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Infection mechanism of nitrogen-fixing bacteria to nonlegume and its application to construction of agriculture independent on chemical nitrogenous fertilizers

Research Project

Project/Area Number 24658076
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeSingle-year Grants
Research Field Applied microbiology
Research InstitutionSetsunan University (2013)
Kyoto University (2012)

Principal Investigator

MURATA Kousaku  摂南大学, 理工学部, 教授 (90142299)

Project Period (FY) 2012-04-01 – 2014-03-31
Project Status Completed (Fiscal Year 2013)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywordsnitrogen fixation / biofertilizer / levan / phosphate concentration / G.diazotrophicus / endophytic bacteria / 非マメ科植物 / レバン / クオラムセンシング / 活性酸素種 / エンドファイト / 窒素固定細菌 / 窒素固定 / 酢酸菌 / Gluconacetobacter / リン酸 / 細胞外多糖 / ホモセリンラクトン
Research Abstract

Due to the increasing cost of chemical nitrogenous fertilizer and concerns about contamination of soil and water, there is a need to reduce usage of chemical fertilizer. Plant-associated microorganisms containing nitrogenases have attracted attention as alternative biofertilizers, since nitrogenase catalyzes a reaction referred to as biological nitrogen fixation. Among endophytic nitrogen-fixing bacteria, we selected Gluconacetobacter diazotrophicus(Gdi) and analyzed the function as the biofertilizer. We found that, depending on the phosphate concentration in the medium, this bacterium produces copious amount of polyssacharide levan, a D-fructofuranosyl polymer, as an exopolysaccharide essential in the infection of the bacterium to the plants and in the protection of invasion of other bacteria in the environment.

Report

(3 results)
  • 2013 Annual Research Report   Final Research Report ( PDF )
  • 2012 Research-status Report
  • Research Products

    (6 results)

All 2014 2013 2012 Other

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (4 results)

  • [Journal Article] Phosphate enhances levan production in the endophytic bacterium Gluconobacter diazotrophicus Pal52014

    • Author(s)
      Nao Idogawa, Ryuta Amamoto, Kousaku Murata, Shigeyuki Kawai
    • Journal Title

      Bioengineered

      Volume: (in press)

    • Related Report
      2013 Final Research Report
  • [Journal Article] Phosphate enhances levan production in the endophytic bacterium Gluconacetobacter diazotrophicus Pal52014

    • Author(s)
      Nao Idogawa*, Ryuta Amamoto*, Kousaku Murata, Shigeyuki Kawai
    • Journal Title

      Bioengineered

      Volume: 未定 Issue: 3 Pages: 173-179

    • DOI

      10.4161/bioe.28792

    • NAID

      120005439527

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Presentation] 植物内生窒素固定細菌のリン酸に依存した細胞外多糖レバン合成とその生理的意義2013

    • Author(s)
      井戸川奈生、村田幸作、河井重幸
    • Organizer
      第4回リン化合物討論会(第31回C-P化合物研究会)
    • Place of Presentation
      滋賀大学、大津市
    • Year and Date
      2013-12-14
    • Related Report
      2013 Final Research Report
  • [Presentation] 植物内生窒素固定酢酸菌Gluconacetobacter diazotrophicusが合成する細胞外多糖様物質2012

    • Author(s)
      井戸川奈生、河井重幸、村田幸作
    • Organizer
      日本生物工学会平成24年度大会(第64回)
    • Place of Presentation
      神戸国際会議場、神戸市
    • Year and Date
      2012-10-25
    • Related Report
      2013 Final Research Report
  • [Presentation] 植物内生窒素固定細菌のリン酸に依存した細胞外多糖レバン合成とその生理的意義

    • Author(s)
      ○井戸川奈生、村田幸作、河井重幸(京大院・農)
    • Organizer
      第4回リン化合物討論会(第31回C-P化合物研究会)
    • Place of Presentation
      滋賀大学、大津市
    • Related Report
      2013 Annual Research Report
  • [Presentation] 植物内生窒素固定酢酸菌Gluconacetobacter diazotrophicusが合成する細胞外多糖様物質

    • Author(s)
      井戸川 奈生
    • Organizer
      日本生物工学会平成24年度大会(第64回)
    • Place of Presentation
      神戸市 神戸国際会議場
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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