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Investigation of environmental and genetic factors to regulate on nutritropism in plant roots

Research Project

Project/Area Number 18K14365
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 38010:Plant nutrition and soil science-related
Research InstitutionThe University of Tokyo

Principal Investigator

Yamazaki Kiyoshi  東京大学, 大学院農学生命科学研究科(農学部), 特任助教 (20611297)

Project Period (FY) 2018-04-01 – 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 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords屈性 / 栄養 / 植物根 / 濃度勾配 / 不均一環境 / 局所応答 / 栄養屈性 / 栄養応答 / イネ / 根
Outline of Final Research Achievements

In order to characterize a novel tropism in rice lateral and main roots, which is named “nutritropism”, major purposes are to investigate environmental and genetic factors to regulate nutritropism. As the results, it was found that ammonium gradient is the stimulus for nutritropism in lateral and main roots. Interestingly, only ammonium among the essential nutrients for plants, caused nutritropism. Mutant analysis revealed that a phytohormone transporter plays a critical role in nutritropism.
In the case of main roots, quantifications of nutritropic responses revealed that Pi enhances nutritropism toward ammonium although Pi did not stimulate nutritropism. In the presence of Pi, main roots required higher stimulation of ammonium to cause nutritropism.

Academic Significance and Societal Importance of the Research Achievements

学術的意義として、栄養屈性はこれまで誰も実験的に示した例のない新規屈性である。最も研究が進んでいる屈性はすべて、植物が生存に必須な資源のうち、水と光、を効率よく獲得するために有用な機能であると理解されている。栄養屈性の存在は、植物が少なくともアンモニウムの濃度勾配を感知でき、よりその栄養濃度が高い方向へと根の伸長方向を変えて生育することで効率的に必須な資源である栄養を吸収しようとしていることを示した。
栄養屈性をコントロールできれば、農業において作物に効率的に肥料成分を吸収させることで施肥効率を向上させることが将来的に可能になるかもしれない。

Report

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

    (10 results)

All 2022 2020 2019 Other

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (7 results) Remarks (1 results)

  • [Journal Article] The Effect of Phosphate on the Activity and Sensitivity of Nutritropism toward Ammonium in Rice Roots2022

    • Author(s)
      Kiyoshi Yamazaki, Toru Fujiwara
    • Journal Title

      Plants

      Volume: 11 Issue: 6 Pages: 733-733

    • DOI

      10.3390/plants11060733

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A positive tropism of rice roots toward a nutrient source2020

    • Author(s)
      Kiyoshi Yamazaki, Yoshihiro Ohmori, Toru Fujiwara.
    • Journal Title

      Plant Cell Physiol.

      Volume: 61 Issue: 3 Pages: 546-553

    • DOI

      10.1093/pcp/pcz218

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] イネの栄養屈性の反応特性について2020

    • Author(s)
      山崎清志
    • Organizer
      ~植物構造オプト~ 若手の会
    • Related Report
      2020 Research-status Report
  • [Presentation] A Positive Tropism of Rice Roots toward a Nutrient Source2020

    • Author(s)
      Kiyoshi Yamazaki, Yoshihiro Ohmori, Toru Fujiwara
    • Organizer
      第62回日本植物生理学会年会 PCP session
    • Related Report
      2020 Research-status Report
  • [Presentation] The strategy of plant survival revealed by nutritropism in rice roots2020

    • Author(s)
      Kiyoshi Yamazaki, Toru Fujiwara
    • Organizer
      第62回日本植物生理学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] イネの根における栄養屈性2020

    • Author(s)
      山崎清志,大森良弘,高橋宏和,中園幹夫,藤原徹
    • Organizer
      第61回日本植物生理学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] イネの根が示す栄養屈性の特徴とその役割2020

    • Author(s)
      大森良弘、山崎清志、藤原徹
    • Organizer
      人日本育種学会第137回講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] 栄養濃度勾配に応答する植物根の新規屈性である 栄養屈性の特性2019

    • Author(s)
      山崎清志・大森良弘・藤原徹
    • Organizer
      土壌肥料学会2019年度静岡大会
    • Related Report
      2019 Research-status Report
  • [Presentation] 栄養屈性変異体のスクリーニングと温度に対する栄養屈性の変化2019

    • Author(s)
      名倉涼平・山崎清志・藤原徹
    • Organizer
      土壌肥料学会2019年度静岡大会
    • Related Report
      2019 Research-status Report
  • [Remarks] 植物の栄養屈性の発見 〜土の中の栄養のありかを探り当てる植物の新機能〜

    • URL

      https://www.a.u-tokyo.ac.jp/topics/topics_20191213-2.html

    • Related Report
      2019 Research-status Report

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Published: 2018-04-23   Modified: 2023-01-30  

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