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Investigation of the relationship between bacterial surface roughness and marine nanoparticle attachment

Research Project

Project/Area Number 20K19960
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionJapan Agency for Marine-Earth Science and Technology (2022-2023)
Okinawa Institute of Science and Technology Graduate University (2020-2021)

Principal Investigator

YAMADA Yosuke  国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 研究員 (80773720)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords海洋細菌 / ナノサイズ粒子 / 表面性状 / 炭素循環
Outline of Research at the Start

海洋において細菌は光合成により固定された炭素の約半分を利用・分解する。この過程は大気中二酸化炭素の濃度調節にも関わる海洋炭素循環の鍵プロセスである。海水中に多量に存在するナノサイズ粒子は細菌の炭素源として重要だと指摘されているが、ナノサイズ粒子の細菌への付着についてはその制御要因が不明であり、気候変化に対する海洋炭素循環の応答を予測する上での大きな障害となっている。本申請では、応募者が先行研究により見出した新規パラメータ「細菌の表面粗さ」がナノサイズ粒子の付着にどう影響するのか詳細な解明を目指す。

Outline of Final Research Achievements

This research has been conducted with the main objective of deepening the understanding of the utilization and decomposition processes of bacterial organic matter, a key process in the marine carbon cycle, by elucidating in detail the relationship between bacterial surface roughness and the attachment of nano-sized particles. Particularly important findings have been obtained in two areas, some of which have been published (Yamada et al. 2023). 1) It has been revealed that bacterial surface roughness varies depending on the bacterial species, and there are differences in the attachment of nano-sized particles to these bacteria depending on the type of particle. 2) Among the environmental factors, water temperature and nutrient concentration have been identified as major factors influencing bacterial surface roughness variations. Further analysis will be conducted to aim for a more universal understanding of the mechanisms underlying bacterial and nano-sized particle attachment.

Academic Significance and Societal Importance of the Research Achievements

本研究はこれまでほとんど調査がされていなかった海洋細菌の表面性状に着目し、その性状把握と海洋物質循環に与える影響解明を目指した研究である。本研究により、海洋細菌の表面粗さが水温や細菌種などによって大きく異なり、ナノサイズ粒子の付着にも影響していることが明らかになった。本発見は海洋細菌に限らず、湖沼や生体内に生息する細菌にも応用できる可能性があり、普遍的な細菌生態現象の解明にもつながるかもしれない。今後はその応用の可否や海洋物質循環への影響をより深く追究することで、将来の気候変動に伴う海洋応答予測の高精度化につながる可能性も秘めている。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (19 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (11 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results) Remarks (1 results)

  • [Int'l Joint Research] スクリプス海洋研究所(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] カリフォルニア大サンディエゴ校 スクリプス海洋研究所(米国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] Functions of extracellular polymeric substances in partitioning suspended and sinking particles in the upper oceans of two open ocean systems2024

    • Author(s)
      Yamada Yosuke、Ebihara Akiko、Fukuda Hideki、Otosaka Shigeyoshi、Mitarai Satoshi、Nagata Toshi
    • Journal Title

      Limnology and Oceanography

      Volume: - Issue: 5 Pages: 1101-1114

    • DOI

      10.1002/lno.12554

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Bacterial Community Shifts during Polyp Bail-Out Induction in Pocillopora Corals2023

    • Author(s)
      Chuang Po-Shun、Yamada Yosuke、Liu Po-Yu、Tang Sen-Lin、Mitarai Satoshi
    • Journal Title

      Microbiology Spectrum

      Volume: 11 Issue: 4

    • DOI

      10.1128/spectrum.00257-23

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Bacterial surface roughness regulates nanoparticle scavenging in seawater2023

    • Author(s)
      Yamada Yosuke、Patel Nirav、Fukuda Hideki、Nagata Toshi、Mitarai Satoshi、Azam Farooq
    • Journal Title

      Limnology and Oceanography

      Volume: 68 Issue: 4 Pages: 780-789

    • DOI

      10.1002/lno.12309

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Transparent exopolymer particles in deep oceans: Synthesis and future challenges2021

    • Author(s)
      Nagata, T., Yamada, Y., Fukuda, H.
    • Journal Title

      Gels

      Volume: 7 Issue: 3 Pages: 75-75

    • DOI

      10.3390/gels7030075

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Geographic Variation of Particle Size Distribution in the Kuroshio Region: Possible Causes in the Upper Water Column2021

    • Author(s)
      Yamada, Y., Fukuda, H., Umezawa, Y., Nagata, T.
    • Journal Title

      Frontiers in Marine Science

      Volume: 8 Pages: 768766-768766

    • DOI

      10.3389/fmars.2021.768766

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Bacterial surface properties and their effects on nanoparticle scavenging in seawater2023

    • Author(s)
      Yosuke Yamada, Toshiaki Mochizuki, Nirav Patel, Farooq Azam, Satoshi Mitarai
    • Organizer
      ASLO Aquatic Sciences Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Network analysis of particle-associated microbiome revealed potential key taxa driving carbon export during a subarctic spring phytoplankton bloom2023

    • Author(s)
      Akiko EBIHARA, Hideki FUKUDA, Yosuke YAMADA, Taichi YOKOKAWA, Toshi NAGATA
    • Organizer
      ASLO Aquatic Sciences Meeting 2023
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 海洋物質循環における細菌の役割-細菌表面のナノスケール測定による新知見を交えて-2023

    • Author(s)
      山田洋輔
    • Organizer
      2023 年度日本農芸化学会中四国支部第 38 若手研究者シンポジウム
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 溶存態有機物濃度による海洋細菌の表面性状変化とナノ粒子付着の関係解明2023

    • Author(s)
      山田 洋輔, 望月 俊昭, 星野 辰彦, Nirav Patel, Farooq Azam, 福田 秀樹, 御手洗 哲司
    • Organizer
      日本海洋学会 2023年度秋季大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 海洋細菌の表面性状とナノサイズ粒子付着の関係解明2022

    • Author(s)
      山田洋輔, 望月俊昭, Nirav Patel, Farooq Azam, 御手洗哲司
    • Organizer
      2022年度日本海洋学会秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 沈降性および懸濁性海洋粒子に特徴的な原核生物群集組成の海域間比較2022

    • Author(s)
      海老原諒子, 福田秀樹, 山田洋輔, 横川太一, 永田俊
    • Organizer
      2022年度日本海洋学会秋季大会
    • Related Report
      2022 Research-status Report
  • [Presentation] 海洋沈降性粒子の微生物群集ネットワーク2022

    • Author(s)
      海老原 諒子, 福田秀樹, 山田 洋輔, 横川 太一, 永田俊
    • Organizer
      2022年度日本微生物生態学会
    • Related Report
      2022 Research-status Report
  • [Presentation] 黒潮周辺海域の表層部における粒径分布の変動特性と有機炭素の沈降フラックス との関係2022

    • Author(s)
      福田秀樹, 山田洋輔, 斎藤宏明, 永田俊
    • Organizer
      黒潮生態系とその 変動を駆動する物理・化学・生物過程シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 現場観測および顕微鏡観察・画像解析による海洋粒子の性状解明2021

    • Author(s)
      山田洋輔
    • Organizer
      日本海洋学会沿岸海洋研究会 日本海洋学会西南支部 九州沖縄地区合同シンポジウム
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 海洋細菌の表面性状がナノサイズ粒子の付着へ及ぼす影響2020

    • Author(s)
      山田 洋輔・Nirav Patel・Farooq Azam・御手洗 哲司
    • Organizer
      日本海洋学会秋季大会
    • Related Report
      2020 Research-status Report
  • [Presentation] 細菌・ウイルスによる海洋炭素循環の制御メカニズム2020

    • Author(s)
      山田 洋輔
    • Organizer
      日本地球化学会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Remarks] 細菌表面の粗さが海洋ナノ粒子の細菌への付着を制御していることが明らかに

    • URL

      https://www.jamstec.go.jp/j/about/press_release/20230131/

    • Related Report
      2022 Research-status Report

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Published: 2020-04-28   Modified: 2025-01-30  

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