tjoelker, Michael J Aspinwall, Michael Battaglia, Francisco J Cano, Kelsey R Carter, Molly A Cavaleri, Lucas A Cernusak, Jeffrey Q Chambers, Kristine Y Crous, Martin G De Kauwe, Dylan N Dillaway, Erwin Dreyer, David S Ellsworth, Oula Ghannoum, Qingmin Han, Kouki Hikosaka, Anna M Jensen, Jeff W G Kelly, Eric L Kruger, Lina M Mercado, Yusuke Onoda, Peter B Reich, Alistair Rogers, Martijn Slot, Nicholas G Smith, Lasse Tarvainen, David T Tissue, Henrique F Togashi, Edgard S Tribuzy, Johan Uddling, Angelica Vårhammar, Göran Wallin, Jeffrey M Warren, Danielle A Way

The New phytologist　222　(2)　768-784　2019/04

DOI： 10.1111/nph.15668 　

ISSN： 0028-646X
Plasticity of functional traits and optimality of biomass allocation in elevational ecotypes of Arabidopsis halleri grown at different soil nutrient availabilities. Peer-reviewed

Qing-Wei Wang, Maya Daumal, Soichiro Nagano, Naofumi Yoshida, Shin-Ichi Morinaga, Kouki Hikosaka

Journal of plant research　132　(2)　237-249　2019/03

DOI： 10.1007/s10265-019-01088-9 　

ISSN： 0918-9440

eISSN： 1618-0860
Modeling leaf CO2 assimilation and Photosystem II photochemistry from chlorophyll fluorescence and the photochemical reflectance index. International-journal Peer-reviewed

Kouki Hikosaka, Hibiki M Noda

Plant, cell & environment　42　(2)　730-739　2019/02

DOI： 10.1111/pce.13461 　

ISSN： 0140-7791
New year's greetings 2019 from the Journal of Plant Research.

Kouki Hikosaka

Journal of plant research　132　(1)　1-2　2019/01

DOI： 10.1007/s10265-019-01087-w 　
Dependence of functional traits related to growth rates and their CO2 response on multiple habitat climate factors across Arabidopsis thaliana populations. Peer-reviewed

Hiroshi Ozaki, Riichi Oguchi, Kouki Hikosaka

Journal of plant research　131　(6)　987-999　2018/11

DOI： 10.1007/s10265-018-1058-1 　

ISSN： 0918-9440
The role of biomass allocation between lamina and petioles in a game of light competition in a dense stand of an annual plant. International-journal Peer-reviewed

Kenta Yoshinaka, Hisae Nagashima, Yusuke Yanagita, Kouki Hikosaka

Annals of botany　121　(5)　1055-1064　2018/04/18

DOI： 10.1093/aob/mcy001 　

ISSN： 0305-7364

eISSN： 1095-8290
Physiological validation of photochemical reflectance index (PRI) as a photosynthetic parameter using Arabidopsis thaliana mutants International-journal Peer-reviewed

Kaori Kohzuma, Kouki Hikosaka

BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS　498　(1)　52-57　2018/03

DOI： 10.1016/j.bbrc.2018.02.192 　

ISSN： 0006-291X

eISSN： 1090-2104
Habitat filtering determines the functional niche occupancy of plant communities worldwide Peer-reviewed

Li, Yuanzhi, Shipley, Bill, Price, Jodi N., Dantas, Vinicius de L., Tamme, Riin, Westoby, Mark, Siefert, Andrew, Schamp, Brandon S., Spasojevic, Marko J., Jung, Vincent, Laughlin, Daniel C., Richardson, Sarah J., Le Bagousse-Pinguet, Yoann, Schob, Christian, Gazol, Antonio, Prentice, Honor C., Gross, Nicolas, Overton, Jake, Cianciaruso, Marcus V., Louault, Frederique, Kamiyama, Chiho, Nakashizuka, Tohru, Hikosaka, Kouki, Sasaki, Takehiro, Katabuchi, Masatoshi, Dussault, Cedric Frenette, Gaucherand, Stephanie, Chen, Ning, Vandewalle, Marie, Batalha, Marco Antonio

Journal of Ecology　106　(3)　1001-1009　2018

DOI： 10.1111/1365-2745.12802 　

ISSN： 0022-0477
The effect of interspecific variation in photosynthetic plasticity on 4-year growth rate and 8-year survival of understorey tree seedlings in response to gap formations in a cool-temperate deciduous forest. International-journal Peer-reviewed

Riichi Oguchi, Tsutom Hiura, Kouki Hikosaka

Tree physiology　37　(8)　1113-1127　2017/08/01

DOI： 10.1093/treephys/tpx042 　

ISSN： 0829-318X

eISSN： 1758-4469
Mutant selection in the self-incompatible plant radish (Raphanus sativus L. var. sativus) using two-step TILLING Peer-reviewed

Kaori Kohzuma, Motoko Chiba, Soichiro Nagano, Toyoaki Anai, Miki U. Ueda, Riichi Oguchi, Kazumasa Shirai, Kousuke Hanada, Kouki Hikosaka, Nobuharu Fujii

BREEDING SCIENCE　67　(3)　268-276　2017/06

DOI： 10.1270/jsbbs.16200 　

ISSN： 1344-7610

eISSN： 1347-3735
Physiological and structural tradeoffs underlying the leaf economics spectrum. International-journal Peer-reviewed

Yusuke Onoda, Ian J Wright, John R Evans, Kouki Hikosaka, Kaoru Kitajima, Ülo Niinemets, Hendrik Poorter, Tiina Tosens, Mark Westoby

The New phytologist　214　(4)　1447-1463　2017/06

DOI： 10.1111/nph.14496 　

ISSN： 0028-646X

eISSN： 1469-8137
Greetings from the new Editor-in-Chief.

Kouki Hikosaka

Journal of plant research　130　(3)　417-418　2017/05

DOI： 10.1007/s10265-017-0939-z 　
Decades-long effects of high CO2 concentration on soil nitrogen dynamics at a natural CO2 spring Peer-reviewed

Miki U. Ueda, Yusuke Onoda, Chiho Kamiyama, Kouki Hikosaka

ECOLOGICAL RESEARCH　32　(2)　215-225　2017/03

DOI： 10.1007/s11284-016-1432-1 　

ISSN： 0912-3814

eISSN： 1440-1703
Nitrogen Distribution in Leaf Canopies of High-Yielding Rice Cultivar Takanari Peer-reviewed

Muryono, Mukhammad, Chen, Charles P., Sakai, Hidemitsu, Tokida, Takeshi, Hasegawa, Toshihiro, Usui, Yasuhiro, Nakamura, Hirofumi, Hikosaka, Kouki

Crop Science　57　(4)　2080-2088　2017

DOI： 10.2135/cropsci2016.07.0589 　

ISSN： 0011-183X
Nitrogen resorption in senescing leaf blades of rice exposed to free-air CO2 enrichment (FACE) under different N fertilization levels Peer-reviewed

Oikawa, Shimpei, Ehara, Hitomi, Koyama, Mika, Hirose, Tadaki, Hikosaka, Kouki, Chen, Charles P., Nakamura, Hirofumi, Sakai, Hidemitsu, Tokida, Takeshi, Usui, Yasuhiro, Hasegawa, Toshihiro

Plant and Soil　418　(1-2)　231-240　2017

DOI： 10.1007/s11104-017-3280-3 　

ISSN： 0032-079X
Functional differentiation in UV-B-induced DNA damage and growth inhibition between highland and lowland ecotypes of two Arabidopsis species Peer-reviewed

Qing-Wei Wang, Soichiro Nagano, Hiroshi Ozaki, Shin-Ichi Morinaga, Jun Hidema, Kouki Hikosaka

ENVIRONMENTAL AND EXPERIMENTAL BOTANY　131　110-119　2016/11

DOI： 10.1016/j.envexpbot.2016.07.008 　

ISSN： 0098-8472

eISSN： 1873-7307
Effects of seasonal change and experimental warming on the temperature dependence of photosynthesis in the canopy leaves of Quercus serrata. International-journal Peer-reviewed

Daisuke P Yamaguchi, Tatsuro Nakaji, Tsutom Hiura, Kouki Hikosaka

Tree physiology　36　(10)　1283-1295　2016/10

DOI： 10.1093/treephys/tpw021 　

ISSN： 0829-318X

eISSN： 1758-4469
Ultraviolet-B-induced DNA damage and ultraviolet-B tolerance mechanisms in species with different functional groups coexisting in subalpine moorlands Peer-reviewed

Qing-Wei Wang, Chiho Kamiyama, Jun Hidema, Kouki Hikosaka

OECOLOGIA　181　(4)　1069-1082　2016/08

DOI： 10.1007/s00442-016-3644-z 　

ISSN： 0029-8549

eISSN： 1432-1939
Plant-plant interactions mediate the plastic and genotypic response of Plantago asiatica to CO2: an experiment with plant populations from naturally high CO2 areas Peer-reviewed

Marloes P. van Loon, Max Rietkerk, Stefan C. Dekker, Kouki Hikosaka, Miki U. Ueda, Niels P. R. Anten

ANNALS OF BOTANY　117　(7)　1197-1207　2016/06

DOI： 10.1093/aob/mcw064 　

ISSN： 0305-7364

eISSN： 1095-8290
Trait-Based Approaches for Understanding Species Niche, Coexistence, and Functional Diversity in Subalpine Moorlands Peer-reviewed

Kouki Hikosaka, Takehiro Sasaki, Chiho Kamiyama, Masatoshi Katabuchi, Shimpei Oikawa, Masaya Shimazaki, Hiroshi Kimura, Tohru Nakashizuka

Structure and Function of Mountain Ecosystems in Japan　17-40　2016/04/05
Canopy Photosynthesis: From Basics to Applications

Kouki Hikosaka

2016
Publisher: Springer Netherlands
DOI： 10.1007/978-94-017-7291-4 　

ISSN： 1572-0233 2215-0102
Which plant trait explains the variations in relative growth rate and its response to elevated carbon dioxide concentration among Arabidopsis thaliana ecotypes derived from a variety of habitats? Peer-reviewed

Oguchi, Riichi, Ozaki, Hiroshi, Hanada, Kousuke, Hikosaka, Kouki

Oecologia　180　(3)　865-876　2016

DOI： 10.1007/s00442-015-3479-z 　

ISSN： 0029-8549
A meta-analysis of leaf nitrogen distribution within plant canopies Peer-reviewed

Hikosaka, Kouki, Anten, Niels P. R., Borjigidai, Almaz, Kamiyama, Chiho, Sakai, Hidemitsu, Hasegawa, Toshihiro, Oikawa, Shimpei, Iio, Atsuhiro, Watanabe, Makoto, Koike, Takayoshi, Nishina, Kazuya, Ito, Akihiko

Annals of Botany　118　(2)　239-247　2016

DOI： 10.1093/aob/mcw099 　

ISSN： 0305-7364
Optimality of nitrogen distribution among leaves in plant canopies Peer-reviewed

Hikosaka, Kouki

Journal of Plant Research　129　(3)　299-311　2016

DOI： 10.1007/s10265-016-0824-1 　

ISSN： 0918-9440
A global meta-analysis of the relative extent of intraspecific trait variation in plant communities Peer-reviewed

Andrew Siefert, Cyrille Violle, Loic Chalmandrier, Cecile H. Albert, Adrien Taudiere, Alex Fajardo, Lonnie W. Aarssen, Christopher Baraloto, Marcos B. Carlucci, Marcus V. Cianciaruso, Vinicius de L. Dantas, Francesco de Bello, Leandro D. S. Duarte, Carlos R. Fonseca, Gregoire T. Freschet, Stephanie Gaucherand, Nicolas Gross, Kouki Hikosaka, Benjamin Jackson, Vincent Jung, Chiho Kamiyama, Masatoshi Katabuchi, Steven W. Kembel, Emilie Kichenin, Nathan J. B. Kraft, Anna Lagerstrom, Yoann Le Bagousse-Pinguet, Yuanzhi Li, Norman Mason, Julie Messier, Tohru Nakashizuka, Jacob McC Overton, Duane A. Peltzer, I. M. Perez-Ramos, Valerio D. Pillar, Honor C. Prentice, Sarah Richardson, Takehiro Sasaki, Brandon S. Schamp, Christian Schoeb, Bill Shipley, Maja Sundqvist, Martin T. Sykes, Marie Vandewalle, David A. Wardle

ECOLOGY LETTERS　18　(12)　1406-1419　2015/12

DOI： 10.1111/ele.12508 　

ISSN： 1461-023X

eISSN： 1461-0248
Correction: A Genome Scan for Genes Underlying Microgeographic-Scale Local Adaptation in a Wild Arabidopsis Species. International-journal Peer-reviewed

Kubota S, Iwasaki T, Hanada K, Nagano AJ, Fujiyama A, Toyoda A, Sugano S, Suzuki Y, Hikosaka K, Ito M, Morinaga SI

PLoS genetics　11　(9)　e1005488　2015/09

DOI： 10.1371/journal.pgen.1005488 　

ISSN： 1553-7390
Optimal stomatal behaviour around the world Peer-reviewed

Yan-Shih Lin, Belinda E. Medlyn, Remko A. Duursma, I. Colin Prentice, Han Wang, Sofia Baig, Derek Eamus, Victor Resco de Dios, Patrick Mitchell, David S. Ellsworth, Maarten Op de Beeck, Goran Wallin, Johan Uddling, Lasse Tarvainen, Maj-Lena Linderson, Lucas A. Cernusak, Jesse B. Nippert, Troyw. Ocheltree, David T. Tissue, Nicolas K. Martin-St Paul, Alistair Rogers, Je M. Warren, Paolo De Angelis, Kouki Hikosaka, Qingmin Han, Yusuke Onoda, Teresa E. Gimeno, Craig V. M. Barton, Jonathan Bennie, Damien Bonal, Alexandre Bosc, Markus Loew, Cate Macinins-Ng, Ana Rey, Lucy Rowland, Samantha A. Setterfield, Sabine Tausz-Posch, Joana Zaragoza-Castells, Mark S. J. Broadmeadow, John E. Drake, Michael Freeman, Oula Ghannoum, Lindsay B. Hutley, Jeff W. Kelly, Kihachiro Kikuzawa, Pasi Kolari, Kohei Koyama, Jean-Marc Limousin, Patrick Meir, Antonio C. Lola da Costa, Teis N. Mikkelsen, Norma Salinas, Wei Sun, Lisa Wingate

NATURE CLIMATE CHANGE　5　(5)　459-464　2015/05

DOI： 10.1038/NCLIMATE2550 　

ISSN： 1758-678X

eISSN： 1758-6798
A Genome Scan for Genes Underlying Microgeographic-Scale Local Adaptation in a Wild Arabidopsis Species Peer-reviewed

Kubota, Shosei, Iwasaki, Takaya, Hanada, Kousuke, Nagano, Atsushi J., Fujiyama, Asao, Toyoda, Atsushi, Sugano, Sumio, Suzuki, Yutaka, Hikosaka, Kouki, Ito, Motomi, Morinaga, Shin-Ichi

Plos Genetics　11　(7)　e1005361　2015

DOI： 10.1371/journal.pgen.1005361 　

ISSN： 1553-7404
Homeostasis of the temperature sensitivity of respiration over a range of growth temperatures indicated by a modified Arrhenius model Peer-reviewed

Noguchi, Ko, Yamori, Wataru, Hikosaka, Kouki, Terashima, Ichiro

New Phytologist　207　(1)　34-42　2015

DOI： 10.1111/nph.13339 　

ISSN： 0028-646X
Optimal stomatal behaviour around the world Peer-reviewed

Lin, Yan-Shih, Medlyn, Belinda E., Duursma, Remko A., Prentice, I. Colin, Wang, Han, Baig, Sofia, Eamus, Derek, Resco de Dios, Victor, Mitchell, Patrick, Ellsworth, David S., Op de Beeck, Maarten, Wallin, Goran, Uddling, Johan, Tarvainen, Lasse, Linderson, Maj-Lena, Cernusak, Lucas A., Nippert, Jesse B., Ocheltree, Troyw., Tissue, David T., Martin-St Paul, Nicolas K., Rogers, Alistair, Warren, Je M., De Angelis, Paolo, Hikosaka, Kouki, Han, Qingmin, Onoda, Yusuke, Gimeno, Teresa E., Barton, Craig V. M., Bennie, Jonathan, Bonal, Damien, Bosc, Alexandre, Loew, Markus, Macinins-Ng, Cate, Rey, Ana, Rowland, Lucy, Setterfield, Samantha A., Tausz-Posch, Sabine, Zaragoza-Castells, Joana, Broadmeadow, Mark S. J., Drake, John E., Freeman, Michael, Ghannoum, Oula, Hutley, Lindsay B., Kelly, Jeff W., Kikuzawa, Kihachiro, Kolari, Pasi, Koyama, Kohei, Limousin, Jean-Marc, Meir, Patrick, Lola da Costa, Antonio C., Mikkelsen, Teis N., Salinas, Norma, Sun, Wei, Wingate, Lisa

Nature Climate Change　5　(5)　459-464　2015

DOI： 10.1038/NCLIMATE2550 　

ISSN： 1758-678X
Ecophysiology of resource allocation and trade-offs in carbon gain under changing environment. Invited Peer-reviewed

Hikosaka K, Yasumura Y, Muller O, Oguchi R

Trees in a changing environment, Ecophysiology, adaptation and future survival series, plant ecophysiology volume 9　2014/08/26
IS UV-INDUCED DNA DAMAGE GREATER AT HIGHER ELEVATION? Peer-reviewed

Qing-Wei Wang, Jun Hidema, Kouki Hikosaka

AMERICAN JOURNAL OF BOTANY　101　(5)　796-802　2014/05

DOI： 10.3732/ajb.1400010 　

ISSN： 0002-9122

eISSN： 1537-2197
Vulnerability of moorland plant communities to environmental change: consequences of realistic species loss on functional diversity Peer-reviewed

Takehiro Sasaki, Masatoshi Katabuchi, Chiho Kamiyama, Masaya Shimazaki, Tohru Nakashizuka, Kouki Hikosaka

JOURNAL OF APPLIED ECOLOGY　51　(2)　299-308　2014/04

DOI： 10.1111/1365-2664.12192 　

ISSN： 0021-8901

eISSN： 1365-2664
Temperature response of photosynthesis in C-3, C-4, and CAM plants: temperature acclimation and temperature adaptation Peer-reviewed

Wataru Yamori, Kouki Hikosaka, Danielle A. Way

PHOTOSYNTHESIS RESEARCH　119　(1-2)　101-117　2014/02

DOI： 10.1007/s11120-013-9874-6 　

ISSN： 0166-8595

eISSN： 1573-5079
Global dependence of field-observed leaf area index in woody species on climate: a systematic review Peer-reviewed

Iio, Atsuhiro, Hikosaka, Kouki, Anten, Niels P. R., Nakagawa, Yoshiaki, Ito, Akihiko

Global Ecology and Biogeography　23　(3)　274-285　2014

DOI： 10.1111/geb.12133 　

ISSN： 1466-822X

eISSN： 1466-8238
Leaf-trait responses to environmental gradients in moorland communities: contribution of intraspecific variation, species replacement and functional group replacement Peer-reviewed

Kamiyama, Chiho, Katabuchi, Masatoshi, Sasaki, Takehiro, Shimazaki, Masaya, Nakashizuka, Tohru, Hikosaka, Kouki

Ecological Research　29　(4)　607-617　2014

DOI： 10.1007/s11284-014-1148-z 　

ISSN： 0912-3814

eISSN： 1440-1703
Seasonal change in light partitioning among coexisting species of different functional groups along elevation gradient in subalpine moorlands Peer-reviewed

Kamiyama, Chiho, Oikawa, Shimpei, Hikosaka, Kouki

New Phytologist　204　(4)　913-923　2014

DOI： 10.1111/nph.12960 　

ISSN： 0028-646X

eISSN： 1469-8137
Optimal nitrogen distribution within a leaf canopy under direct and diffuse light Peer-reviewed

Hikosaka, Kouki

Plant Cell and Environment　37　(9)　2077-2085　2014

DOI： 10.1111/pce.12291 　

ISSN： 0140-7791

eISSN： 1365-3040
Variations in Species Composition of Moorland Plant Communities Along Environmental Gradients Within a Subalpine Zone in Northern Japan Peer-reviewed

Takehiro Sasaki, Masatoshi Katabuchi, Chiho Kamiyama, Masaya Shimazaki, Tohru Nakashizuka, Kouki Hikosaka

WETLANDS　33　(2)　269-277　2013/04

DOI： 10.1007/s13157-013-0380-6 　

ISSN： 0277-5212
Pinus pumila Photosynthesis Is Suppressed by Water Stress in a Wind-Exposed Mountain Site Peer-reviewed

Nagano, Soichiro, Nakano, Takashi, Hikosaka, Kouki, Maruta, Emiko

Arctic Antarctic and Alpine Research　45　(2)　229-237　2013

DOI： 10.1657/1938-4246-45.2.229 　

ISSN： 1523-0430
Effects of elevated CO2 on leaf area dynamics in nodulating and non-nodulating soybean stands Peer-reviewed

Oikawa, Shimpei, Okada, Masumi, Hikosaka, Kouki

Plant and Soil　373　(1-2)　627-639　2013

DOI： 10.1007/s11104-013-1826-6 　

ISSN： 0032-079X
Nestedness and niche-based species loss in moorland plant communities Peer-reviewed

Takehiro Sasaki, Masatoshi Katabuchi, Chiho Kamiyama, Masaya Shimazaki, Tohru Nakashizuka, Kouki Hikosaka

OIKOS　121　(11)　1783-1790　2012/11

DOI： 10.1111/j.1600-0706.2012.20152.x 　

ISSN： 0030-1299
Diversity partitioning of moorland plant communities across hierarchical spatial scales Peer-reviewed

Sasaki, Takehiro, Katabuchi, Masatoshi, Kamiyama, Chiho, Shimazaki, Masaya, Nakashizuka, Tohru, Hikosaka, Kouki

Biodiversity and Conservation　21　(6)　1577-1588　2012

DOI： 10.1007/s10531-012-0265-7 　

ISSN： 0960-3115
Not only light quality but also mechanical stimuli are involved in height convergence in crowded Chenopodium album stands Peer-reviewed

Nagashima, Hisae, Hikosaka, Kouki

New Phytologist　195　(4)　803-811　2012

DOI： 10.1111/j.1469-8137.2012.04218.x 　

ISSN： 0028-646X
Polygonum sachalinense alters the balance between capacities of regeneration and carboxylation of ribulose-1,5-bisphosphate in response to growth CO2 increment but not the nitrogen allocation within the photosynthetic apparatus Peer-reviewed

Akita, Risako, Kamiyama, Chiho, Hikosaka, Kouki

Physiologia Plantarum　146　(4)　404-412　2012

DOI： 10.1111/j.1399-3054.2012.01631.x 　

ISSN： 0031-9317
An evolutionary game of leaf dynamics and its consequences for canopy structure Peer-reviewed

Hikosaka, Kouki, Anten, Niels P. R.

Functional Ecology　26　(5)　1024-1032　2012

DOI： 10.1111/j.1365-2435.2012.02042.x 　

ISSN： 0269-8463
Environmental dependence of population dynamics and height growth of a subalpine conifer across its vertical distribution: an approach using high-resolution aerial photographs Peer-reviewed

Masaya Shimazaki, Takehiro Sasaki, Kouki Hikosaka, Tohru Nakashizuka

GLOBAL CHANGE BIOLOGY　17　(11)　3431-3438　2011/11

DOI： 10.1111/j.1365-2486.2011.02491.x 　

ISSN： 1354-1013
風洞実験によるオオオナモミの風耐性における力学的性質の解析

長嶋寿江, 太田福雄, 伊賀由佳, 彦坂幸毅

日本生態学会第58回大会講演論文集, 札幌(2011.3.8-12)　2011
Phenotypic and genetic differences in a perennial herb across a natural gradient of CO2 concentration Peer-reviewed

Nakamura, Ito, Onoda, Yusuke, Matsushima, Noe, Yokoyama, Jun, Kawata, Masakado, Hikosaka, Kouki

Oecologia　165　(3)　809-818　2011

DOI： 10.1007/s00442-010-1900-1 　

ISSN： 0029-8549
Plants in a crowded stand regulate their height growth so as to maintain similar heights to neighbours even when they have potential advantages in height growth Peer-reviewed

Nagashima, Hisae, Hikosaka, Kouki

Annals of Botany　108　(1)　207-214　2011

DOI： 10.1093/aob/mcr109 　

ISSN： 0305-7364
Optimal use of leaf nitrogen explains seasonal changes in leaf nitrogen content of an understorey evergreen shrub Peer-reviewed

Muller, Onno, Hirose, Tadaki, Werger, Marinus J. A., Hikosaka, Kouki

Annals of Botany　108　(3)　529-536　2011

DOI： 10.1093/aob/mcr167 　

ISSN： 0305-7364
Effects of elevated CO2 concentration on seed production in C-3 annual plants Peer-reviewed

Hikosaka, Kouki, Kinugasa, Toshihiko, Oikawa, Shimpei, Onoda, Yusuke, Hirose, Tadaki

Journal of Experimental Botany　62　(4)　1523-1530　2011

DOI： 10.1093/jxb/erq401 　

ISSN： 0022-0957
Mechanisms underlying interspecific variation in photosynthetic capacity across wild plant species Peer-reviewed

Hikosaka, Kouki

Plant Biotechnology　27　(3)　223-229　2010

DOI： 10.5511/plantbiotechnology.27.223 　

ISSN： 1342-4580
Phenotypic Plasticity in Photosynthetic Temperature Acclimation among Crop Species with Different Cold Tolerances Peer-reviewed

Wataru Yamori, Ko Noguchi, Kouki Hikosaka, Ichiro Terashima

PLANT PHYSIOLOGY　152　(1)　388-399　2010/01

DOI： 10.1104/pp.109.145862 　

ISSN： 0032-0889

eISSN： 1532-2548
Interactions between elevated CO2 and N-2-fixation determine soybean yield-a test using a non-nodulated mutant Peer-reviewed

Oikawa, Shimpei, Miyagi, Kay-May, Hikosaka, Kouki, Okada, Masumi, Matsunami, Toshinori, Kokubun, Makie, Kinugasa, Toshihiko, Hirose, Tadaki

Plant and Soil　330　(1-2)　163-172　2010

DOI： 10.1007/s11104-009-0189-5 　

ISSN： 0032-079X
Effects of atmospheric CO2 concentration, irradiance, and soil nitrogen availability on leaf photosynthetic traits of Polygonum sachalinense around natural CO2 springs in northern Japan Peer-reviewed

Osada, Noriyuki, Onoda, Yusuke, Hikosaka, Kouki

Oecologia　164　(1)　41-52　2010

DOI： 10.1007/s00442-010-1635-z 　

ISSN： 0029-8549
Light interception in species with different functional groups coexisting in moorland plant communities Peer-reviewed

Kamiyama, Chiho, Oikawa, Shimpei, Kubo, Takuya, Hikosaka, Kouki

Oecologia　164　(3)　591-599　2010

DOI： 10.1007/s00442-010-1674-5 　

ISSN： 0029-8549
WHY DOES VIOLA HONDOENSIS (VIOLACEAE) SHED ITS WINTER LEAVES IN SPRING? Peer-reviewed

Hikosaka, Kouki, Kawauchi, Yoshie, Kurosawa, Takahide

American Journal of Botany　97　(12)　1944-1950　2010

DOI： 10.3732/ajb.1000045 　

ISSN： 0002-9122
Cold-Tolerant Crop Species Have Greater Temperature Homeostasis of Leaf Respiration and Photosynthesis Than Cold-Sensitive Species Peer-reviewed

Wataru Yamori, Ko Noguchi, Kouki Hikosaka, Ichiro Terashima

PLANT AND CELL PHYSIOLOGY　50　(2)　203-215　2009/02

DOI： 10.1093/pcp/pcn189 　

ISSN： 0032-0781
Does leaf photosynthesis adapt to CO2-enriched environments? An experiment on plants originating from three natural CO2 springs Peer-reviewed

Onoda, Yusuke, Hirose, Tadaki, Hikosaka, Kouki

New Phytologist　182　(3)　698-709　2009

DOI： 10.1111/j.1469-8137.2009.02786.x 　

ISSN： 0028-646X
A paradox of leaf-trait convergence: why is leaf nitrogen concentration higher in species with higher photosynthetic capacity? Peer-reviewed

Hikosaka, Kouki, Osone, Yoko

Journal of Plant Research　122　(3)　245-251　2009

DOI： 10.1007/s10265-009-0222-z 　

ISSN： 0918-9440
The role of Rubisco and cell walls in the interspecific variation in photosynthetic capacity Peer-reviewed

Hikosaka, Kouki, Shigeno, Aki

Oecologia　160　(3)　443-451　2009

DOI： 10.1007/s00442-009-1315-z 　

ISSN： 0029-8549
The leaf anatomy of a broad-leaved evergreen allows an increase in leaf nitrogen content in winter Peer-reviewed

Muller, Onno, Oguchi, Riichi, Hirose, Tadaki, Werger, Marinus J. A., Hikosaka, Kouki

Physiologia Plantarum　136　(3)　299-309　2009

DOI： 10.1111/j.1399-3054.2009.01224.x 　

ISSN： 0031-9317
Carbon balance in a monospecific stand of an annual herb Chenopodium album at an elevated CO2 concentration Peer-reviewed

Borjigidai, Almaz, Hikosaka, Kouki, Hirose, Tadaki

Plant Ecology　203　(1)　33-44　2009

DOI： 10.1007/s11258-008-9502-2 　

ISSN： 1385-0237
Needle traits of an evergreen, coniferous shrub growing at wind-exposed and protected sites in a mountain region: does Pinus pumila produce needles with greater mass per area under wind-stress conditions? Peer-reviewed

Nagano, S., Nakano, T., Hikosaka, K., Maruta, E.

Plant Biology　11　94-100　2009

DOI： 10.1111/j.1438-8677.2009.00253.x 　

ISSN： 1435-8603
Relationships between photosynthetic activity and silica accumulation with ages of leaf in Sasa veitchii (Poaceae, Bambusoideae) Peer-reviewed

Motomura, Hiroyuki, Hikosaka, Kouki, Suzuki, Mitsuo

Annals of Botany　101　(3)　463-468　2008

DOI： 10.1093/aob/mcm301 　

ISSN： 0305-7364
Costs and benefits of photosynthetic light acclimation by tree seedlings in response to gap formation Peer-reviewed

Oguchi, R., Hikosaka, K., Hiura, T., Hirose, T.

Oecologia　155　(4)　665-675　2008

DOI： 10.1007/s00442-007-0951-4 　

ISSN： 0029-8549
Does leaf shedding increase the whole-plant carbon gain despite some nitrogen being lost with shedding? Peer-reviewed

Oikawa, Shimpei, Hikosaka, Kouki, Hirose, Tadaki

New Phytologist　178　(3)　617-624　2008

DOI： 10.1111/j.1469-8137.2008.02415.x 　

ISSN： 0028-646X
Reproductive yield of individuals competing for light in a dense stand of an annual, Xanthium canadense Peer-reviewed

Matsumoto, Yosuke, Oikawa, Shimpei, Yasumura, Yuko, Hirose, Tadaki, Hikosaka, Kouki

Oecologia　157　(2)　185-195　2008

DOI： 10.1007/s00442-008-1062-6 　

ISSN： 0029-8549
Molecular to ecological level : Advances of physiological ecology

Hikosaka Kouki, Watanuki Yutaka

JAPANESE JOURNAL OF ECOLOGY　57　(3)　334-334　2007
Publisher: The Ecological Society of Japan
DOI： 10.18960/seitai.57.3_334 　

ISSN： 0021-5007
Role of physiological ecology

Watanuki Yutaka, Hikosaka Kouki

JAPANESE JOURNAL OF ECOLOGY　57　(3)　369-372　2007
Publisher: The Ecological Society of Japan
DOI： 10.18960/seitai.57.3_369 　

ISSN： 0021-5007
Nitrogen resorption and protein degradation during leaf senescence in Chenopodium album grown in different light and nitrogen conditions Peer-reviewed

Yuko Yasumura, Kouki Hikosaka, Tadaki Hirose

FUNCTIONAL PLANT BIOLOGY　34　(5)　409-417　2007

DOI： 10.1071/FP06307 　

ISSN： 1445-4408

eISSN： 1445-4416
Elevated CO2 concentration, nitrogen use, and seed production in annual plants Peer-reviewed

Miyagi, Kay-May, Kinugasa, Toshihiko, Hikosaka, Kouki, Hirose, Tadaki

Global Change Biology　13　(10)　2161-2170　2007

DOI： 10.1111/j.1365-2486.2007.01429.x 　

ISSN： 1354-1013
Effect of elevated CO2 levels on leaf starch, nitrogen and photosynthesis of plants growing at three natural CO2 springs in Japan Peer-reviewed

Onoda, Yusuke, Hirose, Tadaki, Hikosaka, Kouki

Ecological Research　22　(3)　475-484　2007

DOI： 10.1007/s11284-006-0030-z 　

ISSN： 0912-3814
Intraspecific variation in temperature dependence of gas exchange characteristics among Plantago asiatica ecotypes from different temperature regimes Peer-reviewed

Ishikawa, Kazumasa, Onoda, Yusuke, Hikosaka, Kouki

New Phytologist　176　(2)　356-364　2007

DOI： 10.1111/j.1469-8137.2007.02186.x 　

ISSN： 0028-646X
Seasonal changes in the temperature response of photosynthesis in canopy leaves of Quercus crispula in a cool-temperate forest Peer-reviewed

Hikosaka, Kouki, Nabeshima, Eri, Hiura, Tsutom

Tree Physiology　27　(7)　1035-1041　2007

DOI： 10.1093/treephys/27.7.1035 　

ISSN： 0829-318X
Seasonal changes in photosynthesis, nitrogen content and nitrogen partitioning in Lindera umbellata leaves grown in high or low irradiance Peer-reviewed

Yuko Yasumura, Kouki Hikosaka, Tadaki Hirose

TREE PHYSIOLOGY　26　(10)　1315-1323　2006/10

DOI： 10.1093/treephys/26.10.1315 　

ISSN： 0829-318X

eISSN： 1758-4469
Resource allocation to vegetative and reproductive growth in relation to mast seeding in Fagus crenata Peer-reviewed

Yuko Yasumura, Kouki Hikosaka, Tadaki Hirose

FOREST ECOLOGY AND MANAGEMENT　229　(1-3)　228-233　2006/07

DOI： 10.1016/j.foreco.2006.04.003 　

ISSN： 0378-1127

eISSN： 1872-7042
Temperature acclimation of photosynthesis: mechanisms involved in the changes in temperature dependence of photosynthetic rate Peer-reviewed

Hikosaka, K, Ishikawa, K, Borjigidai, A, Muller, O, Onoda, Y

Journal of Experimental Botany　57　(2)　291-302　2006

DOI： 10.1093/jxb/erj049 　

ISSN： 0022-0957
Leaf anatomy and light acclimation in woody seedlings after gap formation in a cool-temperate deciduous forest Peer-reviewed

Oguchi, R., Hikosaka, K., Hiura, T., Hirose, T.

Oecologia　149　(4)　571-582　2006

DOI： 10.1007/s00442-006-0485-1 　

ISSN： 0029-8549
Seasonal changes in temperature dependence of photosynthetic rate in rice under a free-air CO2 enrichment Peer-reviewed

Borjigidai, A, Hikosaka, K, Hirose, T, Hasegawa, T, Okada, M, Kobayashi, K

Annals of Botany　97　(4)　549-557　2006

DOI： 10.1093/aob/mcl001 　

ISSN： 0305-7364
Leaf lifespan and lifetime carbon balance of individual leaves in a stand of an annual herb, Xanthium canadense Peer-reviewed

Oikawa, Shimpei, Hikosaka, Kouki, Hirose, Tadaki

New Phytologist　172　(1)　104-116　2006

DOI： 10.1111/j.1469-8137.2006.01813.x 　

ISSN： 0028-646X
Plant responses to elevated CO2 concentration at different scales: Leaf, whole plant, canopy, and population Peer-reviewed

Kouki Hikosaka, Yusuke Onoda, Toshihiko Kinugasa, Hisae Nagashima, Niels P. R. Anten, Tadaki Hirose

Forest Ecosystems and Environments: Scaling Up from Shoot Module to Watershed　3-13　2005
Publisher: Springer Tokyo
DOI： 10.1007/4-431-29361-2_1 　
Leaf canopy as a dynamic system: Ecophysiology and optimality in leaf turnover Peer-reviewed

Hikosaka, K

Annals of Botany　95　(3)　521-533　2005

DOI： 10.1093/aob/mci050 　

ISSN： 0305-7364
Seasonal change in the balance between capacities of RuBP carboxylation and RuBP regeneration affects CO2 response of photosynthesis in Polygonum cuspidatum Peer-reviewed

Onoda, Y, Hikosaka, K, Hirose, T

Journal of Experimental Botany　56　(412)　755-763　2005

DOI： 10.1093/jxb/eri052 　

ISSN： 0022-0957
Plant responses to elevated CO2 concentration at different scales: leaf, whole plant, canopy, and population Peer-reviewed

Hikosaka, K, Onoda, Y, Kinugasa, T, Nagashima, H, Anten, NPR, Hirose, T

Ecological Research　20　(3)　243-253　2005

DOI： 10.1007/s11284-005-0041-1 　

ISSN： 0912-3814
Biomass allocation and leaf chemical defence in defoliated seedlings of Quercus serrata with respect to carbon-nitrogen balance Peer-reviewed

Hikosaka, K, Takashima, T, Kabeya, D, Hirose, T, Kamata, N

Annals of Botany　95　(6)　1025-1032　2005

DOI： 10.1093/aob/mci111 　

ISSN： 0305-7364
Leaf anatomy as a constraint for photosynthetic acclimation: differential responses in leaf anatomy to increasing growth irradiance among three deciduous trees Peer-reviewed

Oguchi, R, Hikosaka, K, Hirose, T

Plant Cell and Environment　28　(7)　916-927　2005

DOI： 10.1111/j.1365-3040.2005.01344.x 　

ISSN： 0140-7791
Respiration and reproductive effort in Xanthium canadense Peer-reviewed

Kinugasa, T, Hikosaka, K, Hirose, T

Annals of Botany　96　(1)　81-89　2005

DOI： 10.1093/aob/mci152 　

ISSN： 0305-7364
Seasonal changes in light and temperature affect the balance between light harvesting and light utilisation components of photosynthesis in an evergreen understory shrub Peer-reviewed

Muller, O, Hikosaka, K, Hirose, T

Oecologia　143　(4)　501-508　2005

DOI： 10.1007/s00442-005-0024-5 　

ISSN： 0029-8549
Dynamics of leaf area and nitrogen in the canopy of an annual herb, Xanthium canadense Peer-reviewed

Oikawa, S, Hikosaka, K, Hirose, T

Oecologia　143　(4)　517-526　2005

DOI： 10.1007/s00442-005-0007-6 　

ISSN： 0029-8549
Nitrogen resorption from leaves under different growth irradiance in three deciduous woody species Peer-reviewed

Yasumura, Y, Onoda, Y, Hikosaka, K, Hirose, T

Plant Ecology　178　(1)　29-37　2005

DOI： 10.1007/s11258-004-2485-8 　

ISSN： 1385-0237
Nitrogen partitioning in the photosynthetic apparatus of Plantago asiatica leaves grown under different temperature and light conditions: Similarities and differences between temperature and light acclimation Peer-reviewed

Hikosaka, K

Plant and Cell Physiology　46　(8)　1283-1290　2005

DOI： 10.1093/pcp/pci137 　

ISSN： 0032-0781
The balance between RuBP carboxylation and RuBP regeneration: a mechanism underlying the interspecific variation in acclimation of photosynthesis to seasonal change in temperature Peer-reviewed

Onoda, Y, Hikosaka, K, Hirose, T

Functional Plant Biology　32　(10)　903-910　2005

DOI： 10.1071/FP05024 　

ISSN： 1445-4408
Natural CO2 springs in Japan: A case study of vegetation dynamics Peer-reviewed

Onoda, Y., Hikosaka, K., Hirose, T.

Phyton-Annales Rei Botanicae　45　(4)　389-394　2005

ISSN： 0079-2047
Reproductive growth and respiration in an annual under elevated CO2 Peer-reviewed

Kinugasa, T., Hikosaka, K., Hirose, T.

Phyton-Annales Rei Botanicae　45　(4)　415-418　2005

ISSN： 0079-2047
Modulation of leaf economic traits and trait relationships by climate Peer-reviewed

Wright, IJ, Reich, PB, Cornelissen, JHC, Falster, DS, Groom, PK, Hikosaka, K, Lee, W, Lusk, CH, Niinemets, U, Oleksyn, J, Osada, N, Poorter, H, Warton, DI, Westoby, M

Global Ecology and Biogeography　14　(5)　411-421　2005

DOI： 10.1111/j.1466-822x.2005.00172.x 　

ISSN： 1466-822X
Assessing the generality of global leaf trait relationships Peer-reviewed

Wright, IJ, Reich, PB, Cornelissen, JHC, Falster, DS, Garnier, E, Hikosaka, K, Lamont, BB, Lee, W, Oleksyn, J, Osada, N, Poorter, H, Villar, R, Warton, DI, Westoby, M

New Phytologist　166　(2)　485-496　2005

DOI： 10.1111/j.1469-8137.2005.01349.x 　

ISSN： 0028-646X
Cost-benefit relationships in fronds emerging at different times in a deciduous fern, Pteridium aquilinum Peer-reviewed

S Oikawa, K Hikosaka, T Hirose, M Shiyomi, S Takahashi, Y Hori

CANADIAN JOURNAL OF BOTANY-REVUE CANADIENNE DE BOTANIQUE　82　(4)　521-527　2004/04

DOI： 10.1139/B04-026 　

ISSN： 0008-4026
The worldwide leaf economics spectrum Peer-reviewed

Wright, IJ, Reich, PB, Westoby, M, Ackerly, DD, Baruch, Z, Bongers, F, Cavender-Bares, J, Chapin, T, Cornelissen, JHC, Diemer, M, Flexas, J, Garnier, E, Groom, PK, Gulias, J, Hikosaka, K, Lamont, BB, Lee, T, Lee, W, Lusk, C, Midgley, JJ, Navas, ML, Niinemets, U, Oleksyn, J, Osada, N, Poorter, H, Poot, P, Prior, L, Pyankov, VI, Roumet, C, Thomas, SC, Tjoelker, MG, Veneklaas, EJ, Villar, R

Nature　428　(6985)　821-827　2004

DOI： 10.1038/nature02403 　

ISSN： 0028-0836
Allocation of nitrogen to cell walls decreases photosynthetic nitrogen-use efficiency Peer-reviewed

Onoda, Y, Hikosaka, K, Hirose, T

Functional Ecology　18　(3)　419-425　2004

DOI： 10.1111/j.0269-8463.2004.00847.x 　

ISSN： 0269-8463
Photosynthesis or persistence: nitrogen allocation in leaves of evergreen and deciduous Quercus species Peer-reviewed

Takashima, T, Hikosaka, K, Hirose, T

Plant Cell and Environment　27　(8)　1047-1054　2004

DOI： 10.1111/j.1365-3040.2004.01209.x 　

ISSN： 0140-7791
Photosynthetic rates and partitioning of absorbed light energy in photoinhibited leaves Peer-reviewed

Hikosaka, K, Kato, MC, Hirose, T

Physiologia Plantarum　121　(4)　699-708　2004

DOI： 10.1111/j.1399-3054.2004.00364.x 　

ISSN： 0031-9317
Interspecific difference in the photosynthesis-nitrogen relationship: patterns, physiological causes, and ecological importance Peer-reviewed

Hikosaka, K

Journal of Plant Research　117　(6)　481-494　2004

DOI： 10.1007/s10265-004-0174-2 　

ISSN： 0918-9440
Cost-benefit relationships in fronds emerging at different times in a deciduous fern, Pteridium aquilinum Peer-reviewed

Oikawa, S, Hikosaka, K, Hirose, T, Shiyomi, M, Takahashi, S, Hori, Y

Canadian Journal of Botany-Revue Canadienne De Botanique　82　(4)　521-527　2004

DOI： 10.1139/B04-026 　

ISSN： 0008-4026
Energy consumption in growth of an annual plant Peer-reviewed

Kinugasa T, Hikosaka K, Hirose T

Japanese Journal of Ecology　53　(1)　55-60　2003
Publisher: The Ecological Society of Japan
DOI： 10.18960/seitai.53.1_55 　

ISSN： 0021-5007
Light-acquisition and use of individuals as influenced by elevated CO2 in even-aged monospecific stands of Chenopodium album Peer-reviewed

Hikosaka, K, Yamano, T, Nagashima, H, Hirose, T

Functional Ecology　17　(6)　786-795　2003

DOI： 10.1111/j.1365-2435.2003.00793.x 　

ISSN： 0269-8463
A model of dynamics of leaves and nitrogen in a plant canopy: An integration of canopy photosynthesis, leaf life span, and nitrogen use efficiency Peer-reviewed

Hikosaka, K

American Naturalist　162　(2)　149-164　2003

DOI： 10.1086/376576 　

ISSN： 0003-0147
The excess light energy that is neither utilized in photosynthesis nor dissipated by photoprotective mechanisms determines the rate of photoinactivation in photosystem II Peer-reviewed

Kato, MC, Hikosaka, K, Hirotsu, N, Makino, A, Hirose, T

Plant and Cell Physiology　44　(3)　318-325　2003

DOI： 10.1093/pcp/pcg045 　

ISSN： 0032-0781
Does the photosynthetic light-acclimation need change in leaf anatomy? Peer-reviewed

Oguchi, R, Hikosaka, K, Hirose, T

Plant Cell and Environment　26　(4)　505-512　2003

DOI： 10.1046/j.1365-3040.2003.00981.x 　

ISSN： 0140-7791
Effects of elevated CO2 on the size structure in even-aged monospecific stands of Chenopodium album Peer-reviewed

Nagashima, H, Yamano, T, Hikosaka, K, Hirose, T

Global Change Biology　9　(4)　619-629　2003

DOI： 10.1046/j.1365-2486.2003.00623.x 　

ISSN： 1354-1013
Contribution of photosynthetic electron transport, heat dissipation, and recovery of photoinactivated photosystem II to photoprotection at different temperatures in Chenopodium album leaves Peer-reviewed

Tsonev, TD, Hikosaka, K

Plant and Cell Physiology　44　(8)　828-835　2003

DOI： 10.1093/pcp/pcg107 　

ISSN： 0032-0781
Reproductive allocation of an annual, Xanthium canadense, at an elevated carbon dioxide concentration Peer-reviewed

Kinugasa, T, Hikosaka, K, Hirose, T

Oecologia　137　(1)　1-9　2003

DOI： 10.1007/s00442-003-1318-0 　

ISSN： 0029-8549
Increase in leaf mass per area benefits plant growth at elevated CO2 concentration Peer-reviewed

Ishizaki, S, Hikosaka, K, Hirose, T

Annals of Botany　91　(7)　905-914　2003

DOI： 10.1093/aob/mcg097 　

ISSN： 0305-7364
Light partitioning among species and species replacement in early successional grasslands Peer-reviewed

MJA Werger, T Hirose, HJ During, GW Heil, K Hikosaka, T Ito, UG Nachinshonhor, D Nagamatsu, K Shibasaki, S Takatsuki, JW van Rheenen, NPR Anten

JOURNAL OF VEGETATION SCIENCE　13　(5)　615-626　2002/10

DOI： 10.1658/1100-9233(2002)013[0615:LPASAS]2.0.CO;2 　

ISSN： 1100-9233
Leaf-level nitrogen-use efficiency of canopy and understorey species in a beech forest Peer-reviewed

Yasumura, Y, Hikosaka, K, Matsui, K, Hirose, T

Functional Ecology　16　(6)　826-834　2002

DOI： 10.1046/j.1365-2435.2002.00691.x 　

ISSN： 0269-8463
Light partitioning among species and species replacement in early successional grasslands Peer-reviewed

Werger, MJA, Hirose, T, During, HJ, Heil, GW, Hikosaka, K, Ito, T, Nachinshonhor, UG, Nagamatsu, D, Shibasaki, K, Takatsuki, S, van Rheenen, JW, Anten, NPR

Journal of Vegetation Science　13　(5)　615-626　2002

DOI： 10.1111/j.1654-1103.2002.tb02089.x 　

ISSN： 1100-9233
Leaf discs floated on water are different from intact leaves in photosynthesis and photoinhibition Peer-reviewed

Kato, MC, Hikosaka, K, Hirose, T

Photosynthesis Research　72　(1)　65-70　2002

DOI： 10.1023/A:1016097312036 　

ISSN： 0166-8595
Photosynthesis-nitrogen relationships in species at different altitudes on Mount Kinabalu, Malaysia Peer-reviewed

Hikosaka, K, Nagamatsu, D, Ishii, HS, Hirose, T

Ecological Research　17　(3)　305-313　2002

DOI： 10.1046/j.1440-1703.2002.00490.x 　

ISSN： 0912-3814
Photoinactivation and recovery of photosystem II in Chenopodium album leaves grown at different levels of irradiance and nitrogen availability Peer-reviewed

Kato, MC, Hikosaka, K, Hirose, T

Functional Plant Biology　29　(7)　787-795　2002

DOI： 10.1071/PP01162 　

ISSN： 1445-4408
Nitrogen uptake and use by competing individuals in a Xanthium canadense stand Peer-reviewed

Hikosaka, K, Hirose, T

Oecologia　126　(2)　174-181　2001

DOI： 10.1007/s004420000517 　

ISSN： 0029-8549
A simple formulation of interaction between individuals competing for light in a monospecific stand Peer-reviewed

Hikosaka, K, Nagashima, H, Harada, Y, Hirose, T

Functional Ecology　15　(5)　642-646　2001

DOI： 10.1046/j.0269-8463.2001.00557.x 　

ISSN： 0269-8463
Photosynthetic nitrogen-use efficiency in evergreen broad-leaved woody species coexisting in a warm-temperate forest Peer-reviewed

Hikosaka, K, Hirose, T

Tree Physiology　20　(18)　1249-1254　2000

ISSN： 0829-318X
Light acquisition and use by individuals competing in a dense stand of an annual herb, Xanthium canadense Peer-reviewed

Hikosaka, K, Sudoh, S, Hirose, T

Oecologia　118　(3)　388-396　1999

DOI： 10.1007/s004420050740 　

ISSN： 0029-8549
Balancing carboxylation and regeneration of ribulose-1,5-bisphosphate in leaf photosynthesis: temperature acclimation of an evergreen tree, Quercus myrsinaefolia Peer-reviewed

Hikosaka, K, Murakami, A, Hirose, T

Plant Cell and Environment　22　(7)　841-849　1999

DOI： 10.1046/j.1365-3040.1999.00442.x 　

ISSN： 0140-7791
Temperature acclimation of the photosynthetic apparatus: Balancing regeneration and carboxylation of ribulose bisphosphate Peer-reviewed

K Hikosaka, A Murakami, T Hirose

PHOTOSYNTHESIS: MECHANISMS AND EFFECTS, VOLS I-V　3395-3398　1998
Leaf nitrogen distribution in relation to leaf age and photon flux density in dominant and subordinate plants in dense stands of a dicotyledonous herb Peer-reviewed

Anten, NPR, Miyazawa, K, Hikosaka, K, Nagashima, H, Hirose, T

Oecologia　113　(3)　314-324　1998

DOI： 10.1007/s004420050382 　

ISSN： 0029-8549
Photosynthetic nitrogen-use efficiency in leaves of woody and herbaceous species Peer-reviewed

Hikosaka, K, Hanba, YT, Hirose, T, Terashima, I

Functional Ecology　12　(6)　896-905　1998

DOI： 10.1046/j.1365-2435.1998.00272.x 　

ISSN： 0269-8463
Leaf and canopy photosynthesis of C-3 plants at elevated CO2 in relation to optimal partitioning of nitrogen among photosynthetic components: theoretical prediction Peer-reviewed

Hikosaka, K, Hirose, T

Ecological Modelling　106　(2-3)　247-259　1998

DOI： 10.1016/S0304-3800(97)00198-1 　

ISSN： 0304-3800
Acclimation of the photosynthetic apparatus to changing environment.

HIKOSAKA Kouki

JAPANESE JOURNAL OF ECOLOGY　47　(3)　295-300　1997
Publisher: The Ecological Society of Japan
DOI： 10.18960/seitai.47.3_295 　

ISSN： 0021-5007
Modelling optimal temperature acclimation of the photosynthetic apparatus in C-3 plants with respect to nitrogen use Peer-reviewed

Hikosaka, K

Annals of Botany　80　(6)　721-730　1997

DOI： 10.1006/anbo.1997.0512 　

ISSN： 0305-7364
Effects of virus infection and growth irradiance on fitness components and photosynthetic properties of Eupatorium makinoi (Compositae) Peer-reviewed

Funayama, S, Hikosaka, K, Yahara, T

American Journal of Botany　84　(6)　823-829　1997

DOI： 10.2307/2445818 　

ISSN： 0002-9122
Leaf angle as a strategy for light competition: Optimal and evolutionarily stable light-extinction coefficient within a leaf canopy Peer-reviewed

Hikosaka, K, Hirose, T

Ecoscience　4　(4)　501-507　1997

DOI： 10.1080/11956860.1997.11682429 　

ISSN： 1195-6860
Effects of leaf age, nitrogen nutrition and photon flux density on the organization of the photosynthetic apparatus in leaves of a vine (Ipomoea tricolor Cav) grown horizontally to avoid mutual shading of leaves Peer-reviewed

Hikosaka, K

Planta　198　(1)　144-150　1996

ISSN： 0032-0935

eISSN： 1432-2048
Nitrogen partitioning among photosynthetic components and its consequence in sun and shade plants Peer-reviewed

Hikosaka, K, Terashima, I

Functional Ecology　10　(3)　335-343　1996

DOI： 10.2307/2390281 　

ISSN： 0269-8463
Three resistances to CO2 diffusion: Leaf-surface water, intercellular spaces and mesophyll cells Peer-reviewed

Terashima, I, M Ishibashi, K Ono, K Hikosaka

PHOTOSYNTHESIS: FROM LIGHT TO BIOSPHERE, VOL 5　537-542　1995
A MODEL OF THE ACCLIMATION OF PHOTOSYNTHESIS IN THE LEAVES OF C-3 PLANTS TO SUN AND SHADE WITH RESPECT TO NITROGEN USE Peer-reviewed

HIKOSAKA, K, TERASHIMA, I

Plant Cell and Environment　18　(6)　605-618　1995

DOI： 10.1111/j.1365-3040.1995.tb00562.x 　

ISSN： 0140-7791
COMPARATIVE ECOPHYSIOLOGY OF LEAF AND CANOPY PHOTOSYNTHESIS Peer-reviewed

TERASHIMA, I, HIKOSAKA, K

Plant Cell and Environment　18　(10)　1111-1128　1995

DOI： 10.1111/j.1365-3040.1995.tb00623.x 　

ISSN： 0140-7791
EFFECTS OF LEAF AGE, NITROGEN NUTRITION AND PHOTON FLUX-DENSITY ON THE DISTRIBUTION OF NITROGEN AMONG LEAVES OF A VINE (IPOMOEA-TRICOLOR-CAV) GROWN HORIZONTALLY TO AVOID MUTUAL SHADING OF LEAVES Peer-reviewed

HIKOSAKA, K, TERASHIMA, I, KATOH, S

Oecologia　97　(4)　451-457　1994

DOI： 10.1007/BF00325881 　
Effects of light, nutrient and age on nitrogen content and photosynthesis of leaves Peer-reviewed

Hikosaka Kouki, Terashima Ichiro, Katoh Sakae, Murata N

Research in photosynthesis, Vol. IV　381-384　1992

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The Japanese Forest Society Congress　133　161　2022/05/30
Publisher: THE JAPANESE FORESTRY SOCIETY
DOI： 10.11519/jfsc.133.0_161 　

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Altitudinal phenotypic variations of Arabidopsis halleri: Investigation into the distribution of trait values of F2 population

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Comparison of changes in several trees photosynthetic pigment in leaves and photoprotection to strong light stress.

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The Japanese Forest Society Congress　132　463　2021/05/24
Publisher: THE JAPANESE FORESTRY SOCIETY
DOI： 10.11519/jfsc.132.0_463 　

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[in Japanese]
Development of new satellite to monitor SIF and PRI of terrestrial vegetation

野田響, 大政謙次, 彦坂幸毅, 市井和仁, 小林秀樹, 加藤知道, 村岡裕由

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温帯ヒノキ林における太陽光誘起クロロフィル蛍光の環境依存性

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A novel technique to monitor thylakoid lumen pH with leaf reflectance in vivo

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日本植物生理学会年会(Web)　59th　ROMBUNNO.2aG05　2018
2017 Awards in the Journal of Plant Research

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JOURNAL OF PLANT RESEARCH　130　(6)　951-952　2017/11

DOI： 10.1007/s10265-017-0980-y 　

ISSN： 0918-9440

eISSN： 1618-0860
植物葉群における葉間窒素分配の最適性—Optimality of leaf nitrogen distribution in plant canopies—解説特集植物のバイオマス生産能力の強化に向けた取り組み

彦坂幸毅

光合成研究 = News letter / The Japanese Society of Photosynthesis Research　27　(2)　110-114　2017/08
Publisher: 日本光合成研究会
ISSN： 1884-2852
2step‐TILLINGを用いた自家不和合植物ハツカダイコンの突然変異体選抜法

上妻馨梨, 千葉元子, 千葉元子, 穴井豊昭, 上田実希, 小口理一, 花田耕介, 花田耕介, 彦坂幸毅, 彦坂幸毅, 藤井伸治, 藤井伸治

育種学研究　19　16　2017/03

ISSN： 1344-7629
Towards network construction between basic and applied researchers in Brassicaceae

Yamamoto Masaya, Fujii Sota, Kakizaki Tomohiro, Fujimoto Ryo, Hikosaka Kouki, Hatakeyama Katsunori, Ito Hidetaka, Okazaki Keiichi

Breeding Research　19　(1)　21-29　2017
Publisher: Japanese Society of Breeding
DOI： 10.1270/jsbbr.19.21 　

ISSN： 1344-7629

eISSN： 1348-1290
自然変異に学ぶ適応のしくみ: アブラナ科植物の種内変異を用いたアプローチ

彦坂幸毅, 森長真一, 小口理一, 永野聡一郎, 見塩昌子, 上妻馨梨, 藤井伸治, 須藤恵美, 石塚航, 田島直幸, 尾崎洋史, Wang Q-W, 花田耕介

育種学研究　19　24-25　2017
冷温帯落葉広葉樹林でのギャップ更新における,木本実生の光合成可塑性と林床生存率とのトレードオフ

小口理一, 日浦勉, 彦坂幸毅

日本植物学会大会研究発表記録　80th　155　2016/09/01
光合成の蛍光,分子から惑星まで—Photosynthetic fluorescence, from molecule to planet

ガブリエラシュラウ=コーエン, ジョゼフベリー, 彦坂幸毅

パリティ = Parity : 物理科学雑誌　31　(8)　48-50　2016/08
Publisher: 丸善出版
ISSN： 0911-4815
ゲノム情報を利用した野生植物の適応力多様性評価

久保田渉誠, 久保田渉誠, 岩崎貴也, 三浦憲人, 永野惇, 花田耕介, 花田耕介, 松葉史紗子, 宮下直, 彦坂幸毅, 伊藤元己, 森長真一

日本生態学会大会講演要旨(Web)　63th　P2‐049 (WEB ONLY)　2016
Modeling leaf gas exchange Invited Peer-reviewed

Hikosaka K, Noguchi K, Terashima I

Canopy Photosynthesis: From Basics to Applications, Advances in Photosynthesis and Respiration　42　61-100　2016
A Genome Scan for Genes Underlying Microgeographic-Scale Local Adaptation in a Wild Arabidopsis Species

Shosei Kubota, Takaya Iwasaki, Kousuke Hanada, Atsushi J. Nagano, Asao Fujiyama, Atsushi Toyoda, Sumio Sugano, Yutaka Suzuki, Kouki Hikosaka, Motomi Ito, Shin-Ichi Morinaga

PLoS Genetics　11　(7)　2015/07/01
Publisher: Public Library of Science
DOI： 10.1371/journal.pgen.1005361 　

ISSN： 1553-7404 1553-7390
ゲノムワイドSNPデータに基づくハクサンハタザオの系統地理解析

KUBOTA SHOSEI, IWASAKI TAKAYA, MIURA KENTO, NAGANO ATSUSHI, HANADA KOSUKE, HIKOSAKA KOKI, ITO MOTOMI, MORINAGA SHIN'ICHI

日本生態学会大会講演要旨(Web)　62nd　PA2-033 (WEB ONLY)　2015
コナラ林冠葉における光合成の温度依存性の時空間的変動が物質生産に与える影響

山口大輔, 中路達郎, 日浦勉, 芳賀弘和, 三島大, 中村こずえ, 松林玄悟, 佐野淳之, 彦坂幸毅

日本生態学会大会講演要旨(Web)　62nd　PA2-074 (WEB ONLY)　2015
森林林冠木の光をめぐる競争における個体間相互作用の定量化の試み

彦坂幸毅, 山口大輔, 長嶋寿江, 中路達郎, 日浦勉

日本生態学会大会講演要旨(Web)　62nd　PA2-077 (WEB ONLY)　2015
コナラ林冠葉における光合成の温度応答の緯度間比較とその生化学的要因の解明

山口大輔, 中路達郎, 日浦勉, 三島大, 中村こずえ, 佐野淳之, 彦坂幸毅

日本植物学会大会研究発表記録　78th　212　2014/09/01
気候変動が森林動態に与える影響と将来予測：八甲田山のオオシラビソを例として

田中孝尚, 嶋崎仁哉, 黒川紘子, 彦坂幸毅, 中静透

地球環境　19　(1)　47-50　2014/05
Publisher: 国際環境研究協会
ISSN： 1342-226X
機能形質から種のニッチ、共存、そして消失を理解する：亜高山帯湿原群集を対象とした群集生態学と生理生態学からのアプローチ

彦坂幸毅, 佐々木雄大, 神山千穂, 片渕正紀, 及川真平, 嶋崎仁哉, 木村啓, 中静透

地球環境　19　(1)　33-46　2014/05
Publisher: 国際環境研究協会
ISSN： 1342-226X
高二酸化炭素濃度に対する植物の長期的な応答

彦坂幸毅

化学と生物　52　(2)　113-120　2014/02
Publisher: Japan Society for Bioscience, Biotechnology, and Agrochemistry
DOI： 10.1271/kagakutoseibutsu.52.113 　

ISSN： 0453-073X

eISSN： 1883-6852
ゲノムワイドSNP情報から生育環境を読み解く~ハクサンハタザオの標高適応を例に~

KUBOTA WATAMASA, IWASAKI TAKAYA, NAGANO ATSUSHI, HANADA KOSUKE, HIKOSAKA KOKI, ITO MOTOMI, MORINAGA SHIN'ICHI

日本生態学会大会講演要旨(Web)　61st　PA1-039 (WEB ONLY)　2014
季節変化と温暖化処理がコナラ林冠葉の光合成の温度依存性に与える影響のシミュレーション解析

山口大輔, 中路達郎, 日浦勉, 彦坂幸毅

日本植物学会大会研究発表記録　77th　231　2013/08/20
植物と二酸化炭素

彦坂幸毅, 寺島一郎

化学と生物　51　(4)　250-256　2013/04/01
Publisher: 日本農芸化学会
DOI： 10.1271/kagakutoseibutsu.51.250 　

ISSN： 0453-073X
異なる緯度におけるコナラ林冠葉の温度‐光合成関係に対する温暖化処理の影響

山口大輔, 中路達郎, 日浦勉, 三島大, 中村こずえ, 佐野淳之, 彦坂幸毅

日本生態学会大会講演要旨集　60th　260　2013/03/05
ブナ高木の樹冠内窒素分配：葉の窒素含量は光環境に合わせて最適分配されているのか？

長田典之, 安村有子, 彦坂幸毅, 石田厚

日本生態学会大会講演要旨集　57th　293　2010/03/15
ブナの形質地理変異に着目した冷温帯林の生態系機能比較光合成窒素利用効率の緯度間変異とその生理学的原因

彦坂幸毅, MULLER Onno, 日浦勉

日本植物学会大会研究発表記録　73rd　81　2009/09/17
Modelling of photosynthetic rates in C3 plants

Low temperature science　67　67-71　2008
Publisher: 北海道大学低温科学研究所 = Institute of Low Temperature Science, Hokkaido University
ISSN： 1880-7593
Photosynthetic acclimation with respect to nitrogen use

HIKOSAKA Kouki

119　5-5　2006/12/01

ISSN： 0918-9440
窒素利用の観点からの光合成系順化の解析

彦坂幸毅

日本植物学会大会研究発表記録 = Proceedings of the annual meeting of the Botanical Society of Japan　70　64　2006/09/13
冷温帯落葉樹林の樹木実生におけるギャップ形成後の成長速度と光順化能力の関係

小口理一, 彦坂幸毅, 日浦勉, 広瀬忠樹

日本生態学会大会講演要旨集　53rd　321　2006/03/24
冷温帯林におけるミズナラ林冠葉の温度‐光合成特性の季節変化

彦坂幸毅, 鍋嶋絵里, 日浦勉

日本生態学会大会講演要旨集　52nd　250-540　2005/03/27
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.ESJ52.0.540.0 　
Effects of defoliation on photosynthesis and defense in Fagus crenata of different age

Okamoto Eri, Hikosaka Kouki, Hirose Tadaki, Kamata Naoto

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　578-578　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.578.0 　
The effects of elevated CO2 on reproduction of various annual species

Miyagi Keimei, Kinugasa Toshihiko, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　244-244　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.244.0 　
Does leaf photosynthesis adapt to CO₂-enriched environments? -An experiment on plants originating from three natural CO₂ springs

Onoda Yusuke, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　555-555　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.555.0 　
Effects of CO2, light, and nitrogen availability on leaf photosynthetic properties of Polygonum sachalinense grown in and around the natural CO2 springs

Osada Noriyuki, Onoda Yusuke, Hikosaka Kouki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　534-534　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.534.0 　
Lifetime carbon gain of individual leaves in a stand of an annual herb, Xanthium canadense

Oikawa Shimpei, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　156-156　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.156.0 　
Reproduction and respiration in an annual at an elevated carbon dioxide concentration

Kinugasa Toshihiko, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　234-234　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.234.0 　
Seasonal changes in photosynthesis and nitrogen partitioning in sun- and shade-leaves of Lindera umbellata, a deciduous woody shrub

Yasumura Yuko, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ52　563-563　2005
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj52.0.563.0 　
Seasonal changes in temperature dependence of the photosynthetic rate in rice at elevated CO ₂

Almaz, Hikosaka Kouki, Hirose Tadaki, Hasegawa Toshihiro, Okada Masumi, Kobayashi Kazuhiko

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ51　805-805　2004
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj51.0.805.0 　
Natural CO₂ springs in Japan: a model ecosystem of future high CO₂ world

Onoda Yusuke, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ51　146-146　2004
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj51.0.146.0 　
Litterfall and nitrogen return from Japanese beech (Fagus crenata) in relation to masting behaviour during five growing seasons

Yasumura Yuko, Hikosaka Kouki, Hirose Tadaki

Abstracts of the Annual Meeting of the Ecological Society of Japan　ESJ51　150-150　2004
Publisher: ECOLOGICAL SOCIETY OF JAPAN
DOI： 10.14848/esj.esj51.0.150.0 　
光合成過程の生態学

彦坂幸毅

植物生態学　42-80　2004
Publisher: 朝倉書店
植物が吸収した光のゆくえ

彦坂幸毅

化学と生物　41　559-561　2003/06
光合成機能の評価2 : クロロフィル蛍光

彦坂幸毅

種生物学研究　26　245-258　2003/05/10
Publisher: 文一総合出版
ISSN： 0913-5561
植物生理生態学が目指すもの

村岡裕由, 彦坂幸毅

種生物学研究　26　11-26　2003/05/10
Publisher: 文一総合出版
ISSN： 0913-5561
群落の光合成 : 葉の集合としての群落,個体の集合としての群落

彦坂幸毅

種生物学研究　26　57-84　2003/05/10
Publisher: 文一総合出版
ISSN： 0913-5561
光と水と植物のかたち植物生理生態学入門

村岡裕由, 彦坂幸毅, 寺島一郎, 小池孝良, 谷享, 舘野正樹, 久米篤, 半場祐子, 石田厚

種生物学研究　(26/27)　322P　2003/05/10

ISSN： 0913-5561
冷温帯林における人工ギャップ形成後の林床植物の光合成光順化

小口理一, 彦坂幸毅, 日浦勉, 広瀬忠樹

日本生態学会大会講演要旨集　ESJ50　266-266　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0_266_3 　
八甲田山田代平のCO₂ springにおけるCO₂環境と植物の生理生態学的特性

小野田雄介, 彦坂幸毅, 広瀬忠樹

日本生態学会大会講演要旨集　ESJ50　197-197　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0.197.1 　
異なる光·窒素条件で生育したシロザの葉からの窒素回収効率

安村有子, 彦坂幸毅, 広瀬忠樹

日本生態学会大会講演要旨集　ESJ50　127-127　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0_127_2 　
光合成に着目した、落葉樹と常緑樹の葉内窒素分配の比較

高島輝之, 彦坂幸毅, 広瀬忠樹

日本生態学会大会講演要旨集　ESJ50　267-267　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0_267_4 　
葉群内における個葉、葉面積、窒素のターンオーバー

及川真平, 彦坂幸毅, 広瀬忠樹

日本生態学会大会講演要旨集　ESJ50　121-121　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0_121_3 　
ブナ林以外の広葉樹林の実生の動態に対するササの一斉開花·枯死の影響

壁谷大介, 松井淳, 彦坂幸毅

日本生態学会大会講演要旨集　ESJ50　160-160　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0_160_3 　
久米篤・大槻恭一・熊谷朝臣・小川滋監訳, (2003), 「生物環境物理学の基礎第2版」, (G. S. Campbell & J. M. Norman著), 315 pp, 森北出版, 本体価格3,900円

彦坂幸毅

日本生態学会誌　53　(2)　118-119　2003
Publisher: 一般社団法人日本生態学会
DOI： 10.18960/seitai.53.2_118_2 　

ISSN： 0021-5007

eISSN： 2424-127X
窒素利用に着目した、オオバコにおける光合成系の温度順化の解析

彦坂幸毅

日本生態学会大会講演要旨集　ESJ50　270-270　2003
Publisher: 日本生態学会
DOI： 10.14848/esj.esj50.0.270.1 　
Quantification of energy partitioning among photoprotective mechanisms: Excess energy causes photoinactivation of photosystem II

K Hikosaka, MC Kato, TD Tsonev, T Hirose

PLANT AND CELL PHYSIOLOGY　44　S14-S14　2003

ISSN： 0032-0781
環境への適応と順化

彦坂幸毅

環境応答　187-195　2001
Publisher: 朝倉書店
Reproductive yield of an annual plant under elevated CO2 concentration

Kinugasa T, Hikosaka K, Hirose T

6th International Carbon Dioxide Conference, Extended abstract Vol.1　408-411　2001
Photoprotection of photosynthesis of Chenopodium album leaves grown at different irradiance and nitrogen nutrition

KATO Masaharu C., HIKOSAKA Kouki, HIROSE Tadaki

40　s119-s119　1999/03

ISSN： 0032-0781
植物の窒素利用

彦坂幸毅

植物の環境応答　160-170　1999
Publisher: 秀潤社
異なる光・栄養条件で生育した一年生草本シロザにおける光阻害感受性の解析

加藤真晴, 彦坂幸毅, 広瀬忠樹

日本植物学会大会研究発表記録 = Proceedings of the annual meeting of the Botanical Society of Japan　62　119　1998/09/01
常緑広葉樹シラカシにおける光合成の温度順化

彦坂幸毅, 村上綾子, 広瀬忠樹

日本植物学会大会研究発表記録 = Proceedings of the annual meeting of the Botanical Society of Japan　62　120-120　1998/09/01
葉はなぜ枯れるのか--葉の老化と順化

彦坂幸毅

科学　68　(1)　88-93　1998/01
Publisher: 岩波書店
ISSN： 0022-7625
IS LOW PHOTOSYNTHETIC RATE IN LEAVES OF EVER-GREEN TREES ATTRIBUTED TO LOW CONDUCTANCE FOR CO_2 DIFFUSION IN THE INTERCELLULAR SPACES?

TERASHIMA Ichiro, HIKOSAKA Kouki

37　40-40　1996/03

ISSN： 0032-0781
EFFECTS OF LIGHT, NUTRIENT AND AGE ON LEAF NITROGEN AND PHOTOSYNTHESIS

K HIKOSAKA, TERASHIMA, I, S KATOH

PHOTOSYNTHESIS RESEARCH　34　(1)　225-225　1992/10

ISSN： 0166-8595

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Books and Other Publications 12

植物の光合成・物質生産の測定とモデリング

彦坂幸毅

共立出版　2016/03

ISBN: 9784320057524
Canopy Photosynthesis: From Basics to Applications

Editors, Kouki Hikosaka, Ülo Niinemets, Niels PR Anten Chapter, Kouki Hikosaka, Ko Noguchi, Ichiro Terashima Chapter, Kouki Hikosaka, Tomo'omi Kumagai, Akihiko Ito

Springer　2016/01

ISBN: 9789401772914
Trees in a changing environment

Kouki Hikosaka, Yuko Yasumura, Onno Muller, Riichi Oguchi

Springer　2014/09

ISBN: 9789401790994
Weed biology

Kouki Hikosaka, Hisae Nagashima

朝倉書店　2014/03

ISBN: 9784254420418
Terrestrial ecosystems in a changing world

Kohyama T, Yoshioka T, Urabe J, Hikosaka K, Sugimoto A, Shibata H, Wada E

Springer-Verlag　2007
地球環境と生態系

彦坂幸毅, 武田博清, 占部城太郎

共立出版　2006/05/30
Plant ecology

朝倉書店　2004/12
Introduction to ecology

彦坂幸毅

東京化学同人　2004/08/26
Light, water and plant architecture

村岡裕由

文一総合出版　2003/05/10
Nitrogen utilisation and the photosynthetic system

Anten NPR, Hikosaka K, Hirose T

2000
Acclimation and senescence of leaves : their roles in canopy photosynthesis

HIKOSAKA Kouki

1993
Effects of light, nutrient and age on nitrogen content and photosynthesis of Leaves

HIKOSAKA Kouki

1992

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Presentations 22

Remote sensing of photosynthetic status using photochemical reflectance index (PRI) Invited

Kouki HIKOSAKA

2nd Asia-Oceania International Congress on Photosynthesis (AOICP)　2024/09/20
Remote sensing of photosynthesis and stress responses in leaves and vegetations.

Kouki Hikosaka

The 6th IBOC International Biology Conference 2023　2023/10/25
Remote sensing of photosynthesis and stress response in leaves and vegetations Invited

Kouki Hikosaka

The 2022 Northeast Asia Biodiversity Research Center Annual Meeting and International Symposium　2023/01/08
光化学系II光損傷速度のマンガン依存要素と過剰エネルギー要素の定量化の試み

彦坂幸毅, 李芷瑜, 横田鈴香, 上妻馨梨, 日出間純

日本植物学会第 86 回大会　2022/09/18
森林の炭素貯留速度決定機構の理解に向けて Invited

彦坂幸毅

日本生態学会第69回全国大会
光化学系IIの光損傷速度をマンガン依存要素と過剰エネルギー要素に分割して定量化する

彦坂幸毅, リズユ, 横田鈴香, 上妻馨梨, 日出間純

東北植物学会第11回大会
光阻害が起こった葉における光合成・クロロフィル蛍光・光化学反射指数(PRI)

彦坂幸毅

日本植物学会第84回大会
リモートセンシングパラメータと葉光合成速度の関係

彦坂幸毅, 辻本克斗

第68回日本生態学会大会
Remote sensing of photosynthesis Invited

Kouki Hikosaka

Astrobiology center symposium 2020　2020/12/21
Photosynthesis, chlorophyll fluorescence and photochemical reflection index under various conditions International-presentation

HIKOSAKA Kouki

Potsdam Greenhouse Gas Workshop. From Photosystems to Ecosystems　2017/10/24
Plant adaptation to elevated CO2: From natural variations to creation of adaptive plants International-presentation

Plant trait workshop　2016/05/09
Effects of warming on temperature dependence of photosynthesis of canopy leaves of deciduous forests International-presentation

The 2015 Tokyo Whole Plant Photosynthesis Workshop. Photosynthesis and Productivity in a Changing Environment　2015/05/15
Optimizing plant traits for maximizing plant production International-presentation

JST・CREST International Symposium“Productivity Improvement of Plants: From Model to Crop Plants”　2014/01/10
A game of leaf turnover and its consequence on canopy structure International-presentation

EFES 5th　2012/03/17
CO2 response of seed production and nitrogen use in C3 annual species International-presentation

Nitrogen 2010　2010/07/27
Variation in growth and its response to elevated CO2 among Arabidopsis thaliana ecotypes International-presentation

Oguchi R

International Conference on Arabidopsis Research　2010/06/06
Hikosaka K. Variation in photosynthetic capacity: How and Why International-presentation

JSPS colloquium "Green chemistry"　2009/05/24
Plant responses to global change: acclimation and evolution to a high-CO2 world International-presentation

ESF-JSPS Frontier Science Conference for Young Researchers 2006 -Climate Change-　2006/06/24
Leaf canopy as a dynamic system International-presentation

International Botanical Congress　2005/07
Photosynthetic acclimation International-presentation

13th International Congress of Photosynthesis　2004/09
Effects of elevated CO2 on even-aged monospecific stands of an annual, Chenopodium album International-presentation

Hikosaka K, Yamano T, Nagashima H, Hirose T

6th International Carbon Dioxide Conference　2001/10
Temperature acclimation of the photosynthetic apparatus in an evergreen shrub, Nerium oleander International-presentation

Hikosaka K, Hirose T

XIIth International Congress of Photosynthesis　2001/08

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Research Projects 41

Variations in photosynthetic traits Competitive

1998/01 - Present
Plant responses to global change Competitive

1997/01 - Present
Environmental response in photosynthesis Competitive

1989/04 - Present
Measurement and modeling of solar-induced chlorophyll fluorescence in tropical forest

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Hokkaido University

2022/04/01 - 2026/03/31
Support activities for establishing integrated biosphere science

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Transformative Research Areas (A)

Institution: National Institute for Environmental Studies

2021/09/10 - 2026/03/31
Prediction of forests that maximize carbon sequestration

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Transformative Research Areas (A)

Institution: Tohoku University

2021/09/10 - 2026/03/31
Analyses of mechanisms of the trade-off in altitudinal adaptation in relation to phenotypic plasticity

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2020/04/01 - 2023/03/31
Comprehensive analysis on the estimation potential of photosynthesis by solar induced chlorophyll fluorescence

Kato Tomomichi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Hokkaido University

2018/04/01 - 2021/03/31

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Solar-induced fluorescence (SIF) has been recognized to be a strong proxy to represent the photosynthesis at ecosystem-level simultaneously. To maximize the advantage of SIF, multiscale observations have been conducted, and discovered its behaviors under various environmental conditions, like as light condition. Additionally, the 3 dimensional radiative transfer model for SIF was developed and validated in field site. Those would give us a more chance to explorer the ecosystem level photosynthesis over wide area via SIF.
Cabon balance over Southeast Asian tropical forests

Kumagai Tomo'omi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Category: Grant-in-Aid for Scientific Research (A)

Institution: The University of Tokyo

2017/04/01 - 2021/03/31

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The original plan was to develop the forest inventory network with numerous plots over Southeast Asian tropical forests and conduct synthesized forest carbon balance analyses. However, we did not complete most of the plan because of the worldwide covid situation. Under such a situation, we (1) were successful in arranging some highland mixed forest plots in Vietnam, (2) clarified that the effects of illegal logging are critical in evaluating the total forest carbon balance in Myanmar, (3) suggested twice more total forest carbon stock than the previous estimation via revisiting the total Japanese forest inventory data, and (4) successfully developed an individual-based forest dynamics model, which can be applied for the global-scale simulation.
Does gene flow along environmental gradient inhibit adaptation? An approach using the optimality theory

Hikosaka Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2017/04/01 - 2020/03/31

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In different environments, selective pressures in each environment enhance adaptive differentiation, but gene flows from the different environment may inhibit evolution. Here, we tested whether gene flow along altitude inhibit adaptation to the respective altitude in Arabidopsis halleri. The growth analysis with optimization theory reveled that highland ecotype adapts to higher nitrogen conditions while lowland ecotype adapts to a wide range of nitrogen conditions. Genetic analysis showed that gene flow occurs but in some single nucleotide polymorphisms (SNP) there was a clear differentiation in allele frequency along altitude, probably as a result of strong selection. We conclude genetic differentiation occurs if environmental condition is very different between two subpopulations even when their distance was small.
A study of Assessment and Leadrership for teacher education based on Asian Erasmus Mundus

ARIMOTO MASAHIRO, Clark Ian

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Category: Grant-in-Aid for Scientific Research (A)

Institution: Tohoku University

2013/04/01 - 2018/03/31

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This research aims to guarantee the quality of teacher training, with the theme of "stand on the perspective of Asian Erasmus Mundus", "for teacher training", "assessment and leadership", as a viewpoint of the Asian joint degree program He stood up and settled its foundation in the field of assessment and leadership which is the concept of European origin and made it the future turning point. I was able to appeal to a great presence in the meeting among the participants from anglo saxon countries. Due to the unique educational culture in Japan, we were able to visualize the conceptual framework which means participation in the Community of Practices, while sitting at the same table as the West of "assessment & evaluation".
Principles underlying the diversity of plant traits(Fostering Joint International Research)

Onoda Yusuke, Wright Ian J., Westoby Mark, Anten Niels P. R., Stacy Elizabeth, Ostertag Rebecca, KITAYAMA Kanehiro, KITAJIMA Kaoru, ISAGI Yuji, IZUNO Ayako, KUROKAWA Hiroko, AIBA Masahiro, HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)

Institution: Kyoto University

2015 - 2017

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This project had three subjects. (1) The mechanisms underlying the tradeoff between leaf photosynthetic efficiency and leaf longevity, (2) the cost-and-benefit related to tree height, and (3) eco-evolutionary study on phenotypic diversity of Metrosideros polymorpha. The following achievements were made: (1) we made a novel data compilation incorporating rarely considered traits such as cell walls, nitrogen allocation and mesophyll CO2 diffusion, and clarified the general mechanisms underlying the tradeoff between leaf photosynthetic efficiency and leaf longevity. (2) We have made a new concept to understand how light competition drives forest structure. (3) We established 52 study sites over the island of Hawaii and did intensive trait measurements for more than 2000 individuals to get insights how phenotypic diversity has been formed and maintained over the island.
The role of temperature adaptation in invasive species under climate change.

Kouki Hikosaka, Morinaga Shinichi, Oguchi Riichi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2013/04/01 - 2016/03/31

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We sampled seeds of an invasive species Cardamine hirsuta, which has invaded these four decades and spread in Japan, and those of a native species Cardamine scutata from two latitudinal gradients in East Japan. We studied genetic structure of populations and freezing tolerance. C. hirsuta populations were divided into four groups, suggesting that C. hirsute has invaded at least four times. Freezing tolerance was different between populations, which was correlated with minimum temperature. These results suggest that functional genetic differentiation has been occurred even in species that had invaded recently.
Leaf dynamics: leaf mean residence time and photosynthetic efficiency

Hirose Tadaki, HIKOSAKA Kouki, OIKAWA Shimpei

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2013/04/01 - 2016/03/31

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We studied leaf dynamics with respect to mean residence time and photosynthetic efficiency using cockleburs and rice. Cockleburs were grown at two densities and the effects on leaf dynamics of light gradient within a canopy and of nitrogen sink strength were studied. Light gradient was stronger in a dense stand due to mutual shading, while nitrogen sink strength was stronger in an open stand due to higher branching and reproductive activities. Nitrogen use efficiency (NUE) in rice plants was analyzed at leaf, shoot, and whole-plant level, with factorization into nitrogen productivity (NP) and mean residence time (MRT). No significant difference was found in MRT and harvest index between rice and wild annuals. The high NUE in rice was ascribed solely to its high NP. Because of high opportunity costs of reducing NP, MRT may not be increased further in rice. By contrast, high NUE in perennials was due to high MRT. Their NP was as low as wild annuals'.
An attempt to quantify the degree of interaction in light interception between canopy trees in a forest

Kouki Hikosaka, HIURA Tsutom, NAKAJI Tatsuro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

Category: Grant-in-Aid for Challenging Exploratory Research

Institution: Tohoku University

2013/04/01 - 2016/03/31

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In forests, distances between individual canopy trees are large and it is unclear the degree of interaction between individuals for light competition. In the present study, we evaluated the degree of interaction, which was defined as the fraction of light that penetrated through the foliage of neighbor individuals, using two methods. The results suggest that the degree of interaction in a forest is about 0.5, indicating there is a significant interaction in light interception between neighbors. This value is useful for modeling of game in light competition in forests, contributing to projection of CO2 absorption rate in future forests.
Modeling of CO2 response of plant functions

HIROSE Tadaki, HIKOSAKA Kouki, KINUGASA Toshihiko, FUJII Nobuharu

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

Category: Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

2009/07/23 - 2014/03/31

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44 ecotypes of Arabidopsis thaliana were grown at two CO2 levels. We found that there was a large variation in CO2 response of growth rates among the ecotypes. The variation in photosynthetic nitrogen use efficiency was the main cause of the variation in the growth rates. 5 pairs of deciduous and evergreen woody species were grown at two CO2 levels. We found that CO2 responses of growth and photosynthesis were not significantly different among deciduous and evergreen plants. We studied leaf and nitrogen dynamics in rice canopy grown under the field CO2 enrichment experiment. We found that nitrogen availability significantly affected leaf and nitrogen dynamics whereas elevated CO2 did not. We constructed a new model of leaf dynamics in a leaf canopy introducing a game theory. The model successfully predicted environmental response of canopy structure, including CO2 responses.
A study of plant adaptation to elevated CO2 using CO2 springs as a future ecosystem

HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (S)

Category: Grant-in-Aid for Young Scientists (S)

Institution: Tohoku University

2008 - 2012

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We raised a question whether plants exhibit evolutionaryadaptation to elevated CO_2. We studied plants from natural CO_2 springs, where plantshave been exposed to elevated CO_2 over generation. We found that plants from high CO2area around CO_2 springs have smaller stomata, low maximal stomatal conductance, lowphotosynthetic rates at low CO_2, and higher leaf to root ratio. A meta analysis revealed thatsuch differences are common across different CO2 springs irrespective of species.Competition experiment demonstrated that plants from high CO_2 area are morecompetitive at elevated CO_2. These results suggest that plants evolutionarily adapt toelevated CO_2 conditions.
Elucidation of geographical differentiation of cool-temperate forest ecosystem function using large scale experiments and geographical environmental gradients

HIURA Tsutom, MURAOKA Hiroyuki, SAIGUSA Nobuko, SUYAMA Yoshihisa, HIKOSAKA Khoki, UTSUMI Yasuhiro, SANO Zyunji, NAKAJI Tatsuro, NAKAMURA Masahiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

Category: Grant-in-Aid for Scientific Research (A)

Institution: Hokkaido University

2009 - 2011

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We clarified the physiological response of producers to the geographical environment gradient, and food chains in cool temperate forests, for major component species (beech, oak, birch) of forest communities on the basis of genetic variation. In order to clarify the response of forest ecosystems against global warming cool-temperate zone, we estimated the productivity, nutrient cycling and biodiversity of the forest ecosystems by using artificial global warming.
PLANT ARCHITECTURE : TRADE-OFF BETWEEN GROWTH AND MECHANICAL STABILITY

HIROSE Tadaki, HIKOSAKA Kouki, KINUGASA Toshihiko, NAGASIMA Hisae

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tokyo University of Agriculture

2008 - 2011

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We studied the effect of planting density on plant architecture with particular attention to growth and mechanical strength of metamers. Crowded plants elongated their stem at the expense of mechanical stability. On the other hand, uncrowded plants reduced elongation and increased light interception by lateral extension of branches. Nitrogen use efficiency was higher in uncrowded plants, whereas light use efficiency was higher in crowded plants. Yang's modulus of elasticity increased with increasing dry mass density of stem. Stems of crowded plants had a lower dry mass density, but Yang's modulus per dry mass density was higher. However, they increased stem height to the limit of lodging.
"未来の生態系"天然二酸化炭素噴出地における植物の適応プロセスの解明

彦坂幸毅, 河田雅圭

Offer Organization: 日本学術振興会

System: 科学研究費助成事業基盤研究(B)

Category: 基盤研究(B)

Institution: 東北大学

2007 - 2009

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丹生CO2噴出地由来のオオバコから自殖種子を得て、実験圃場のオープントップチャンバーを用いて競争実験を行った。この競争実験では、高CO2領域由来の個体と低CO2領域由来の個体を隣接させ、どちらが個体サイズや種子繁殖量を多くすることができるかを解析した。低CO2条件では両者に有意な違いは認められなかったが、高CO2条件では低CO2由来の個体のほうが多く種子を残すという結果が得られた。本研究で用いた条件では高CO2由来の個体が高CO2条件で適応的であるとの証拠は得られなかった。さらに、青森県湯ノ川、山形県朝日鉱泉、富山県林道の高・低CO2領域からオオバコ種子を採取し、実験圃場のオープントップチャンバーにて成長実験を行っている。月に一度刈り取りを行い、個体重・窒素量の測定及び光合成測定を行う予定であるが、実験は継続中であり結果はまだ出ていない。このほか、高CO2環境下での群落のCO2収支の研究を行い、論文を投稿した。これは現在Plant Ecology誌に受理見込みである。さらにCO2噴出地の植物を用いた研究の論文をいくつか投稿中である。
Ecosystem functions and responses to the environmental condition based on the geographic variation of Fagus crenata in cool-temperate forests

HIURA Tsutomu, SUYAMA Yoshihisa, HIKOSAKA Khoki, KUMAGAI Tomoomi, UTSUMI Yasuhiro, SUYAMA Yoshihisa, HIKOSAKA Khoki, KUMAGAI Tomoomi, UTSUMI Yasuhiro

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Hokkaido University

2007 - 2008
電熱線大規模埋設実験による落葉広葉樹林生態系の温暖化に対する応答の解明

日浦勉, 工藤岳, 笠原康裕, 彦坂幸毅

Offer Organization: 日本学術振興会

System: 科学研究費助成事業萌芽研究

Category: 萌芽研究

Institution: 北海道大学

2007 - 2008

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1、ミズナラの最大光合成速度は温暖化処理によって変化しなかったが、窒素含量は低下したため窒素利用効率は上昇した。イオン交換樹脂法によって土壌中の無機体窒素量がどのように変化したかは現3定量中である。 2、葉中の窒素含量の低下と硬さの指標が上昇したため、植食性昆虫による食害は低下した。 3、ミズナラの堅果生産量は枝の温暖化処理によって3〜5倍に上昇した。そのメカニズムは今のところ不明である。 4、土壌中のバクテリアの量や組成は2年間の実験では変化が見られなかった。 5、林床植物の総植被率は、林冠閉鎖が完了する6月中旬に最大となり、その後低い値で安定する傾向が見られた。林床に到達する光エネルギーとの対応関係が示された。夏緑性植物の地上部生育開始時期は、温暖化により早まる傾向が見られたが、その程度は種により異なっていた。一方で、秋の生育終了時期には明瞭な違いが認められなかった。すなわち、生育初期に温暖化の効果が大きいことが示された。半常緑性植物のオシダの越冬葉は、温暖区ではほとんどが冬の間に枯死していた。これは、温暖区では積雪がほとんどないため凍害による損傷が強かったためと考えられた。さらに、当年シュートの伸長は温暖区で遅くなる傾向が見られた。越冬葉の損失により、新葉生産のための養分や資源転流がなくなったことが影響していると予測される。土壌温暖化による積雪環境の変化は、冬期の越冬環境を変化させ、植物の生育にマイナスの効果をもたらす可能性が示唆された。以上の結果より、温暖化が植物にもたらす影響は、種や生活形により多様であることが示された。温暖化の影響予想には、個々の植物が有する生理特性を考慮する重要性が示された。
Interspecific difference in nitrogen absorption ability of roots as a cause of variation in plant growth rate

OSONE Yoko, HIKOSAKA Kouki, ISHIDA Atsushi

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)

Category: Grant-in-Aid for Young Scientists (B)

Institution: International Christian University

2006 - 2008
常緑広葉樹の分布を説明する機能・機構の研究

彦坂幸毅, MULLER Onno

Offer Organization: 日本学術振興会

System: 科学研究費助成事業特別研究員奨励費

Category: 特別研究員奨励費

Institution: 東北大学

2005 - 2007

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植物の分布がどのように決まっているかを理解すること、また、来る温暖化に対して植物がどのように応答するかを予測することを目的とし、主として常緑広葉低木アオキの生理生態および個体群動態を調査した。 1)東北大学実験圃場にてアオキを育成し、光合成特性および葉の解剖学的特性の季節変化を調べた。アオキは冬に窒素含量や葉緑体体積が大きくなり、葉緑体を収容できるようにあらかじめ厚い葉を作っていることが明らかとなった。論文をまとめ、現在改訂稿が査読されている。 2)異なる温度環境に育成するアオキが遺伝的に異なる性質を持っているか否かを調べるため、熊本と宮城にてアオキ実生を採取し、東北大学圃場と熊本県立大学のそれぞれにおいて熊本エコタイプと宮城エコタイプを同時に育成した。光合成能力や窒素含量の季節変化は両エコタイプで異なり、遺伝的な分化が起こっていることが明らかとなった。 3)熊本県水俣市の照葉樹林にてアオキ実生の微地形分布を調べ、アオキが斜面に多く分布していることなどを明らかにした。論文をまとめ、現在改訂稿が査読されている。 4)常緑広葉樹の葉のルビスコ量が冬に増加する理由の仮説としてルビスコが貯蔵タンパク質として蓄積されているという説が出されていた(Warren and Adams 2004)。この仮説を検証するため、約10種の常緑種の葉のルビスコ活性を2月と9月に測定した。その結果ルビスコ活性化率は夏と冬で大きな違いはなく、冬のルビスコは単なる貯蔵ではないことが示唆された。 5)この他、オオバコやブナの地理変異についても調査を行った。結果は現在解析中である。
Costs and benefits in branching and the mechanical stability of plants

HIROSE Tadaki, IRIE Mami, NAGASHIMA Hisae, HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tokyo University of Agriculture

2005 - 2007

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Plant architecture is gross morphology pertaining to light interception and mechanical stability of plants. We aimed to test the hypothesis that plants develop their leaves to efficiently intercept light in a given environment. Plants were grown solitarily or in dense stands to have different light climates. In the first two years, we conducted an experiment using an annual Chenopodium album. We described the architecture of solitary and dense-stand plants and analyzed their growth. From leaf area distribution, we calculated light interception of the plants. To describe plant architecture, we used phytomers, a unit of plant growth each composed of an internode, petiole and leaf blade. Differences in branching pattern and resource use between solitary and dense-stand plants were analyzed. Dense-stand plants were thinner and taller than solitary plants. Solitary plants produced more and longer branches. Dense-plants grew taller at the expense of mechanical stability. Light use efficiency was higher and nitrogen use efficiency was lower in dense-stand plants than solitary plants. From the second year, we used another annual species Xanthium canadense to identify factors involved in extension growth and in mechanical stability of plants. We measured the elastic modulus and breaking stress of internodes and found that both were lower in solitary than dense-stand plants but that the safety factor against buckling was larger in solitary plants due to their lower statue. There were positive correlations between elastic modulus, breaking stress and dry mass density of internodes, but the regressions were significantly different between solitary and dense-stand plants. Relationships between the relative elongation rate and water content of internodes were analyzed. There was a strong correlation between water content and dry mass density of internodes. This relationship was derived with a simple model that includes density of dry mass and fraction of air space as parameters.
"未来の生態系"天然二酸化炭素噴出地における植物の適応と進化

彦坂幸毅

Offer Organization: 日本学術振興会

System: 科学研究費助成事業若手研究(A)

Category: 若手研究(A)

Institution: 東北大学

2004 - 2006

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龍神沼、湯ノ川、丹生周辺の三つのCO2噴出地において環境測定、植生調査および生育植物の生理生態学的調査を行い、高二酸化炭素環境が葉の性質に影響していること、また、その影響が種によって異なることを報告した(Onoda et al. 2007)。高二酸化炭素環境への適応を調べるため、現地の植物を東北大学実験圃場にあるオープントップチャンバーに移植し、植物の生理生態学的性質を調査した。小野田は龍神沼と湯ノ川からオオイタドリを、丹生からオオバコを移植し、光合成特性を比較した。その結果、湯ノ川から移植したオオイタドリの気孔コンダクタンスが対照区から移植した個体に比べ有意に低いこと、丹生のオオバコのデンプン蓄積濃度が低いことを見いだした。さらに大学院生中村伊都が個体成長について詳細な解析を行った。高二酸化炭素領域由来の個体はバイオマスを地上部に多く投資し個体重あたりの葉面積が大きいこと、好適栄養条件では成長速度が高いことなど多くの特性に違いがあることを発見した。丹生のオオバコについては、東北大学生命科学研究科河田雅圭教授のグループの助けを得て遺伝学的解析に着手した。マイクロサテライトマーカーを用いた解析の結果、高二酸化炭素領域のオオバコと低二酸化炭素領域のオオバコの間では比較的遺伝的距離が離れていることを発見した。高二酸化炭素領域のオオバコはヘテロ接合度頻度が低く、繁殖様式が遺伝的分化に影響していることが示唆された。これらの結果から、我々は丹生の高二酸化炭素領域のオオバコが通常領域のオオバコとは異なる遺伝的性質をもつこと、つまり何らかの進化が起こっていることを明らかにしたといえる。
地球環境変化のもとで起こる植物進化の実験的シミュレーション

彦坂幸毅, 酒井聡樹

Offer Organization: 日本学術振興会

System: 科学研究費助成事業萌芽研究

Category: 萌芽研究

2003 - 2005

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大気CO2濃度上昇が植物の光合成、成長、繁殖機能に与える影響、植物の進化応答機構を明らかにすることを目的に研究を行った。植物進化の研究に有用と思われるCO2スプリングを4ヶ所発見し、そのうち一つ(八甲田山)について現地のCO2環境と植生記載を行った。とくに7種については,CO2濃度に伴う被度の変化を調べた。ミノボロスゲ,バッコヤナギはCO2スプリングに多く,チシマザサはコントロール地点に多かった。このことは,種によってCO2応答が異なること,CO2が上昇すると植生が変化することを示している(Onoda et al. 2005)。他の3つのCO2スプリングについても現地のCO2濃度などの環境測定および現地に生育している植物の光合成特性を測定した(Onoda et al.投稿中a)。現地から採取した植物(オオバコ・オオイタドリ)を実験圃場にて育成し、光合成特性を比較した(Onoda et al.投稿中b)。2004年度に山形県湯殿山のCO2スプリング周辺と付近のコントロール地点から採取したオオバコ個体を実験圃場の高CO2・低CO2環境の二つの環境で水耕栽培にて育成し、非破壊的に成長を追跡した。相対成長速度を指標とし、各地点・各生育CO2濃度における上位3個体から自殖種子を回収し、2005年に同様の育成実験を行った。採取した時点(2004年の実験)ではCO2スプリング由来個体の相対成長速度が高かったが、選抜個体の子供世代では、由来間の違いはほとんどなくなっていた。このことは、CO2スプリング、コントロールの両地点の集団に潜在的に相対成長速度が高い個体が存在していることを示唆する。
Application of canopy photosythesis models to the analysis of leaf phenology

HIROSE Tadaki, HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2002 - 2004

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The lifespan of leaves is shorter than that of individuals, and plants produce and shed their leaves in the growth period. The pattern of leaf production and shedding is different among species as is represented in evergreen and deciduous species. We considered difference in leaf phenology as a strategy of plants to adapt themselves to changing environments. Applying a canopy photosynthesis model to the analysis of leaf phenology, we developed a new model of leaf dynamics and nitrogen. The model predicted optimal LAI, canopy photosynthesis, leaf lifespan, nitrogen use efficiency, and also their responses to changes in nitrogen and light availability. In experimentally established herbaceous stands, we analysed the factors responsible for leaf production and shedding. Leaf area loss rate increased in shaded leaves with an increase in N retranslocation to meet the N demand for growth of the plant. We demonstrated that leaves were discarded Oven though maintaining those leaves longer would contribute to plant growth at low N availability, while at high N availability leaves were not discarded even though retranslocation of N associated with leaf loss would increase total plant growth rate. In a beech forest, we found that canopy and understorey tree species had a similar N resorption rate that did not depend on the light availability. In the same forest, we found that leaf level N use efficiency was not significantly different between canopy and understorey species, though the mechanism was very different from each other. Canopy species had a high N productivity with a low mean residence time of N, while understorey species had a high residence time of N with a low N productivity. We studied responses of leaf photosynthesis to environmental changes. Availability of vacant space in mesophyll cell surfaces to accomodate enlarged chloroplasts is indispensable to positively respond to sudden increase in light climate.
Scaling up of the physiology^based response of cool-temperate forest ecosystems to disturbance and environmental change.

KOHYAMA Takashi, HIURA Tsutomu, PSAKI Mitsuru, KOIKE Takayoshi, HIKOSAKA Koki, TAKENAKA Akio

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (A)

Institution: Hokkaido University

2001 - 2003

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This project aimed to describe the overall mechanism at forest ecosystem scale response to global change. Setting mixed cool-temperate deciduous broad-leaved forests as main target ecosystem, we scaled up from organ-based physiological processes to a whole individual growth and community dynamics used quantitative theoretical models based on field observation. Experiments were carried out at various scales ; e.g. open-top CO_2 enrichment systems on experimental field to fertilization/logging experiment on forest ecosystem. At every scale physiological response to treatment or disturbance was species specific. We described the differential response cascade explaining species difference. Physiology-based model of foliage photosynthesis was extended to include nitrogen-limitation. Shoot-module-based analysis of three-dimensional tree formation processes was carried out using Magnolia obovata and the genus Abies as model trees. We extracted branching role of M.obovata. Short-shoot type lateral branches were commonly formed, of which significance, clarified through simulation experiments, was not to reduce mutual shading but to reduce assimilate use due to the overall shortage of photosynthetic production. Population-level development of Abies stands was simulated using PipeTree, a shoot-based, physiological simulator. The simulation suggested that single shoot characteristics need to be changed with height, through water potential change, so that observed phenomena of even-aged population development.
Photosynthetic nitrogen use efficiency of species distributed in different temperative regimas.

HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2001 - 2002

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Nitrogen is a limiting factor of plant growth in many ecosystems. Efficient utilisation of nitrogen is of importance for fitness of plants. In this study I investigated nitrogen use in photosynthesis of various plant species that distribute different temperature regime along latitufdinal and/or altitudinal gratidents. Hikosaka et al. (2002) studied plants growing in different altitudes of Mount Kinabalu (4095m asl), Malaysia and found photosynthetic nitrogen use efficiency (PNUE) is lower in speceis growing at higher altitudes. Yasumnura et al. (2002) studied nitrogen use efficiency (NUE) of plants coexisting in a cooltemperate forest and found that coexisting species have similar NUE but the components of NUE, nitrogen productivity and mean residense time of nitrogen, were different between canopy and understorey species. Kato et al. (2002a, b, 2003) established method to study photoinhibition and photoprotection of leaves. Tsonev and Hikosaka (submitted) studied temperature dependence of photoinhibition and photoprotection in an annual Chenopodium album. Hikosaka (2003) constructed a model of leaf turnover in a leaf canopy and studied effects of difference in PNUE on structure, productivity, and nitrogen use in leaf canopy.
Effects of climate and nomadic activities on the development of grassland vegetation in Mongolia

HIROSE Tadaki, HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

2000 - 2002

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Mongolian grasslands have been under strong influence of the traditional nomadic activities. We studied how the structure and function of grassland vegetation are influenced by the climate and nomadic activities. In June 1999 we established exclosures with a dimension of100 x 100 m to exclude grazing effects of livestock in mesic (Partizan), typical(Tumentsogt) and dry(Bayan-Unjuul) steppe zone. Inside and outside of the exclosure, ten permanent quadrats were set at each study site. We described species structure of vegetation in the permanent quadrats and harvested plant samples from four 0.5 x 0.5 m quadrates inside and outside of the exclosure in summer (July - August) of 1 999 through 2002. The number of species appeared in an area of 1 m^2 in 1999 was 45 at Partizan, 46 at Tumentsogt and 18 at Bayan-Unjuul. There was no significant difference in the species composition and aboveground plant biomass between inside and outside of the exclosure in 1999. Species-Area curves indicated that species number nearly saturated at 2 m^2 both at Tumentsogt and Bayan-Unjuul, while it was still increasing at Partizan reflecting its higher species diversity. Although the species composition in 2002 was not different from that in 1999, aboveground biomass and the leaf area index were higher in the exclosure than the outside grazing zone. Reduction in soil evaporation due to litter accumulation as well as exclusion of livestock grazing were probably responsible for the higher aboveground growth in the exclosure. Species composition changed with climate. Proportion of gramineae in the aboveground biomass increased and overall species diversity decreased with Bowing of precipitation. There were year-to-year variations in biomass and species composition probably owing to different summer precipitation.
EFFECTS OF ENVIRONMENTAL GRADIENTS ON PLANT-HERBIVORE SYSTEMS OF WOODY PLANTS BELONGING TO THE FAGACEAE FAMILY

KAMATA Naoto, HIKOSAKA Kouki, WADA Naoya

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Kanazawa University

2000 - 2002

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Induced defense of plants, increase in fenolics and decrease in nitrogen following herbivory, is a widely recognized phenomenon in various plants. Influence of environmental clines on constitutive and induced defense of four species of Fagaceae species were studied. We tested a hypothesis that altitudinal-dependent outbreaks of the folivorous insects were caused by foliage properties in relation to environment clines along with altitude. Our results suggest that the foliage quality is one of the possible causes of site-dependent outbreaks of S. punctatella: During an increasing period, high quality food at outbreak sites promotes population growth of this insect. When beech trees suffer heavy defoliation in the non-outbreak areas, foliage quality deteriorates, which slows down S. punctatella population growth. In contrast, in outbreak areas, quality increases in the year following heavy defoliation, and this may promote population growth and outbreaks. A positive feedback process thus may operate among nutrient cycling, foliage quality and insect population growth. A fertilizing effect from herbivory was a proximate factor causing higher soil nitrogen availability in the outbreak area. Results of our experiment suggested that the amount of defensive compounds was controlled by the carbon-nutrient balance at a leaf level. The C/N balance is an important factor for biomass allocation and chemical defense. However, the effect of defoliation on the C/N balance in a plant is variable between species, probably leading to a species variability in herbivory responses.
Trade-off in resource allocation

SAKAI Satoko, HAKOYAMA Yuko, SAKAI Koki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (C)

Institution: Tohoku University

2000 - 2001

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To explain the general tendency of large mothers to produce large offspring, we developed two models in which either the rate at which each single offspring extracts resources from the mother or the rate at which the mother supplies resources to all the offspring is limited (terminal- or upper-stream-limitation on resource transport, respectively). We also reanalyzed the data of Erythronium japonicum (Sakai 1998) to test the models. The terminal-stream-limitation model predicted that the optimal offspring size that maximizes the fitness of the mother increases with an increase in the maximum rate of resource extraction by each single offspring. Thus, large mothers produce large offspring if the maximum resource extraction rate is high in those mothers. The upper-stream-limitation model predicted that the optimal offspring size decreases with an increase in the maximum rate of resource supply by the mother to all the offspring. In E. japonicum, the maximum growth rate of a seed was independent of the number of seeds of a plant, suggesting that the resource extraction rate is limited at the individual seed level. The maximum growth rate was high in large plants and had a strong positive effect on final seed mass. Thus, the results were consistent with the terminal-stream-limitation model.
CO_2濃度上昇に対する個葉レベルの応答からのスケールアップ

広瀬忠樹, 彦坂幸毅

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 特定領域研究(B)

Institution: 東北大学

1999 - 2001

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植物の成長:植物遷移の初期に侵入するイタドリの高CO_2濃度に対する成長の応答を調べ,Hirose(1987)のモデルにより解析した.またオオオナモミを用い,繁殖成長が植物の栄養成長にフィードバックする機構を明らかにした.植物の繁殖収量は繁殖期間の長さ・その間の光合成速度・光合成産物の分配速度によって決まるので,それぞれの要因に対する気温上昇の影響を解析することにより収量決定のメカニズムを明らかにした. 葉の光合成:葉の光合成は,葉緑体でRuBPを炭酸化する過程(CO_2+RuBP→2PGA)と光エネルギーを用いてRuBPを再生する過程(電子伝達系)のいずれかにより律速されていることが知られている.Hikosaka(1995,1997,1998)のモデルを用いて,オープントップチャンバー内で異なるCO_2濃度,気温条件で育成した植物(シロザ,シラカシなど)の葉の光合成系を,両過程への窒素の分配に着目して解析した(高速液体クロマトグラフ糖分析システムを使用). 個葉レベルの応答からのスケールアップ:CO_2上昇が個葉光合成に与える影響から,個体の栄養成長・繁殖成長に与える影響,植物群集の生産構造・個体サイズ構造に与える影響へとそれぞれのモデル化を介してスケールアップし,結果を森林生態系の構造と炭素バランスがどのように変化するかを予測するために適用し,陸域生態系の地球環境変化に対する応答機構を明らかにした.
異なる気候帯に生育する植物の光合成系の温度応答

彦坂幸毅

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 奨励研究(A)

Institution: 東北大学

1999 - 2000

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異なる気候帯に生育する植物の温度応答・窒素利用について様々な解析を行った。 ○中間温帯である宮城県仙台市において常緑広葉樹アオキとヤブコウジの光合成特性の季節変化を追跡した。この結果、光合成特性の季節変化には光環境の変化よりも気温の変化の影響のほうが大きいことを明らかにした。 ○暖温帯である千葉県東京大学千葉演習林にて常緑広葉樹8種の光合成特性を比較した。同一地域に生育する植物では光合成特性の違いが小さいことを明らかにした。 ○地中海性気候に生育するキョウチクトウを異なる温度で育成し、その温度応答を調べた。低温で育成した植物では光合成の鍵酵素であるRuBPCaseの活性が相対的に低下していることを明らかにした。さらに酵素活性に関わるパラメータを調べた。二酸化炭素補償点および葉内二酸化炭素濃度には違いがないという結果を得た。
Determinants of the reproductive yield of competing plants in a stand

HIROSE Tadaki, HARADA Yuko, HIKOSAKA Kouki, SAKAI Satoki, HIKOSAKA Hisae

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B).

Institution: Tohoku University

1999 - 2000

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We studied the effect of CO_2 elevation on the reproductive yield of Xanthium canadense. Although the plant growth and total reproductive yield (seeds plus capsules) increased with CO_2 elevation, seed production did not increase. Analysing N use in plant growth, we found retranslocation of N from leaves to seeds was retarded at high CO_2 due to increased longevity of leaves and low temperature. Translocation was lowered by lower air temperature at later growing season. Thus seed production was constrained by the availability of N. We developed a new method to separate the effect of self-shading from that of shading from neighbors and applied it to stands of Xanthium canadense established with different densities. We estimated (1) the intensity of shading for plants in the stand and (2) self-shading for plants isolated from the stand. Shading from neighbors was estimated as a subtraction of (2) from (1). We found that the interaction among individuals was strong in a stand and that the intensity increased with increasing plant densities. From an analysis of trade-off between size and number in seed production, we proposed a sink-limiting growth model, where contraints in the absorption rate of resources from mother plants were assumed with a loss of resources due to maintenance respiration. This model predicts that seed size does not increase reciprocally to the reduction in seed number. This is because an efficiency in using storage substance decreases with a smaller number of seeds and thus benefits increasing seed number at the expense of seed size. The optimal seed size is smaller than that predicted by Smith and Fretwell.
Analysis of Canopy Structure of Plant Communities in Mongolian Grasslands

HIROSE Tadaki, HIKOSAKA Kouki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B).

Institution: TOHOKU UNIVERSITY

1997 - 1999

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We studied the nitrogen use efficiency (NUE) and water use efficiency (WUE) of species growing in a humidity gradient in Mongolian grasslands to examine if there is a trade-off between the two efficiencies. Total 131 species were collected from 7 sites. WUE was evaluated by the compositional deviation of ィイD113ィエD1C(δィイD113ィエD1C). NUE was evaluated as a reciprocal of leaf nitrogen concentration (LNC). Species in drier habitats tended to have higher WUE, but there was no such trend in NUE. No trade-off was found between WUE and NUE across species distributed in different climates. However, when the values for WUE and NUE were standardized against their means for species found more than three sites, WUE increased and NUE decreased with increasing aridity, indicating the trade-off between NUE and WUE within species. Only two (Cleistogenes squarrosa and Salsola passerina) out of 131 species were found to have the C4 metabolism. Effects of climate and grazing intensities on the structure of grassland vegetation were studied. We have established three exclosures in different climates : Partizan (mesic steppe), Tumentsogt (typical steppe) and Bayan-Unjuul (dry steppe). First year vegetation survey gave 45 species (including 7 grasses) in Partizan, 46 species (8 grasses) in Tumentsogt and 18 species (4 grasses) in Bayan-Unjuul. Aboveground biomass was 122 g dw mィイD2-2ィエD2 at Parizan, 122 at Tumentsogt, and 53 at Bayan-Unjuul. Difference between exclosure and grazing plots was small, probably because of the short time since establishment of the exclosure and an unusually dry summer in 1999.
落葉樹葉と常緑樹葉の光合成特性の比較生理生態

彦坂幸毅

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 奨励研究(A)

Institution: 東北大学

1997 - 1998

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落葉樹葉と常緑樹葉の光合成特性について、以下の解析を行った。 1) 常緑広葉樹シラカシと一年生草本シロザの光合成の窒素利用効率(PNUE、光合成速度/窒素比)を解析した。シラカシのPNUEはシロザの半分であるが、これは、葉緑体内のCO2濃度が低いことと、窒素あたりの光合成系酵素(RuBPCase)量が少ないこと、RuBPCaseの比活性が低いことに起因した。それぞれの寄与は小さかったが、積み重なることによってPNUEの大きな違いをもたらした。この結果はFunctional Ecology誌に発表した(Hikosaka,Hanba,Hirose&Terashima 1998)。 2) 常緑広葉樹アラカシ・マテバシイ・ヤブツバキと落葉広葉樹シラカンバ・クヌギのPNUEを比較した。落葉樹はPNUEが高かったが、シラカンバでは窒素あたりのRuBPCase量が高く、クヌギでは葉緑体CO2濃度が高かった。ヤブツバキは窒素あたりのRuBPCase量も葉緑体CO2濃度も低かった。 3) シラカシの光合成の温度順化について解析を行った。異なる温度で育てると光合成の温度依存性が変化することが知られている。この生理学的なメカニズムを調べ、二つの部分反応(RuBPの炭酸同化反応と再生反応)のバランスの変化によって光合成の温度依存性が変化することを明らかにした(Hikosaka,Murakami&Hirose,in press)
Competition and coexistence in plant community in relation to strategy of resource us

HIROSE Tadaki, HIKOSAKA Kohki, SAKAI Satoki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for Scientific Research (B)

Institution: Tohoku University

1996 - 1997

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A plant community consists of individuals and species which are different in size from each other. We studied how those individuals and species acquire and use limiting resources in the community to elucidate the mechanism of competition and coexistence among species and individuals. In the Miscanthus sinensis grassland meadow at Kawatabi, Miscanthus dominated upper layrs of the canopy, while many smaller subordinate species such as Potentila and Lysimachia coexisted in the understory. Although those subordinate understory species absorbed much smaller amounts of PPFD than dominant Miscanthus, they have larger leaf area relative to aboveground biomass and consequently the PPFD absorbed per unit aboveground biomass was closer to that of Miscanthus. This suggests that a similar efficiency of light acquisition per unit investment of aboveground biomass is a necessary condition for species coexistence in a plant community. We studied a natural stand of Xanthium canadense at the shore of Lake Kamahusa as a competition system. Tall individuals were in the upper layr and absorbed large amounts of available PPFD.Difference in the leaf area ratio between individuals in upper and lower layrs was limited and consequently the efficiency of light acquisition of the individuals in the upper layr was still larger than that in the lower layr individuals. This made a strong contrast against the coexistence system given above. From a comparison between stands different in the growth stage, it was shown that plant height and light climate controlled leaf area development of individuals. We further studied photosynthetic characteristics of leaves in a canopy established experimentally at two nitrogen availabilities. Leaf nitrogen concentration tended to be higher in leaves of plants in lower layrs when compared at a common light climate. However, nitrogen use in leaf photosynthesis depended solely on the light climate of the leaf. We developed optimal-allocation models to investigate bet-hedging on ovule production as an evolutionary strategy in environments where either pollinator availability or resource availability is unpredictable. We showed that large variability in pollinator or resource availability does not always select for an increase in the number of ovules produced by the plant. Rather, the plant decreases its I ovule number in habitats where pollinator or resource availability is more variable. To explain female-biased sexual allocation in cosexual plants, we developed a game theoretic model incorporating a source-sink relationship of flower/fruit growth. In this model, flower/fruit growth rate is either limited by its sink strength (the product of its potential relative growth rate and absolute size) or by the source strength (instantaneous amount of resources available) of the plant. We showed that female-biased sexual allocation is evolutionarily stable if fruit growth is sink-limited at least in the early stage of its growth.
葉の寿命と光合成特性の関係の生理生態学的解析

彦坂幸毅

Offer Organization: 日本学術振興会

System: 科学研究費助成事業

Category: 奨励研究(A)

Institution: 東北大学

1996 - 1996

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実験圃場で、葉の寿命の大変短い(数カ月)一年生草本シロザと、寿命の長い(数年)シラカシを生育させ、光条件を変えることにより、様々な窒素含量の葉を得て、光合成特性を調べた。同じ窒素含量で比較すると、シロザの方が2倍以上飽和光合成速度が高かった。これは、1)葉内細胞間隙CO2濃度、2) RuBPCase量、3) RuBPCaseあたりの光合成速度がいずれもシラカシで低いことに起因した。葉の炭素安定同位体比を測定することにより、3)のRuBPCaseあたりの光合成速度が低い理由が、細胞間隙から葉緑体までのCO2核酸が低いためであることが示唆された。千葉県東大千葉演習林内でアカガシ、スダジイ、ヤブツバキ、シキミ、サカキ、イズセンリョウ、シロダモ、ヤブニッケイの葉の寿命の追跡を行い、さらに光合成を現地で測定した。常緑樹はとくに弱光条件で展葉頻度が低く、正確な葉の寿命を測定するためにはより長期の調査の継続が必要なことが明らかになった。芽鱗痕の計測によりおおざっぱな寿命を推定し、比較した結果、光合成の窒素利用効率は葉の寿命と負の相関があることが明らかとなった。
Analysis of canopy structure of multi-species plant communities

HIROSE Tadaki, HIKOSAKA Kohki

Offer Organization: Japan Society for the Promotion of Science

System: Grants-in-Aid for Scientific Research

Category: Grant-in-Aid for General Scientific Research (B)

Institution: TOHOKU UNIVERSITY

1994 - 1995

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A plant communty consists of a range of species different in plant height. Tall dominant species occupying upper layrs in the canopy receive a large fraction of photon flux density, while small subordinate species occupying lower layrs receive small fractions of available photons. Tall species, however, invest relatively more biomass to supporting tissues to position their leaves high in the canopy. Thus photon absorption per unit aboveground biomass is similar between tall dominant and small subordinate species. Through the two-year study, we found : (1) In the Miscanthus sinensis stand at Kawatabi, photon absorption per unit aboveground biomass of subordinate species such as Lysimachia japonica was high early in the growing season, while that of dominant Miscanthus sinensis was high late in the growing season. This enables subordinate species to coexist with dominant Miscanthus sinensis. (2) Mixed stands of rice (C3) and millet (C4) were established in a greenhouse and competition between these species was analyzed. Although millet germinating later than rice, its growth rate was larger than rice plants. Rice reduced the growth of millet by 5%, while millet reduced the growth rate of rice up to 30%. (3) We developed a model to estimate photosynthesis of individuals in a dense stand and analyzed factors involved in the development of size hierarchy. Tall dominant plants had larger photon absorption per unit aboveground biomass and larger photosynthetic rates per unit absorbed photon flux density than suppressed plants, intensiflying the size hierarchy of the stand. (4) A model was made to analyze the effect on photosynthetic capacity of different nitrogen partitioning among photosynthetic proteins. The optimal partitioning, depending on light conditions, lead to up to 20% increase in photosynthetic efficiency. (5) We compared protein partitioning between sun (Chenopodium album) and shade (Alocasia macrorrhiza) plants. Both species had protein partitioning close to the theoretical optimum.

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進路講演会

2012/05/25 -

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仙台第三高等学校進路講演会で講演
出前授業

2005/04 -

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出前授業

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将来の地球環境において最適な光合成・物質生産システムを持った強化植物の創出

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大気中の二酸化炭素濃度の増加や温暖化など、地球環境は急速かつ大きく変化しています。本研究は、将来の地球環境において最適な光合成・物質生産システムを持つ植物の創出を目的とします。野生植物の持つ環境適応能力を利用するアプローチと、誘発突然変異体を高効率でスクリーニングするアプローチにより、将来の地球環境での生産向上に関連する遺伝子を探索します。さらに、遺伝子組換えの手法に頼らず、自然変異・突然変異の掛け合わせから高効率系統の選抜を行う手法を開発・確立します。