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Elucidation and utilization of methane symbiosis system including algae

Research Project

Project/Area Number 20K06234
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40040:Aquatic life science-related
Research InstitutionJapan International Research Center for Agricultural Sciences

Principal Investigator

Aikawa Shimpei  国立研究開発法人国際農林水産業研究センター, 生物資源・利用領域, 主任研究員 (40567252)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Keywords微細藻類 / メタン酸化菌 / 物質生産
Outline of Research at the Start

湖沼は主要なメタンの自然放出源である。研究代表者はメタン酸化菌と微細藻類から成るメタンを起点とした共生系が存在する可能性を見いだした。本研究では、この共生系における生物間相互作用を明らかにすることで、水圏でのメタン循環メカニズムの理解を進め、その知見を温暖化ガス抑制技術やメタンからの物質生産技術へと昇華させることを目指す。

Outline of Final Research Achievements

The objectives of this study were to "prove a symbiotic system consisting of methane-oxidizing bacteria and microalgae" and "propose a material production technology using the symbiotic system. Microalgae growth was confirmed when water samples were collected from a domestic methane gas generating environment and cultured under conditions in which methane was the sole carbon source. In addition, metagenome analysis confirmed the growth of microalgae and methane-oxidizing bacteria. Furthermore, microalgae and methane-oxidizing bacteria grown in a methane environment were successfully separated, and it became clear that growth is promoted when microalgae are co-cultured in a methane environment. In the future, it is expected that the production of substances from methane by methane-oxidizing bacteria and microalgae will become possible through the advancement of the co-culture system.

Academic Significance and Societal Importance of the Research Achievements

メタン酸化菌と微細藻類は生育環境が近いにもかかわらず、これまでその生物間相互作用ついて言及されていない。これは両者が一般的に広く生息している微生物であること、網羅的な微生物相解析において微細藻類と細菌類を同時に対象としないことが原因であると考えられる。メタン酸化菌と微細藻類から成るメタン共生系を明らかにすることは、「メタン循環メカニズムの一端の解明」につながるため、学術的に重要であると共に、メタン共生系を活用した温暖化抑制技術やメタンからの物質生産技術などの「バイオテクノロジーの基盤」としても有望である。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (3 results)

All 2023 2022 2021

All Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Presentation] 光質・光量が藍藻・微細藻の光合成におよぼす影響2023

    • Author(s)
      藍川晋平、菓子野康浩、秋本誠志、植野嘉文、和泉自泰、小杉昭彦
    • Organizer
      第70回生態学会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] Heterotorpohic cultivation of microalgae using crude glycerol from enzymatic biodiesel production process2022

    • Author(s)
      Aikawa S., Hama, S., Kosugi, A., Ogino, C.
    • Organizer
      10th Asian conference on Biomass Sciences
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Short-term metabolic responses of a halophilic cyanobacterium Synechococcus sp. PCC 7002 after salt shock2021

    • Author(s)
      Shimpei Aikawa, Atsumi Nishida, Tomohisa Hasunuma, Jo-Shu Chang, Akihiko Kondo
    • Organizer
      World Microbe Form
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research

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Published: 2020-04-28   Modified: 2024-01-30  

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