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Study on the diversity and evolution of symbiotic protozoa which contain much number of algal cells

Research Project

Project/Area Number 16K07491
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Biodiversity/Systematics
Research InstitutionNagahama Institute of Bio-Science and Technology

Principal Investigator

Hoshina Ryo  長浜バイオ大学, バイオサイエンス学部, 助教 (40373089)

Co-Investigator(Kenkyū-buntansha) 小倉 淳  長浜バイオ大学, バイオサイエンス学部, 准教授 (60465929)
Research Collaborator KUSUOKA Yasushi  
SUZAKI Toshinobu  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords細胞内共生 / 植物化 / 藻類 / 原生動物 / 二次共生 / ゲノム進化 / 盗葉緑体 / 進化
Outline of Final Research Achievements

Protozoa with many symbiotic algae in the cell are defined as MARP. In Lake Biwa, multiple MARPs share algae of the same species. This symbiotic alga is reported to have the same sharing phenomenon in Europe and is considered to be the key to the MARP symbiotic system. We succeeded in isolation and cultivation of this symbiotic alga and described as a new genus new species.
For a natural symbiont Chlorella variabilis, it was found that the thickness and the chemical composition of the cell wall changed between symbiotic condition and free-culture. This phenomenon is considered to be related to possibility of intracellular symbiosis, and in the future, detailed comparison with non-symbiotic species becomes an issue.
We developed a method to determine meddle-sized genome with high quality and low cost. We are currently comparing the genomes of various symbiotic algae, and will help clarify the MARP symbiosis system.

Academic Significance and Societal Importance of the Research Achievements

自己の細胞内に他者を受け入れる=細胞内共生という生物間現象は、ミトコンドリアや葉緑体に見られるように、真核生物の進化においてきわめて重要な役割を果たしてきた。また、近年の藻類の研究からは、真核光合成藻類を新たに別の真核微生物が取り込んで融合(二次共生)し、これにより多様な光合成生物が続々と誕生したことがわかってきている。淡水域では自己の細胞内に多数の球状緑色藻類を共生させる様々な原生動物がいる。しかし、それら共生緑色藻の種、共生関係の安定度、地域依存性や共生による互いのメリットの有無など、その実態は不明な点が多い。今後「植物化」へと進むのかどうかを含め、細胞内共生の実態解明に挑んでいる。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (24 results)

All 2019 2018 2017 2016

All Journal Article (4 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (20 results) (of which Int'l Joint Research: 7 results,  Invited: 3 results)

  • [Journal Article] Carolibrandtia nom. nov. as a replacement name for Brandtia Hoshina (Chlorellaceae, Trebouxiophyceae)2018

    • Author(s)
      Hoshina Ryo、Nakada Takashi
    • Journal Title

      Phycological Research

      Volume: 66 Issue: 1 Pages: 82-83

    • DOI

      10.1111/pre.12208

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Endosymbiosis-related changes in ultrastructure and chemical composition of Chlorella variabilis (Archaeplastida, Chlorophyta) cell wall in Paramecium bursaria (Ciliophora, Oligohymenophorea)2018

    • Author(s)
      Rina Higuchi, Chihong Song, Ryo Hoshina and ToshinobuSuzaki
    • Journal Title

      Eur. J. Protistol.

      Volume: 66 Pages: 149-155

    • DOI

      10.1016/j.ejop.2018.09.003

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] De novo assembly of middle-sized genome using MinION and Illumina sequencers2018

    • Author(s)
      Minei Ryuhei、Hoshina Ryo、Ogura Atsushi
    • Journal Title

      BMC Genomics

      Volume: 19 Issue: 1

    • DOI

      10.1186/s12864-018-5067-1

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Brandtia ciliaticola gen. et sp. nov. (Chlorellaceae, Trebouxiophyceae) a common symbiotic green coccoid among various ciliate species2017

    • Author(s)
      Ryo Hoshina, Mayumi Kobayashi, Toshinobu Suzaki, Yasushi Kusuoka
    • Journal Title

      Phycol. Res.

      Volume: 66 Issue: 1 Pages: 76-81

    • DOI

      10.1111/pre.12194

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 共生できなくなった偏性共生クロレラChlorella variabilis変異株のオミクスアプローチによる共生メカニズム解明2019

    • Author(s)
      嶺井 隆平, 保科 亮, 藍川晋平, 洲崎 敏伸, 小倉淳
    • Organizer
      日本藻類学会第43回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ミドリゾウリムシ共生クロレラのゲノム・トランスクリプトーム解析から明らかになった大規模な遺伝子増加と共生の関連性2018

    • Author(s)
      嶺井 隆平, 保科 亮, 洲崎 敏伸, 小倉淳
    • Organizer
      日本原生生物学会第51回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 繊毛虫に共有される共生藻Carolibrandtia ciliaticolaの特性2018

    • Author(s)
      保科 亮, 柴田 あいか, 河地 正伸
    • Organizer
      日本共生生物学会第2回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ミドリゾウリムシ共生クロレラのゲノム・トランスクリプトーム解析から明らかになった細胞内二次共生初期におけるゲノムの変化2018

    • Author(s)
      嶺井 隆平, 保科 亮, 洲崎 敏伸, 小倉淳
    • Organizer
      日本共生生物学会第2回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 非共生クロレラから発見された共生クロレラ特異的巨大ウイルス全ゲノム挿入2018

    • Author(s)
      村瀬 佳乃, 嶺井 隆平, 保科 亮, 小倉 淳
    • Organizer
      日本共生生物学会第2回大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 繊毛虫ロクソデスから得られた共生藻株について2017

    • Author(s)
      保科 亮, 早川昌志, 洲崎敏伸
    • Organizer
      日本藻類学会第41回大会
    • Place of Presentation
      高知大学朝倉キャンパス(高知県高知市)
    • Year and Date
      2017-03-23
    • Related Report
      2016 Research-status Report
  • [Presentation] クロレラ:分類、生態、ゲノム、進化...2017

    • Author(s)
      保科 亮
    • Organizer
      日本藻類学会第41回大会ワークショップ
    • Place of Presentation
      高知大学朝倉キャンパス(高知県高知市)
    • Year and Date
      2017-03-23
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] De novo endosymbiotic green algae genome assembly Nanopore MinION2017

    • Author(s)
      Ryuhei Minei, Ryo Hoshina, Atsushi Ogura
    • Organizer
      The International Conference on Genome Science: from Basic Research to Applications, HanoiThe International Conference on Genome Science: from Basic Research to Applications, Hanoi
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Evolutionary genomics change of symbiont in relation to giant virus2017

    • Author(s)
      Ryo Hoshina, Ryuhei Minei, Atsushi Ogura
    • Organizer
      The International Conference on Genome Science: from Basic Research to Applications, Hanoi
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Genomic changes of symbiont for the multi-algae retaining protists2017

    • Author(s)
      Atsushi Ogura, Yuki Akizuki, Ryuhei Minei, Ryo Hoshina
    • Organizer
      VI Euro Evo Devo, Uppsala, Sweden
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Study on Pelagovasicola-like ciliate with sequestered diatom chloroplasts2017

    • Author(s)
      Ryo Hoshina, Mayumi Kobayashi, Toshinabu Suzaki, Yasushi Kusuoka
    • Organizer
      XV International Congress of Protistology, Prague
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Chlorb’ (Chlorellaceae, Trebouxiophyceae) a common symbiotic green coccoid of various ciliate species2017

    • Author(s)
      Ryo Hoshina, Mayumi Kobayashi, Toshinabu Suzaki, Yasushi Kusuoka
    • Organizer
      VIII Asian Pacific Phycological Forum, Kuala Lumpur
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] クロレラ共生種・自由生活種、そして巨大ウイルスウイルスのゲノム比較から迫るゲノム共進化とウイルス抵抗性2017

    • Author(s)
      嶺井 隆平, 秋月 祐輝, 植田 侑希, 保科 亮, 小倉 淳
    • Organizer
      NGS現場の会第5回研究会 仙台
    • Related Report
      2017 Research-status Report
  • [Presentation] Nanopore MiniONで共生クロレラのゲノムを決めてみました! ―サンガーシーケンサーで決定されたゲノムにMiniONは勝てるのか?2017

    • Author(s)
      嶺井 隆平, 保科 亮, 小倉 淳
    • Organizer
      生命情報科学若手の会第9回大会 蒲郡
    • Related Report
      2017 Research-status Report
  • [Presentation] ロングリードNGS MinIONを用いた中型ゲノムパイプラインの構築 ~共生藻類Chlorella variabilisのゲノム決定をとおして~2017

    • Author(s)
      嶺井 隆平, 保科 亮, 小倉 淳
    • Organizer
      日本分子生物学会第40回大会 神戸
    • Related Report
      2017 Research-status Report
  • [Presentation] クロレラゲノムに挿入された巨大ウイルスPBCV-1の化石ゲノムの考察2017

    • Author(s)
      村瀬 佳乃, 福本 龍馬, 嶺井 隆平, 保科 亮, 小倉 淳
    • Organizer
      日本分子生物学会第40回大会 神戸
    • Related Report
      2017 Research-status Report
  • [Presentation] 朽木付着菌の分泌するセルラーゼ: 種の同定とセルラーゼの分離2016

    • Author(s)
      河上 悠太郎, 濱田 貴司, 保科 亮, 宇佐美 昭二, 池村 淑道, 三輪 正直, 西 義介
    • Organizer
      日本分子生物学会第39回大会
    • Place of Presentation
      パシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2016-11-30
    • Related Report
      2016 Research-status Report
  • [Presentation] クロレラ共生種・自由生活種、そして巨大ウイルスウイルスのゲノム比較から迫るゲノム共進化とウイルス抵抗性獲得機構2016

    • Author(s)
      嶺井 隆平, 秋月 祐輝, 植田 侑希, 保科 亮, 小倉 淳
    • Organizer
      日本分子生物学会第39回大会
    • Place of Presentation
      パシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2016-11-30
    • Related Report
      2016 Research-status Report
  • [Presentation] Genomic changes of symbiont for the multi-algae retaining protists2016

    • Author(s)
      Atsushi Ogura, Yuki Akizuki, Ryuhei Minei, Ryo Hoshina
    • Organizer
      VI Euro Evo Devo,
    • Place of Presentation
      Uppsala, Sweden
    • Year and Date
      2016-07-26
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Ocher-colored granules in the ciliate Cyclotrichium sp. are evidently diatom chloroplasts2016

    • Author(s)
      Ryo Hoshina, Toshinobu Suzaki, Yasushi Kusuoka
    • Organizer
      Annual meeting International Society of Protistologists/21st International Society for Evolutionary Protistology
    • Place of Presentation
      Moscow, Russia
    • Year and Date
      2016-06-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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