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2012 Fiscal Year Final Research Report

Development and application of novel methods for diagnosis of phytoplankton physiological status

Research Project

  • PDF
Project/Area Number 22710003
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Environmental dynamic analysis
Research InstitutionThe University of Tokyo

Principal Investigator

SATO Mitsuhide  東京大学, 大学院・農学生命科学研究科, 助教 (60466810)

Project Period (FY) 2010 – 2012
Keywords生物海洋 / 植物プランクトン
Research Abstract

Various methods to diagnose phytoplankton physiological status were applied to cultured and natural phytoplankton populations and their validity was examined. In this process, some cultures of oceanic pico- and nanophytoplankton were established. Among them, it was confirmed that measurement of phosphate monoesterase and diesterase activities using fluorogenic substrates in combination with a fluorescent probe ELF-97 were very effective in detecting phosphorus limitation of phytoplankton. By applying this method in the North and South Pacific, the map of phosphorus limitation was drawn throughout the Pacific Ocean. From kinetics studies, it was found that phosphate diesters are recycled much slower than monoesters in the surface water of the tropical Pacific, which is an important result for biogeochemical cycles of phosphorus.

  • Research Products

    (4 results)

All 2013 2011

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (3 results)

  • [Journal Article] 太平洋亜熱帯海域におけるピコ・ナノ植物プランクトンサイズ2013

    • Author(s)
      佐藤光秀・橋濱史典・児玉武稔・古谷研
    • Journal Title

      2013年度日本海洋学会春季大会

    • Peer Reviewed
  • [Presentation] 太平洋亜熱帯海域におけるピコ・ナノ植物プランクトンサイズ2013

    • Author(s)
      佐藤光秀・橋濱史典・児玉武稔・古谷 研
    • Organizer
      2013年度日本海洋学会春季大会
    • Place of Presentation
      東京
    • Year and Date
      2013-03-22
  • [Presentation] Distributions of alkaline phosphatase and disphosphatase activities in the Pacific Ocean, with an emphasis on phosphorus cycling in subtropical gyres2013

    • Author(s)
      Sato, M., R. Sakuraba, and F. Hashihama
    • Organizer
      ASLO 2013 Aquatic Sciences Meeting
    • Place of Presentation
      New Orleans, USA
    • Year and Date
      2013-02-19
  • [Presentation] 太平洋亜熱帯域における植物プランクトンの増殖と制限要因2011

    • Author(s)
      佐藤光秀
    • Organizer
      東京大学大気海洋研究所共同利用研究集会 亜熱帯太平洋のプランクトン生態系および物質循環に関する比較海洋学
    • Place of Presentation
      東京
    • Year and Date
      2011-10-03

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Published: 2014-08-29  

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