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Responses of stomata and xylem parenchyma cells to abrupt water disappearance in xylem of saplings infected with pine wilt disease

Research Project

Project/Area Number 23780190
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Wood science
Research InstitutionForestry and Forest Products Research Institute

Principal Investigator

YAZAKI Kenichi  独立行政法人森林総合研究所, 植物生態研究領域, 主任研究員 (30353890)

Research Collaborator TAKANASHI Takuma  森林総合研究所, 森林昆虫研究領域, 主任研究員 (60399376)
KANZAKI Natsumi  森林総合研究所, 森林微生物研究領域, 主任研究員 (70435585)
Project Period (FY) 2011-04-28 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords松枯れ / cryo-SEM / 木部柔細胞 / vulnerability curve / 水ポテンシャル / 光合成 / 透水係数 / A/Ci曲線 / マツノザイセンチュウ / 気孔 / 木部通水コンダクタンス / キャビテーション / 気孔反応 / 低温走査型電子顕微鏡
Outline of Final Research Achievements

To clarify the physiological mechanism of a tree death caused by pine wilt disease, the relationship between the physiological traits of needles and the hydraulic traits of xylem in the saplings of Pinus thumbergii inoculated with pine wood nematodes was investigated. Water dynamics in tracheids was also investigated by using cryo-SEM to examine the status of parenchyma cells.
Inoculated saplings decreased in stomatal conductance with their embolisms occured from the surrounding cells of resin canals, but maintained high daily water potential (ψ) until the disease symptom was visible. No relationship between water dynamics of tracheids and the deterioration of adjacent parenchyma cells was observed. Controled saplings under ceased irrigation conserved water in tracheids despite their decreasing in ψ, and they showed recovery of gas exchanges by re-irrigation. In conclusion, abnormal embolism would not be avoided by the stomatal closure and obstruct drought resistance of pine saplings.

Report

(5 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • 2011 Research-status Report
  • Research Products

    (5 results)

All 2015 2014 2013

All Presentation (5 results) (of which Invited: 1 results)

  • [Presentation] 乾燥からの回復におけるクロマツ苗木の水ポテンシャル変化と木部内水分挙動2015

    • Author(s)
      矢崎健一、大曽根陽子、丸田恵美子、種子田春彦、大塚晃弘、佐々木駿、小笠真由美、飛田博順、北尾光俊
    • Organizer
      日本森林学会大会
    • Place of Presentation
      北海道大学
    • Year and Date
      2015-03-28
    • Related Report
      2014 Annual Research Report
  • [Presentation] 乾燥ストレスおよび回復時におけるクロマツ苗木の光合成および水分特性2014

    • Author(s)
      矢崎健一、大曽根陽子、小松雅史、飛田博順、北尾光俊
    • Organizer
      第125回日本森林学会
    • Place of Presentation
      埼玉県大宮市
    • Related Report
      2013 Research-status Report
  • [Presentation] マツ材線虫病に罹病したクロマツ苗木の木部内水分挙動と木部生細胞の同所的観察2014

    • Author(s)
      矢崎健一、小松雅史、神崎菜摘、高梨琢磨、飛田博順、北尾光俊
    • Organizer
      第64回日本木材学会大会
    • Place of Presentation
      愛媛大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 木部の通水機能と葉の生理特性2013

    • Author(s)
      矢崎 健一
    • Organizer
      日本木材学会組織と材質研究会2013年秋季シンポジウム
    • Place of Presentation
      北海道大学
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] 乾燥下でマツノザイセンチュウに感染したクロマツ苗木の水利用および光合成特性の関係2013

    • Author(s)
      矢崎健一、小松雅史、神崎菜摘、高梨琢磨、内海泰弘、石田厚、北尾光俊
    • Organizer
      第124回日本森林学会大会
    • Place of Presentation
      岩手大学
    • Related Report
      2012 Research-status Report

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Published: 2011-08-05   Modified: 2019-07-29  

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