• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Does an essntial element "phosphorus" in oceanic waters vary with microbial reduction?

Research Project

Project/Area Number 16K14962
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Aquatic bioproduction science
Research InstitutionKochi University

Principal Investigator

YAMAGUCHI Haruo  高知大学, 教育研究部自然科学系農学部門, 准教授 (10432816)

Co-Investigator(Kenkyū-buntansha) 西脇 永敏  高知工科大学, 環境理工学群, 教授 (30237763)
Research Collaborator ASAHARA Haruyasu  
HAYASHI Yoshihiro  
SUZUKI Satoshi  
YAMAMOTO Hirofumi  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords海洋 / リン酸 / 酸化 / 還元 / 微生物 / 海洋微生物 / 核磁気共鳴 / 物質循環 / リン
Outline of Final Research Achievements

This study established a quantitative method for various phosphorus compounds in seawaters, and thereby, challenged to reveal a microbial phosphate reduction in marine environments. Our method based on NMR (nuclear magnetic resonance) is capable of detecting orthophosphate, phosphite, and other phosphorus compounds in seawaters. By using an internal standard in the method, we succeeded to quantify those compounds and obtain the marine microorganisms able to utilize the oxidized/reduced phosphorus compounds for their growth. Unfortunately, no microorganism which is able to reduce orthophosphate was isolated; however, this study found a possibility that microbial phosphate reduction would potentially occur in the environments. Our results contribute to an understanding of the marine phosphorus cycle associated with microbial phosphorus redox in seawaters.

Academic Significance and Societal Importance of the Research Achievements

海洋生物生産の制御因子リンの動態を解明にすることは,それと連動する生物生産の機構を考える上で極めて重要である。本研究では,新しいツールと組み合わせた核磁気共鳴解析法を確立し,それにより多様な物質とともに存在する各種リン化合物を個別に抽出することなく,網羅的かつ定量的に把握可能とした。これによりリンの酸化・還元を担う微生物の探索が可能となり,多様なリン化合物を利用可能な海洋微生物種をあらたに見出すことができた。今後,海洋におけるリンの動態についての理解を果たし,海洋生物生産の機構解明それに基づいた制御法の開発に貢献できる点で,本研究で得られた成果は学術的かつ社会的に意義深い。

Report

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

    (5 results)

All 2017 2016 Other

All Presentation (4 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Presentation] 栄養塩欠乏に対する海洋微生物の増殖生理応答に関する研究III. 海水に含まれる正リン酸の迅速定量法の確立2017

    • Author(s)
      在間雅輝,山口晴生,足立真佐雄,浅原時泰,西脇永敏
    • Organizer
      平成29年度日本水産学会春季大会
    • Place of Presentation
      東京海洋大学(東京都港区)
    • Year and Date
      2017-03-26
    • Related Report
      2016 Research-status Report
  • [Presentation] Selective utilization of inorganic and organic phosphorus compounds by the bloom forming diatom Chaetoceros tenuissimus: new approach using a modified quantitative 31P-NMR.2017

    • Author(s)
      Masaki Zaima, Haruo Yamaguchi, Ryoko Kuramatsu, Mika Minamida, Miki Seki, Masao Adachi, Yuji Tomaru, Haruyasu Asahara and Nagatoshi Nishiwaki.
    • Organizer
      International Symposium "Fisheries Science for Future Generations" The Japanese Society of Fisheries Science
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 栄養塩欠乏に対する海洋微生物の増殖生理応答に関する研究 I. 海水培地に含まれる各種リンの網羅・定量的検出法の確立2016

    • Author(s)
      在間雅輝,山口晴生,浅原時泰,西脇永敏,南田美佳,関 美樹,足立真佐雄
    • Organizer
      平成28年度日本水産学会秋季大会
    • Place of Presentation
      近畿大学(奈良市中町)
    • Year and Date
      2016-09-08
    • Related Report
      2016 Research-status Report
  • [Presentation] 栄養塩欠乏に対する海洋微生物の増殖生理応答に関する研究 II. 海産珪藻Chaetoceros tenuissimusの選択的リン利用能2016

    • Author(s)
      山口晴生,倉松涼子,在間雅輝,浅原時泰,西脇永敏,足立真佐雄
    • Organizer
      平成28年度日本水産学会秋季大会
    • Place of Presentation
      近畿大学(奈良市中町)
    • Year and Date
      2016-09-08
    • Related Report
      2016 Research-status Report
  • [Remarks] 水族環境学研究室(水質汚濁,赤潮,魚毒性中毒・貝毒,バイオ燃料)

    • URL

      http://www.cc.kochi-u.ac.jp/~yharuo/laques/index.html

    • Related Report
      2018 Annual Research Report 2017 Research-status Report 2016 Research-status Report

URL: 

Published: 2016-04-21   Modified: 2021-01-27  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi