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New opportunities for plant water economy through the interaction of CO2 environment and nutrient status

Research Project

Project/Area Number 21H02328
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 41050:Environmental agriculture-related
Research InstitutionNagoya University

Principal Investigator

Yano Katsuya  名古屋大学, 生命農学研究科, 准教授 (00283424)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,940,000 (Direct Cost: ¥13,800,000、Indirect Cost: ¥4,140,000)
Fiscal Year 2023: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2022: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Fiscal Year 2021: ¥12,740,000 (Direct Cost: ¥9,800,000、Indirect Cost: ¥2,940,000)
Keywords高CO2環境 / 水利用効率 / 蒸散 / 窒素 / リン / カリウム / 高CO2 / 老化 / 窒素形態 / ジャガイモ / 根粒非着生ダイズ / イネ / 夜間蒸散量 / CO2 / バイオマス / 栄養状態 / 植物栄養
Outline of Research at the Start

植物のバイオマス生産量と蒸散量の間には緊密な関係が存在し、バイオマス生産量=積算蒸散量×水利用効率、と表現できる。ここで水利用効率とは、蒸散量当たりのバイオマス生産量を示す。水利用効率が高いと少量の水消費でバイオマス生産が可能となり、乾燥耐性の指標となっている。ただし、水利用効率とバイオマス生産の間にはトレードオフの関係があると従来は考えられていた。しかし、高CO2環境下ではこのトレードオフが打破される可能性があり、本研究では窒素・リン栄養状態が水利用効率の向上、さらにはバイオマス生産増を可能にするかどうかを検証する。

Outline of Final Research Achievements

The study demonstrated that under doubled CO2 concentrations, CO2 uptake is possible even at low stomatal aperture, and that biomass production capacity can be doubled without an increase in transpiration. However, it is more important than ever to control the nutritional status of plants in order to achieve this, and it was clarified that the supply of nitrogen, phosphorus, and potassium, whose demand is increasing, without excess or deficiency, leads to an increase in water use efficiency, which is directly related to biomass production capacity. The study also suggested that a high CO2 environment suppresses daytime transpiration but not nighttime transpiration, and that nighttime transpiration without photosynthesis includes wasteful water consumption that is not directly related to biomass production, and that suppression of such transpiration may reduce water consumption without reducing biomass production.

Academic Significance and Societal Importance of the Research Achievements

植物のバイオマス生産能は蒸散量と水利用効率の積で表現でき、蒸散量・水利用効率あるいはその両方の増加がバイオマス生産能を向上させる。ただし、バイオマス生産能と水利用効率の間には負の相関関係が成立する場合が多いため、蒸散量の増加が重要とされてきた。これに対して本研究では、この従来の考え方が現在の相対的に低いCO2濃度では成立しても、CO2濃度が上昇する将来では必ずしも成立しない可能性を示した。高CO2環境下では水利用効率が増加しやすくなるが、この水利用効率増加が栄養状態(リン・カリウム・窒素)に強く依存すること、そして利用効率の増加が植物のバイオマス生産能をに直結しやすいことを明らかにできた。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (8 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 1 results)

  • [Journal Article] Nocturnal versus diurnal transpiration in rice plants: Analysis of five genotypes grown under different atmospheric CO2 and soil moisture conditions2023

    • Author(s)
      Yan YI & Katsuya Yano
    • Journal Title

      Agricultural Water Management

      Volume: 286 Pages: 108397-108397

    • DOI

      10.1016/j.agwat.2023.108397

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Endophytic N2 fixation in sweet potato: responses to N, P, and K inputs and visualization of 15N2 utilizing bacterial cells via Raman spectroscopy2023

    • Author(s)
      Risako Ueda & Katsuya Yano
    • Journal Title

      Biology and Fertility of Soils

      Volume: 59 Issue: 3 Pages: 275-283

    • DOI

      10.1007/s00374-023-01698-5

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Verification of water-use efficiency estimates via carbon isotope discrimination in potato under varying nutrient statuses and CO2 conditions2022

    • Author(s)
      Yan Yi & Katsuya Yano
    • Journal Title

      Physiologia Plantarum

      Volume: 174 Issue: 2

    • DOI

      10.1111/ppl.13660

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Plant growth and water economy of Solanum tuberosum in response to doubled CO2: Interaction between potassium and phosphorus2021

    • Author(s)
      Yan Yi and Katsuya Yano
    • Journal Title

      Journal of Agronomy and Crop Science

      Volume: 207 Pages: 901-912

    • NAID

      120007175372

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Revisiting Why Plants Become N Deficient Under Elevated CO2: Importance to Meet N Demand Regardless of the Fed-Form2021

    • Author(s)
      Igarashi Maaya、Yi Yan、Yano Katsuya
    • Journal Title

      Frontiers in Plant Science

      Volume: 12 Pages: 726186-726186

    • DOI

      10.3389/fpls.2021.726186

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Why do plants become N deficient under elevated CO2?2022

    • Author(s)
      Katsuya Yano
    • Organizer
      第1回西昌農村振興フォーラム
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Nitrogen and water demands for maximum growth of Solanum tuberosum under doubled CO2: interaction with phosphorus based on the demands2021

    • Author(s)
      Yan YI, Daisuke SUGIURA and Katsuya YANO
    • Organizer
      The 10th Asian Crop Science Association Conference
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Growth responses of potato to elevated CO2 under different growth stages in open-top chambers: Interaction with phosphorus supply.2021

    • Author(s)
      Yano YI and Katsuya YANO
    • Organizer
      日本土壌肥料学会2021年度北海道大会
    • Related Report
      2021 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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