惑星分光観測衛星プロジェクトチーム

木村 駿太

キムラ シュンタ  (Shunta Kimura)

基本情報

所属
国立研究開発法人宇宙航空研究開発機構 宇宙科学研究所 特任助教
東京大学 農学共同研究員
総合研究大学院大学 助教
学位
博士(農学)(2018年3月 筑波大学)

研究者番号
60838762
J-GLOBAL ID
202001011430020518
researchmap会員ID
R000007282

主要な受賞

 15

主要な論文

 17
  • Shunta Kimura, Shu Ishikawa, Nobuya Hayashi, Kazuhisa Fujita, Yuko Inatomi, Shino Suzuki
    Frontiers in Microbiology 14 1253436 2023年12月13日  査読有り筆頭著者責任著者
  • Kaori Tomita-Yokotani, Shunta Kimura, Midori Ong, Miku Tokita, Hiroshi Katoh, Tomoko Abe, Hirofumi Hashimoto, Kintake Sonoike, Masayuki Ohmori
    Astrobiology 21(12) 1505-1514 2021年12月  査読有り
  • Shunta Kimura, Masatoshi Nakajima, Emi Yumoto, Koji Miyamoto, Hisakazu Yamane, Midori Ong, Kaori Tomita-Yokotani, Tadao Asami
    Plant Growth Regulation 92(2) 273-282 2020年6月23日  査読有り筆頭著者
    © 2020, Springer Nature B.V. Cyanobacteria are distributed globally in the sea, fresh water, and land. Akinetes (dormant cells) of cyanobacteria are highly resistant to dry conditions, contributing to the survival of terrestrial cyanobacteria. However, the substances that regulate akinete dormancy and germination have not been elucidated. The present study investigated the effects of the phytohormone cytokinin (CK), on the germination stage of a terrestrial filamentous cyanobacterium, Nostoc sp. HK-01. In the cell suspensions of Nostoc sp. HK-01, isopentenyladenine (iP), isopentenyladenosine (iPR), cis-zeatin (cZ), cis-zeatinriboside (cZR), trans-zeatin (tZ), and a trace amount of trans-zeatinriboside (tZR) were identified, according to their retention times and multiple reaction monitoring (MRM) transitions, using high performance liquid chromatography and electrospray ionization tandem mass spectrometry (HPLC-ESI-MS/MS). Product ion scans also identified iP, iPR, cZ, and cZR. The present study established an isolation method for the dormant Nostoc akinetes, and then treated them with CKs. iP and tZ promoted the germination of akinetes, while cZ did not. S-4893, which is a CK antagonist, inhibited germination and the promotive activity of the applied iP. The results strongly suggest that cyanobacteria have a very similar perception system to plants, and that they regulate the dormancy and germination of their own cells and/or other cells via CKs. The production of CKs by several species of cyanobacteria was previously reported. However, this is the first investigation showing the role of phytohormones in the dormant cell physiology of cyanobacteria.
  • Shunta Kimura, Kaori Tomita-Yokotani, Hiroshi Katoh, Seigo Sato, Masayuki Ohmori
    Biological Sciences in Space 31 1-8 2017年  査読有り筆頭著者

主要なMISC

 14

書籍等出版物

 1

主要な講演・口頭発表等

 57

担当経験のある科目(授業)

 1
  • 2021年10月
    分子細胞生物学  (東京農業大学大学院 生命科学研究科 バイオサイエンス専攻)

主要な共同研究・競争的資金等の研究課題

 11

学術貢献活動

 1

社会貢献活動

 6

メディア報道

 7