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Mechanisms of drought resistance in conifers: decrease and recovery of water transport under different drought intensities.

Research Project

Project/Area Number 18K05729
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40010:Forest science-related
Research InstitutionOkayama University

Principal Investigator

Miki Naoko  岡山大学, 環境生命科学学域, 教授 (30379721)

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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords水輸送 / 通水阻害 / 乾燥ストレス / 回復 / 水分布 / 乾燥地 / 針葉樹 / 空洞化 / 再潅水 / 再灌水 / 通水抵抗 / 壁孔 / 乾燥地域 / 通水 / 乾燥抵抗性 / 壁孔壁
Outline of Final Research Achievements

In this study, regarding to the short-term fluctuation mechanism of the xylem water transport, which is an important mechanism for drought resistance, I clarified that the decrease in the xylem water transport in conifers may be related not only to cavitation of tracheid but also to the increase in pit hydraulic resistance due to the flexibility in the pit membrane of tracheid etc., and therefore, the decrease in xylem water transport may be recoverable in the short term in conifers as well.

Academic Significance and Societal Importance of the Research Achievements

本研究は針葉樹において通水機能の短期的な回復が起こりうることを新たに提示したもので、樹木全体の通水維持機構の解明につながる極めて新規的な知見でインパクトの大きな成果であると考えられる。更に、通水阻害が乾燥に伴う樹木枯損に与える影響は非常に大きいことを踏まえると、このような機構は乾燥抵抗性機構としても非常に重要であり、乾燥地の緑化等における緑化樹種の探索や作出の観点においても非常に有意義な成果であると考えられる。

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

    (8 results)

All 2021 2020 2018 Other

All Int'l Joint Research (4 results) Journal Article (1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] 内蒙古農業大学(中国)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] 内蒙古農業大学(中国)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 内蒙古農業大学(中国)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 内蒙古農業大学(中国)

    • Related Report
      2018 Research-status Report
  • [Journal Article] Physiological and ecological responses of plants and plant communities in dryland environments2021

    • Author(s)
      Naoko H. Miki, Nobuhito Ohte
    • Journal Title

      Landscape and Ecological Engineering

      Volume: 17 Issue: 3 Pages: 243-244

    • DOI

      10.1007/s11355-021-00466-7

    • Related Report
      2021 Annual Research Report
  • [Presentation] 中国北部の乾燥・流砂環境下における匍匐性常緑針葉樹の生理生態と緑化2021

    • Author(s)
      三木直子
    • Organizer
      日本緑化工学会 乾燥地緑化研究部会 オンラインシンポジウム2021
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] 中国半乾燥地域の匍匐性針葉樹Juniperus sabina L.のポット苗木における乾燥後の水輸送機能の回復2020

    • Author(s)
      平松勅悦・三木直子・佐藤佳奈子・小笠真由美・矢崎健一
    • Organizer
      日本沙漠学会第31回学術大会
    • Related Report
      2020 Research-status Report
  • [Presentation] Hydraulic redistribution of the prostrate shrub Juniperus sabina in semiarid areas of China.2018

    • Author(s)
      Miki NH, Kubori F, Sato K, Aoki M, Yang L, Matsuo N, Zhang G, Wang L, Yoshikawa K
    • Organizer
      2018 ICLEE 9th Conference
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research

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

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