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Regulations of symbiont turnover and phagosomal micro-environments reflecting the stability of coral-algal symbiosis

Research Project

Project/Area Number 17K15163
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Evolutionary biology
Research InstitutionTohoku University

Principal Investigator

Maruyama Shinichiro  東北大学, 生命科学研究科, 助教 (50712296)

Research Collaborator Kawata Masakado  
Ishii Yuu  
Miyazawa Makoto  
Project Period (FY) 2017-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2018: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2017: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords共生 / 細胞 / 刺胞動物 / 褐虫藻 / 細胞内共生 / 進化 / サンゴ共生系 / 食胞 / 環境応答 / オルガネラ起源 / サンゴ共生生態系
Outline of Final Research Achievements

Symbiodiniaceae algae are known as coral symbionts and play crucial roles in the coral-algal symbiosis to sustain the primary production in oligotrophic tropical and subtropical oceans. However, cellular mechanisms relevant to the establishment of the symbiosis remain to be clarified. In this study, via integrating live imaging and cell fractionation methods, foundational techniques and tools to investigate the dynamics of symbiont cells and plastic particles ingested by host cnidarian animals were developed. The results suggested that ingestion activity of the host endodermis played a key role in maintaining the stable symbiosis with symbiotic algae.

Academic Significance and Societal Importance of the Research Achievements

近年、「サンゴの白化」と呼ばれるような、褐虫藻と刺胞動物との共生が崩壊する現象が大きな環境問題となっているが、この細胞内共生を支える細胞レベルでの仕組みはよく分かっていなかった。本研究で開発された技術を用いることにより、安定な共生の維持に関わる細胞機能を詳細に解析することができるようになった。これを用いることで、マイクロプラスチックなどの海洋汚染微粒子が生物に与える影響などを解析する実験系への発展などが期待される。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (6 results)

All 2019 2018

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (5 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Journal Article] Green fluorescence from cnidarian hosts attracts symbiotic algae2019

    • Author(s)
      Yusuke Aihara, Shinichiro Maruyama, Andrew H. Baird, Akira Iguchi, Shunichi Takahashi, Jun Minagawa
    • Journal Title

      Proceedings of the National Academy of Sciences of the United State of America

      Volume: 116 Issue: 6 Pages: 2118-2123

    • DOI

      10.1073/pnas.1812257116

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 現在進行形の共生現象から葉緑体の起源を考える2019

    • Author(s)
      丸山 真一朗
    • Organizer
      植物オルガネラワークショップ
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Evolution of exonic nucleotide variation at the exon-intron boundary in coral symbiotic dinoflagellates2018

    • Author(s)
      Shinichiro Maruyama, Yuu Ishii, Takashi Makino, Masakado Kawata
    • Organizer
      XXII Meeting of the International Society of Evolutionary Protistology
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Evolution of exon-intron boundary recognition in coral symbiotic algae2018

    • Author(s)
      Shinichiro Maruyama, Yuu Ishii, Konomi Fujimura-Kamada, Natsumaro Kutsuna, Shunichi Takahashi, Takashi Makino, Jun Minagawa, Masakado Kawata
    • Organizer
      The Society for Molecular Biology and Evolution (SMBE) 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] サンゴ共生藻と刺胞動物のモデル系を用いた温暖化時代の共生生物学2018

    • Author(s)
      丸山 真一朗
    • Organizer
      Biothermology Workshop 2018
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 刺胞動物と褐虫藻との細胞内共生における共生関係の流動性の評価2018

    • Author(s)
      宮澤真琴, 石井悠, 服田昌之, 高橋俊一, 丸山真一朗, 河田雅圭
    • Organizer
      第65回日本生態学会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2020-03-30  

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