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Development and demonstration of quantification method for bacterivorous character of in situ protistan community

Research Project

Project/Area Number 17K18000
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Aquatic bioproduction science
Environmental dynamic analysis
Research InstitutionFukui Prefectural University

Principal Investigator

Kataoka Takafumi  福井県立大学, 海洋生物資源学部, 准教授 (10533482)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords水圏微生物生態学 / BrdU / 核酸標識 / 細菌捕食性原生生物 / 従属栄養原核生物 / 微生物ループ / 水圏生態系 / 炭素循環 / 原核生物 / 原生生物 / 摂餌量 / 無菌培養 / 単離株 / 二者培養 / 単離培養 / 海洋物質循環 / 海洋生態 / 環境分析 / 生態系評価
Outline of Final Research Achievements

In order to estimate the transport process of organic material from heterotrophic bacteria to bacterivorous protists (BVP), three BVPs were obtained from natural seawater and parameters for bacterivory were determined. The incorporation rates of fluorescent beads were ranged from 2.4 to 13.5 beads/cell/h among three different taxa. On the other hand, incorporation of thymidine analog, BrdU, was compared among three bacterial isolates and showed that 7~15% of thymine was replaced by BrdU although one bacterium isolate could not incorporate BrdU. Thus, it is necessary to consider the inability of BrdU incorporation in some bacteria taxa when estimating bacterial growth using BrdU.

Academic Significance and Societal Importance of the Research Achievements

多様な細菌捕食性原生生物と10種類の異なる種類の従属栄養細菌の単離株が得られたことは、環境中の有機物輸送過程を見積もるための室内実験を行うための最適な材料であり貴重な成果である。また、生物種によって最適な餌粒子サイズが異なる発見は、原生生物による細菌捕食が粒子サイズに関係していることを示しており、環境中での有機物輸送の効率を見積もる上で貴重な成果が得られたと言える。新たに合成される核酸をBrdUにより標識する技術を応用し、それらを定量することで、細菌の種類により2倍程度も標識効率が異なることを示した。細菌の種類によってBrdUの利用可能性が異なることを示すことができた。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (20 results)

All 2021 2020 2019 2018 2017

All Journal Article (7 results) (of which Peer Reviewed: 7 results,  Open Access: 5 results) Presentation (13 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] Distribution of the Harmful Bloom-Forming Cyanobacterium, <i>Microcystis aeruginosa</i>, in 88 Freshwater Environments across Japan2020

    • Author(s)
      Kataoka Takafumi、Ohbayashi Kako、Kobayashi Yuki、Takasu Hiroyuki、Nakano Shin-ichi、Kondo Ryuji、Hodoki Yoshikuni
    • Journal Title

      Microbes and Environments

      Volume: 35 Issue: 1 Pages: n/a

    • DOI

      10.1264/jsme2.ME19110

    • NAID

      130007800443

    • ISSN
      1342-6311, 1347-4405
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Depth-dependent transcriptomic response of diatoms during spring bloom in the western subarctic Pacific Ocean2019

    • Author(s)
      Suzuki Shigekatsu、Kataoka Takafumi、Watanabe Tsuyoshi、Yamaguchi Haruyo、Kuwata Akira、Kawachi Masanobu
    • Journal Title

      Scientific Reports

      Volume: 9 Issue: 1 Pages: 1-11

    • DOI

      10.1038/s41598-019-51150-8

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Data on taxonomic annotation and diversity of 18S rRNA gene amplicon libraries derived from high throughput sequencing2019

    • Author(s)
      Kataoka Takafumi、Kondo Ryuji
    • Journal Title

      Data in Brief

      Volume: 25 Pages: 104213-104213

    • DOI

      10.1016/j.dib.2019.104213

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Production of Dibromomethane and Changes in the Bacterial Community in Bromoform-Enriched Seawater2019

    • Author(s)
      Kataoka Takafumi、Ooki Atsushi、Nomura Daiki
    • Journal Title

      Microbes and Environments

      Volume: 34 Issue: 2 Pages: 215-218

    • DOI

      10.1264/jsme2.ME18027

    • NAID

      130007668536

    • ISSN
      1342-6311, 1347-4405
    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Protistan community composition in anoxic sediments from three salinity-disparate Japanese lakes2019

    • Author(s)
      Kataoka Takafumi、Kondo Ryuji
    • Journal Title

      Estuarine, Coastal and Shelf Science

      Volume: 224 Pages: 34-42

    • DOI

      10.1016/j.ecss.2019.04.046

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Collaborative environmental DNA sampling from petal surfaces of flowering cherry Cerasus?×?yedoensis ‘Somei-yoshino’ across the Japanese archipelago2018

    • Author(s)
      Tazro Ohta, Takeshi Kawashima, Natsuko O. Shinozaki, Akito Dobashi, ◯Satoshi Hiraoka, Tatsuhiko Hoshino, Keiichi Kanno, Takafumi Kataoka, Shuichi Kawashima, Motomu Matsui, Wataru Nemoto, Suguru Nishijima, Natsuki Suganuma, Haruo Suzuki
    • Journal Title

      Journal of Plant Research

      Volume: - Issue: 4 Pages: 1-9

    • DOI

      10.1007/s10265-018-1017-x

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of the Chemical Form of Antimony on Soil Microbial Community Structure and Arsenite Oxidation Activity2018

    • Author(s)
      Kataoka Takafumi、Mitsunobu Satoshi、Hamamura Natsuko
    • Journal Title

      Microbes and Environments

      Volume: 33 Issue: 2 Pages: 214-221

    • DOI

      10.1264/jsme2.ME17182

    • NAID

      130007393735

    • ISSN
      1342-6311, 1347-4405
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 細菌捕食性従属栄養鞭毛虫(HNF)の細胞濃縮方法の検討2021

    • Author(s)
      片岡剛文
    • Organizer
      日本微生物生態学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Diversity of Microbial Arsenic and Antimony Transformation Pathways Associated with Antimony Mine Tailing2019

    • Author(s)
      Natsuko Hamamura, Yoriko Yamashita, Takafumi Kataoka, and Satoshi Mitsunobu
    • Organizer
      Goldschmidt conferecne 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 水圏の嫌気環境における従属栄養性原生生物 現存量、多様性、生理・生態2019

    • Author(s)
      近藤竜二・片岡剛文
    • Organizer
      第33回日本微生物生態学会山梨大会
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] 透過型電子顕微鏡による海産原生生物(Stramenopiles)の細胞内微細構造観察における化学固定法と急速凍結置換法の比較2019

    • Author(s)
      岸上 達哉・山田 和正・石田 香澄・吉川 伸哉・片岡剛文
    • Organizer
      第12回北陸合同バイオシンポジウム2019
    • Related Report
      2019 Research-status Report
  • [Presentation] ポリスチレンビーズを用いた海産原生生物の餌粒子サイズによる捕食選好性2019

    • Author(s)
      石田香澄・片岡剛文
    • Organizer
      日本微生物生態学会大会2019
    • Related Report
      2019 Research-status Report
  • [Presentation] 若狭湾における成層期の栄養塩供給過程2019

    • Author(s)
      本間駿・大西徹・兼田淳史・杉本亮・片岡剛文・理塀隆人・山下慎也
    • Organizer
      日本海洋学会2019秋季大会
    • Related Report
      2019 Research-status Report
  • [Presentation] メタバーコーディングによる霞ヶ浦における植物プランクトンの動態解析2018

    • Author(s)
      山口晴代・片岡剛文・中川恵・河地正伸
    • Organizer
      第83回日本陸水学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 重金属等有害元素の複合暴露に対する土壌微生物群集の応答2018

    • Author(s)
      片岡剛文
    • Organizer
      第11回北陸合同バイオシンポジウム
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] Bacterial production of organic gas in cold seawater2018

    • Author(s)
      片岡剛文・ 大木淳之・ 野村大樹
    • Organizer
      5th International Symposium on Archtic Research
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Abundance, diversity and cultivation of anaaerobic protists in anoxic lacustrine sediments2018

    • Author(s)
      近藤竜二・片岡剛文
    • Organizer
      日本微生物生態学会大会2018
    • Related Report
      2018 Research-status Report
  • [Presentation] Enrichment of marine bacteria with adding a halocarbon, Bromoform (CHBr3)2018

    • Author(s)
      片岡剛文・大木淳之・野村大樹
    • Organizer
      日本微生物生態学会大会2018
    • Related Report
      2018 Research-status Report
  • [Presentation] 嫌気的な湖底堆積物中の原生生物の群集組成2017

    • Author(s)
      片岡剛文・田仲あいら・前川鈴香・中野伸一・近藤竜二
    • Organizer
      環境微生物系学会合同大会2017
    • Related Report
      2017 Research-status Report
  • [Presentation] 大量塩基配列を用いた湖沼堆積物における真核微生物群集の解析2017

    • Author(s)
      片岡剛文・近藤竜二
    • Organizer
      日本珪藻学会第37回研究集会
    • Related Report
      2017 Research-status Report
    • Invited

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Published: 2017-04-28   Modified: 2023-01-30  

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