Details of the Researcher

PHOTO

Atsuko Tanaka
Section
Graduate School of Agricultural Science
Job title
Associate Professor
Degree

Research History 7

  • 2025/10 - Present
    Tohoku University　Graduate School of Agricultural Science

  • 2024/02 - 2025/09
    University of the Ryukyus　Faculty of Science Department of Chemistry, Biology and Marine Sciences　Associate Professor

  • 2016/10 - 2024/01
    University of the Ryukyus　Faculty of Science Department of Chemistry, Biology and Marine Sciences　Assistant Professor

  • 2013/06/15 - 2016/09/30
    Hokkaido University

  • 2010/06 - 2013/06
    CNRS　Postdoctoral researcher

  • 2010/06 - 2013/06
    lnstitut de Biologie, Ecole Normale Supérieure　Postdoctoral researcher

  • 2008/04 - 2010/05
    Kwansei Gakuin University　Education assistant

Show all Show first 5

Professional Memberships 3

  • 日本植物形態学会

  • 日本植物学会

  • 日本藻類学会

Research Areas 1

  • Life sciences / Morphology, anatomy /

Papers 37

  1. Influence of Light Quality on the Initial Development in Edible Brown Alga Cladosiphon okamuranus

    Yoichi Sato, Eri Inomata, Hikari Nagoe, Yuuichiro Numata, Atsuko Tanaka

    PLANTS-BASEL　15　(6)　2026/03/13

    DOI： 10.3390/plants15060895 　

    ISSN： 2223-7747

  2. Butterfly pupal wing tissue with an eyespot organizer

    Joji M. Otaki, Atsuko Tanaka, Euichi Hirose

    CELLS & DEVELOPMENT　184　2025/12

    DOI： 10.1016/j.cdev.2024.203992 　

    ISSN： 2667-2901

  3. A Bradyrhizobium isolate from a marine diatom induces nitrogen-fixing nodules in a terrestrial legume

    Udita Chandola, Eric Manirakiza, Margaux Maillard, Louis Josselin Lavier Aydat, Alicia Camuel, Camille Trottier, Atsuko Tanaka, Timothee Chaumier, Eric Giraud, Leila Tirichine

    NATURE MICROBIOLOGY　10　(10)　2025/09/05

    DOI： 10.1038/s41564-025-02105-5 　

    ISSN： 2058-5276

  4. When and where should aquaculture nets be deployed in a nursery site to maximize Cladosiphon okamuranus growth?

    Hikari Nagoe, Gregory N. Nishihara, Yuichiro Numata, Kandai Tozaki, Kaoru Maeganeku, Atsuko Tanaka, Yoichi Sato

    PHYCOLOGICAL RESEARCH　73　(4)　301-311　2025/09/01

    DOI： 10.1111/pre.70011 　

    ISSN： 1322-0829

    eISSN： 1440-1835

  5. Carbon and nitrogen contents depends on macroalgal species, their tissue section, and development stage

    Yoichi Sato, Daisuke Saito, Eri Inomata, Atsuko Tanaka, Gregory N. Nishihara

    PHYCOLOGICAL RESEARCH　74　(2)　175-187　2025/07/21

    DOI： 10.1111/pre.70007 　

    ISSN： 1322-0829

    eISSN： 1440-1835

  6. Non-cyanobacterial diazotrophs support the survival of marine microalgae in nitrogen-depleted environment

    Udita Chandola, Marinna Gaudin, Camille Trottier, Louis-Josselin Lavier-Aydat, Eric Manirakiza, Samuel Menicot, Erik Jorg Fischer, Isabelle Louvet, Thomas Lacour, Timothee Chaumier, Atsuko Tanaka, Georg Pohnert, Samuel Chaffron, Leila Tirichine

    GENOME BIOLOGY　26　(1)　2025/05/28

    DOI： 10.1186/s13059-025-03597-4 　

    ISSN： 1474-760X

  7. Comprehensive protocol for preparing diatom cell samples and associated bacterial consortia for scanning electron microscopy

    Margaux Maillard, Nicolas Stephant, Atsuko Tanaka, Leila Tirichine

    STAR PROTOCOLS　5　(4)　2024/12/20

    DOI： 10.1016/j.xpro.2024.103380 　

    ISSN： 2666-1667

  8. Diatom pyrenoids are encased in a protein shell that enables efficient CO2 fixation Peer-reviewed

    Ginga Shimakawa, Manon Demulder, Serena Flori, Akihiro Kawamoto, Yoshinori Tsuji, Hermanus Nawaly, Atsuko Tanaka, Rei Tohda, Tadayoshi Ota, Hiroaki Matsui, Natsumi Morishima, Ryosuke Okubo, Wojciech Wietrzynski, Lorenz Lamm, Ricardo D. Righetto, Clarisse Uwizeye, Benoit Gallet, Pierre-Henri Jouneau, Christoph Gerle, Genji Kurisu, Giovanni Finazzi, Benjamin D. Engel, Yusuke Matsuda

    Cell　187　(21)　5919-+　2024/10

    DOI： 10.1016/j.cell.2024.09.013 　

    ISSN： 0092-8674

    eISSN： 1097-4172

  9. Temperature influences on dimorphism of microthallus in a brown alga <i>Cladosiphon okamuranus</i>

    Atsuko Tanaka, Honoka Takara, Seidai Kamata, Yoichi Sato, Ran Ueshiro

    CYTOLOGIA　89　(2)　89-96　2024/06/25

    DOI： 10.1508/cytologia.89.89 　

    ISSN： 0011-4545

    eISSN： 1348-7019

  10. Phenylboronic Acid-Functionalized Micelles Dual-Targeting Boronic Acid Transporter and Polysaccharides for siRNA Delivery into Brown Algae

    Naoto Yoshinaga, Takaaki Miyamoto, Mami Goto, Atsuko Tanaka, Keiji Numata

    JACS AU　4　(4)　1385-1395　2024/03/22

    DOI： 10.1021/jacsau.3c00767 　

    eISSN： 2691-3704

  11. Vegetation variety affected by local environments in a coral reef lagoon

    Kandai Tozaki, Gregory N. Nishihara, Azusa Kawate, Teruko Konishi, Yoichi Sato, Michihiro Ito, Hiroyuki Fujimura, Atsuko Tanaka

    Phycological Research　72　(2)　112-122　2024/01/09

    DOI： 10.1111/pre.12540 　

    ISSN： 1322-0829

    eISSN： 1440-1835

  12. The Cell Wall Characterization of Brown Alga Cladosiphon okamuranus during Growth Peer-reviewed

    Yuka Miwa, Mahanama Geegana, Gamage Awanthi, Kouichi Soga, Atsuko Tanaka, Michihiro Ito, Yuichiro Numata, Yoichi Sato, Teruko Konishi

    Plants　12　(3274)　2023/09

    DOI： 10.3390/plants12183274 　

    ISSN： 2223-7747

  13. Characterization of cell wall polysaccharide from <scp>Cladosiphon okamuranus</scp> cultivated in different locations

    Mahanama Geegana Gamage Awanthi, Natsuki Nakasone, Hirosuke Oku, Kanefumi Kitahara, Michihiro Ito, Atsuko Tanaka, Yoichi Sato, Yuichiro Numata, Teruko Konishi

    Phycological Research　72　(1)　3-11　2023/08/24

    DOI： 10.1111/pre.12531 　

    ISSN： 1322-0829

    eISSN： 1440-1835

  14. Localization and characterization θ carbonic anhydrases in Thalassiosira pseudonana Peer-reviewed

    Hermanus Nawaly, Atsuko Tanaka, Yui Toyoshima, Yoshinori Tsuji, Yusuke Matsuda

    Photosynthesis Research　156　(2)　217-229　2023/03/02

    DOI： 10.1007/s11120-023-01007-z 　

    ISSN： 0166-8595

    eISSN： 1573-5079

  15. Pleiotropic Functions of Nitric Oxide Produced by Ascorbate for the Prevention and Mitigation of COVID-19: A Revaluation of Pauling’s Vitamin C Therapy Peer-reviewed

    Hideo Yamasaki, Hideyuki Imai, Atsuko Tanaka, Joji M. Otaki

    Microorganisms　11　(2)　397-397　2023/02/03

    DOI： 10.3390/microorganisms11020397 　

    eISSN： 2076-2607

  16. Fractionation and characterization of cell wall polysaccharides from the brown alga Cladosiphon okamuranus Peer-reviewed

    Mahanama Geegana Gamage Awanthi, Manatsu Umosa, Yoshiaki Yuguchi, Hirosuke Oku, Kanefumi Kitahara, Michihiro Ito, Atsuko Tanaka, Teruko Konishi

    Carbohydrate Research　523　108722-108722　2023/01

    DOI： 10.1016/j.carres.2022.108722 　

    ISSN： 0008-6215

    eISSN： 1873-426X

  17. Nutrient uptake characteristics of Cladosiphon okamuranus (Phaeophyceae) from the Ryukyu Islands of Japan Peer-reviewed

    Yoichi Sato, Eri Inomata, Hikari Nagoe, Michihiro Ito, Teruko Konishi, Hiroyuki Fujimura, Atsuko Tanaka, Gregory N. Nishihara

    Journal of Applied Phycology　35　(1)　265-275　2022/11/30

    DOI： 10.1007/s10811-022-02881-1 　

    ISSN： 0921-8971

    eISSN： 1573-5176

  18. Variability in the Net Ecosystem Productivity (NEP) of Seaweed Farms Peer-reviewed

    Yoichi Sato, Gregory N. Nishihara, Atsuko Tanaka, Dominic F, C. Belleza, Azusa Kawate, Yukio Inoue, Kenjiro Hinode, Yuhei Matsuda, Shinichiro Tanimae, Kandai Tozaki, Ryuta Terada, Hikaru Endo

    Frontiers in Marine Science　9　2022/05

    Publisher: Frontiers Media SA

    DOI： 10.3389/fmars.2022.861932 　

    eISSN： 2296-7745

    More details Close

    The important role of vegetated ecosystems in the sequestration of carbon has gained strong interest across a wide variety of disciplines. With evidence growing of the potential for macroalgae ecosystems to capture carbon, there is burgeoning interest in applying newfound knowledge of carbon capture rates to better understand the potential for carbon sequestration. Seaweed farms are expected to play a significant role in carbon capture; advocates for the expansion of seaweed farms are increasing in many countries. In general, seaweed farms are expected to be highly productive, although whether they are autotrophic or heterotrophic ecosystems and hence potential exporters of carbon, is under debate. Therefore, we present our investigation of three seaweed farms, two in northern Japan and one in southern Japan. We examine the frequency of autotrophic days and compare potential rates of carbon capture of the seaweed farms with two natural macroalgae ecosystems and one degraded site. We estimated potential carbon capture rates by calculating the net ecosystem productivity from continuous recordings of dissolved oxygen concentrations under natural environmental conditions. The net ecosystem production rates for the natural ecosystems in Arikawa Bay and Omura Bay were equivalent to 0.043 and 0.054 [g C m-2 d-1] m-1, respectively. Whereas, for the degraded ecosystem in Tainoura Bay, it was -0.01 [g C m-2 d-1] m-1. We reveal that the Undaria pinnatifida farm in Matsushima Bay experience autotrophy more often than natural ecosystems, although for seaweed farms producing U. pinnatifida in Hirota Bay and Cladospihon okamuranus at Bise Point, autotrophy was less frequently observed. Nevertheless, up to 14.1 g C m-2 (0.110 g C m-2 d-1) was captured by the production of U. pinnatifida and 3.6 g C m-2 (0.034 g C m-2 d-1) was captured by C. okamuranus, and the total yield of carbon captured during 2021 production season for these farms was 43,385 kg C.

  19. Final yield of the brown alga Cladosiphon okamuranus ( Chordariaceae, Phaeophyceae ) may depend on nursery quality

    Yoichi Sato, Hikari Nagoe, Michihiro Ito, Teruko Konishi, Hiroyuki Fujimura, Gregory N. Nishihara, Atsuko Tanaka

    Phycological Research　69　(3)　159-165　2021/01/06

    DOI： 10.1111/pre.12453 　

    ISSN： 1322-0829

    eISSN： 1440-1835

  20. Systematics, distribution, and sexual compatibility of six Scytosiphon species (Scytosiphonaceae, Phaeophyceae) from Japan and the description of four new species Peer-reviewed

    Masakazu Hoshino, Atsuko Tanaka, Mitsunobu Kamiya, Shinya Uwai, Masanori Hiraoka, Kazuhiro Kogame

    Journal of Phycology　57　(2)　416-434　2020/10/24

    DOI： 10.1111/jpy.13089 　

    ISSN： 0022-3646

    eISSN： 1529-8817

  21. Community-Level Responses to Iron Availability in Open Ocean Plankton Ecosystems Peer-reviewed

    Luigi Caputi, Quentin Carradec, Damien Eveillard, Amos Kirilovsky, Eric Pelletier, Juan J. Pierella Karlusich, Fabio Rocha Jimenez Vieira, Emilie Villar, Samuel Chaffron, Shruti Malviya, Eleonora Scalco, Silvia G. Acinas, Adriana Alberti, Jean-Marc Aury, Anne-Sophie Benoiston, Alexis Bertrand, Tristan Biard, Lucie Bittner, Martine Boccara, Jennifer R. Brum, Christophe Brunet, Greta Busseni, Anna Carratala, Herve Claustre, Luis Pedro Coelho, Sbastien Colin, Salvatore D'Aniello, Corinne Da Silva, Marianna Del Core, Hugo Dore, Stephane Gasparini, Florian Kokoszka, Jean-Louis Jamet, Christophe Lejeusne, Cyrille Lepoivre, Magali Lescot, Gipsi Lima-Mendez, Fabien Lombard, Julius Lukes, Nicolas Maillet, Mohammed-Amin Madoui, Elodie Martinez, Maria Grazia Mazzocchi, Mario B. Neou, Javier Paz-Yepes, Julie Poulain, Simon Ramondenc, Jean-Baptiste Romagnan, Simon Roux, Daniela Salvagio Manta, Remo Sanges, Sabrina Speich, Mario Sprovieri, Shinichi Sunagawa, Vincent Taillandier, Atsuko Tanaka, Leila Tirichine, Camille Trottier, Julia Uitz, Alaguraj Veluchamy, Jana Vesela, Flora Vincent, Sheree Yau, Stefanie Kandels-Lewis, Sarah Searson, Cline Dimier, Marc Picheral, Peer Bork, Emmanuel Boss, Colomban De Vargas, Michael J. Follows, Nigel Grimsley, Lionel Guidi, Pascal Hingamp, Eric Karsenti, Paolo Sordino, Lars Stemmann, Matthew B. Sullivan, Alessandro Tagliabue, Adriana Zingone, Laurence Garczarek, Fabrizio d'Ortenzio, Pierre Testor, Fabrice Not, Maurizio Ribera d'Alcala, Patrick Wincker, Chris Bowler, Daniele Iudicone, Gabriel Gorsky, Olivier Jaillon, Lee Karp-Boss, Uros Krzic, Hiroyuki Ogata, Stephane Pesant, Jeroen Raes, Emmanuel G. Reynaud, Christian Sardet, Mike Sieracki, Didier Velayoudon, Jean Weissenbach

    GLOBAL BIOGEOCHEMICAL CYCLES　33　(3)　391-419　2019/03

    DOI： 10.1029/2018GB006022 　

    ISSN： 0886-6236

    eISSN： 1944-9224

  22. Asexual reproduction of the marine green alga Struvea okamurae

    Yusuke Horinouchi, Akihiro Dozono, Atsuko Tanaka, Tatsuya Togashi

    Marine Biosystems Research　33　2-7　2019

  23. Theme session “Marine science researches of Okinawa Research Core for Highly Innovative Discipline Science (ORCHIDS) project” Peer-reviewed

    Takashi NAKAMURA, James Davis REIMER, Ryuichi SHINJO, Mamoru NAKAMURA, Atsuko TANAKA, Hin Boo WEE

    Journal of the Japanese Coral Reef Society　21　(1)　1-12　2019

    Publisher: Japanese Coral Reef Society

    DOI： 10.3755/jcrs.21.1 　

    ISSN： 1345-1421

    eISSN： 1882-5710

  24. Branch regeneration induced by sever damage in the brown alga Dictyota dichotoma (dictyotales, phaeophyceae) Peer-reviewed

    Atsuko Tanaka, Yoichiro Hoshino, Chikako Nagasato, Taizo Motomura

    PROTOPLASMA　254　(3)　1341-1351　2017/05

    DOI： 10.1007/s00709-016-1025-4 　

    ISSN： 0033-183X

    eISSN： 1615-6102

  25. INTERCELLULAR TRANSLOCATION OF MOLECULES VIA PLASMODESMATA IN THE MULTISERIATE FILAMENTOUS BROWN ALGA, HALOPTERIS CONGESTA (SPHACELARIALES, PHAEOPHYCEAE) Peer-reviewed

    Chikako Nagasato, Atsuko Tanaka, Toshiaki Ito, Christos Katsaros, Taizo Motomura

    JOURNAL OF PHYCOLOGY　53　(2)　333-341　2017/04

    DOI： 10.1111/jpy.12498 　

    ISSN： 0022-3646

    eISSN： 1529-8817

  26. Chemotaxis in the anisogamous brown alga Mutimo cylindricus (Cutleriaceae, Tilopteridales) Peer-reviewed

    Nana Kinoshita, Chikako Nagasato, Atsuko Tanaka, Taizo Motomura

    PHYCOLOGIA　55　(4)　359-364　2016

    DOI： 10.2216/15-150.1 　

    ISSN： 0031-8884

  27. Ultrastructure and Membrane Traffic During Cell Division in the Marine Pennate Diatom Phaeodactylum tricornutum Peer-reviewed

    Atsuko Tanaka, Alessandra De Martino, Alberto Amato, Anton Montsant, Benjamin Mathieu, Philippe Rostaing, Leila Tirichine, Chris Bowler

    PROTIST　166　(5)　506-521　2015/11

    DOI： 10.1016/j.protis.2015.07.005 　

    ISSN： 1434-4610

  28. Energetic coupling between plastids and mitochondria drives CO2 assimilation in diatoms Peer-reviewed

    Benjamin Bailleul, Nicolas Berne, Omer Murik, Dimitris Petroutsos, Judit Prihoda, Atsuko Tanaka, Valeria Villanova, Richard Bligny, Serena Flori, Denis Falconet, Anja Krieger-Liszkay, Stefano Santabarbara, Fabrice Rappaport, Pierre Joliot, Leila Tirichine, Paul G. Falkowski, Pierre Cardol, Chris Bowler, Giovanni Finazzi

    NATURE　524　(7565)　366-U267　2015/08

    DOI： 10.1038/nature14599 　

    ISSN： 0028-0836

    eISSN： 1476-4687

  29. Development and function of plasmodesmata in zygotes of Fucus distichus Peer-reviewed

    Chikako Nagasato, Makoto Terauchi, Atsuko Tanaka, Taizo Motomura

    BOTANICA MARINA　58　(3)　229-238　2015/06

    DOI： 10.1515/bot-2014-0082 　

    ISSN： 0006-8055

    eISSN： 1437-4323

  30. Environmental characteristics of Agulhas rings affect interocean plankton transport Peer-reviewed

    Emilie Villar, Gregory K. Farrant, Michael Follows, Laurence Garczarek, Sabrina Speich, Stephane Audic, Lucie Bittner, Bruno Blanke, Jennifer R. Brum, Christophe Brunet, Raffaella Casotti, Alison Chase, John R. Dolan, Fabrizio d'Ortenzio, Jean-Pierre Gattuso, Nicolas Grima, Lionel Guidi, Christopher N. Hill, Oliver Jahn, Jean-Louis Jamet, Herve Le Goff, Cyrille Lepoivre, Shruti Malviya, Eric Pelletier, Jean-Baptiste Romagnan, Simon Roux, Sebastien Santini, Eleonora Scalco, Sarah M. Schwenck, Atsuko Tanaka, Pierre Testor, Thomas Vannier, Flora Vincent, Adriana Zingone, Celine Dimier, Marc Picheral, Sarah Searson, Stefanie Kandels-Lewis, Silvia G. Acinas, Peer Bork, Emmanuel Boss, Colomban de Vargas, Gabriel Gorsky, Hiroyuki Ogata, Stephane Pesant, Matthew B. Sullivan, Shinichi Sunagawa, Patrick Wincker, Eric Karsenti, Chris Bowler, Fabrice Not, Pascal Hingamp, Daniele Iudicone

    SCIENCE　348　(6237)　1261447　2015/05

    DOI： 10.1126/science.1261447 　

    ISSN： 0036-8075

    eISSN： 1095-9203

  31. Functional characterization of the diatom cyclin-dependent kinase A2 as a mitotic regulator reveals plant-like properties in a non-green lineage Peer-reviewed

    Marie J. J. Huysman, Atsuko Tanaka, Chris Bowler, Wim Vyverman, Lieven De Veylder

    BMC PLANT BIOLOGY　15　86　2015/03

    DOI： 10.1186/s12870-015-0469-6 　

    ISSN： 1471-2229

  32. A Novel Protein, Ubiquitous in Marine Phytoplankton, Concentrates Iron at the Cell Surface and Facilitates Uptake Peer-reviewed

    Joe Morrissey, Robert Sutak, Javier Paz-Yepes, Atsuko Tanaka, Ahmed Moustafa, Alaguraj Veluchamy, Yann Thomas, Hugo Botebol, Francois-Yves Bouget, Jeffrey B. McQuaid, Leila Tirichine, Andrew E. Allen, Emmanuel Lesuisse, Chris Bowler

    CURRENT BIOLOGY　25　(3)　364-371　2015/02

    DOI： 10.1016/j.cub.2014.12.004 　

    ISSN： 0960-9822

    eISSN： 1879-0445

  33. SLC4 family transporters in a marine diatom directly pump bicarbonate from seawater Peer-reviewed

    Kensuke Nakajima, Atsuko Tanaka, Yusuke Matsuda

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA　110　(5)　1767-1772　2013/01

    DOI： 10.1073/pnas.1216234110 　

    ISSN： 0027-8424

  34. Chloroplast-mitochondria cross-talk in diatoms Peer-reviewed

    Judit Prihoda, Atsuko Tanaka, Wilson B. M. de Paula, John F. Allen, Leila Tirichine, Chris Bowler

    JOURNAL OF EXPERIMENTAL BOTANY　63　(4)　1543-1557　2012/02

    DOI： 10.1093/jxb/err441 　

    ISSN： 0022-0957

    eISSN： 1460-2431

  35. A Holistic Approach to Marine Eco-Systems Biology Peer-reviewed

    Eric Karsenti, Silvia G. Acinas, Peer Bork, Chris Bowler, Colomban De Vargas, Jeroen Raes, Matthew Sullivan, Detlev Arendt, Francesca Benzoni, Jean-Michel Claverie, Mick Follows, Gaby Gorsky, Pascal Hingamp, Daniele Iudicone, Olivier Jaillon, Stefanie Kandels-Lewis, Uros Krzic, Fabrice Not, Hiroyuki Ogata, Stéphane Pesant, Emmanuel Georges Reynaud, Christian Sardet, Michael E. Sieracki, Sabrina Speich, Didier Velayoudon, Jean Weissenbach, Patrick Wincker

    PLoS Biology　9　(10)　e1001177-e1001177　2011/10/18

    Publisher: Public Library of Science (PLoS)

    DOI： 10.1371/journal.pbio.1001177 　

    eISSN： 1545-7885

  36. Phaeophysemagen. nov. andVimineoleathesiagen. nov., new brown algal genera for the minute Japanese members of the genusLeathesia Peer-reviewed

    Atsuko Tanaka, Shinya Uwai, Wendy Nelson, Hiroshi Kawai

    European Journal of Phycology　45　(1)　107-115　2010/02

    DOI： 10.1080/09670260903383271 　

    ISSN： 0967-0262

    eISSN： 1469-4433

  37. Re-examination of ultrastructures of the stellate chloroplast organization in brown algae: Structure and development of pyrenoids Peer-reviewed

    Atsuko Tanaka, Chikako Nagasato, Shinya Uwai, Taizo Motomura, Hiroshi Kawai

    PHYCOLOGICAL RESEARCH　55　(3)　203-213　2007/09

    DOI： 10.1111/j.1440-1835.2007.00463.x 　

    ISSN： 1322-0829

    eISSN： 1440-1835

Show all ︎Show first 5

Misc. 2

  1. 藻類学最前線 水圏の光合成を支える動的で柔らかいピレノイド

    田中 厚子

    藻類 = The Japanese journal of phycology　67　(1)　5-9　2019/03/10

    Publisher: 日本藻類学会

    ISSN： 0038-1578

  2. バイオ系のキャリアデザイン たゆたえど沈まず

    田中 厚子

    生物工学会誌　93　(4)　225-227　2015

    Publisher: 日本生物工学会

    ISSN： 0919-3758

Research Projects 6

  1. 珪藻葉緑体の高温ストレス応答とセレン誘導性高温耐性機構の解明

    田中 厚子

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 琉球大学

    2023/04/01 - 2026/03/31

    More details Close

    1年目に行う予定であったFIB-SEMを用いた葉緑体の3次元構造観察は定常状態野生株でのデータ解析を継続しておこなっている。高温ストレスによってダメージを受けた野生株の解析まで行う予定であったが，利用している他機関の高圧凍結装置の故障によって頓挫している。そのため，リファレンスとしての定常状態の野生株データの解析を進めつつ，葉緑体オートファジーを連続的に観察する手法の確立を行なった。その結果，これまで集団として認識していた葉緑体の矮小化が同一細胞の経時観察でも同様に確認されたため，葉緑体の矮小化が細胞分裂を経て生じる（つまり二分裂後に肥大化しない）訳ではなく，元の葉緑体サイズが直接縮小して矮小化するという確信を得ることができた。この結果は葉緑体が部分的に消化されている可能性を強く示唆しており，より詳細な葉緑体の部分消化の検出に向けて，複数の電子顕微鏡を駆使した観察を開始している。 さらに2年目に行う予定であったセレン誘導性高温耐性への光の影響の予備実験も開始しており，光と高温の混合ストレス下でのセレンの高温耐性誘導性についての予備データを得ている。現時点では，光強度によって高温ストレス応答が異なるため，セレン誘導性高温耐性の効果にも違いがあることが分かってきた。今後はこれらの予備データを参考にしながら，高温ストレス条件下における光の影響についても検証を進め，自然環境下で生じ得る現象についての理解を目指す。

  2. 珪藻ピレノイドの機能から読み解く，海洋二次葉緑体のグローバルインパクト Competitive

    松田 祐介

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    2019/04 - 2024/03

  3. 海藻の生育を支える海藻-微生物相互作用の全体像の解明

    伊藤 通浩, 小西 照子, 田中 厚子, 岩崎 公典

    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: 琉球大学

    2020/04 - 2023/03

    More details Close

    オキナワモズク微生物叢の網羅的解析法の構築を試みた。16S rRNA遺伝子のアンプリコンシーケンシングによる微生物叢解析法をオキナワモズクに適用するにあたり、実際の微生物叢に近いと考えられるショットガンシーケンシングによるオキナワモズク微生物叢データと、高い相関を示すデータを得られるPCR条件を72通りの組み合わせから選抜した。次に、本研究で選抜したPCR条件を用いて、沖縄県内8地点から採取したオキナワモズクとオキナワモズク漁場の微生物叢を解析した。結果として、オキナワモズクとその周辺海水の微生物叢は明確に異なっており、オキナワモズクにはオキナワモズクの微生物叢が形成されていること、および、オキナワモズク微生物叢は産地ごとの特徴があることが判明した。また、沖縄県本部町備瀬の地先のオキナワモズク漁場にモズク微生物叢を時系列で追跡する野外実験を行い、モズクの採取時期によりオキナワモズク微生物叢に大きな差異が見出された。以上のオキナワモズク微生物叢データより、オキナワモズクの全サンプルに見出される１菌種を見出すことができた。 オキナワモズクのトランスクリプトーム解析を行う目的で市販の植物用キットを用いてRNA抽出を行ったところ、収量がきわめて低く、市販キットの標準プロトコルはオキナワモズクに適用できないことが判明した。そこで、独自のステップを追加するなど当該プロトコルを修正し、遺伝子発現解析に適用可能なオキナワモズクからのRNA抽出法を確立した。 オキナワモズクの藻体成分の解析の結果、オキナワモズク細胞壁多糖組成に生長段階ごとの差異が見出された。水溶成分を標的としたメタボローム解析では、脂肪酸が多く検出された一方、有機酸やビタミン類の検出には解析法の修正が必要であることが明らかとなった。

  4. Mitigating climate change through seaweed aquaculture

    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: Nagasaki University

    2020/04 - 2023/03

  5. 褐藻切断組織の組織癒合過程におけるオーキシン調節作用の解明 Competitive

    田中 厚子, 松浦 英幸, 農学研究院

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    2017/04 - 2020/03

  6. Regulation of plasmodesmata in brown algae

    NAGASATO Chikako, FUJITA Tomomichi

    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: Hokkaido University

    2014/04/01 - 2017/03/31

    More details Close

    Brown algae show multicellularity and possess cellular connections called plasmodesmata which enable exchange of molecules between the neighboring cells. Plasmadesmata take tubular structure with 10 - 20 nm in diameter, and vary appearance and distribution with the developmental stages. Some new findings concerning brown algal plasmodesmata were given in this study as follows; 1) plasmodesmata are divided into primary and secondary plasmodesmata as in land plants, 2) plasmodesmatal size exclusion limit are set between 20-40 kDa in multiseriate species, and 3) pit fields in which plasmodesmata concentrate one place on the cross wall pass molecules less than 10 kDa to the next cell.

Show all Show first 5