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Springtime photoinhibition constrains regeneration of evergreen coniferous trees

Research Project

Project/Area Number 17K19301
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Forestry and Forest Products Science, Applied aquatic science, and related fields
Research InstitutionForest Research and Management Organization

Principal Investigator

Kitao Mitsutoshi  国立研究開発法人森林研究・整備機構, 森林総合研究所, 主任研究員 等 (60353661)

Project Period (FY) 2017-06-30 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords光阻害 / 常緑針葉樹 / 開葉 / 春の光阻害 / 糖 / デンプン / トドマツ / 遺伝子発現 / メタボローム解析 / 林床稚樹 / 生理生態学
Outline of Final Research Achievements

We investigated the underlying mechanism of springtime photoinhibition in evergreen conifer species, by conducting chlorophyll fluorescence measurements, RNA-sequence data and metabolomic analyses in seedlings of Sakhalin fir (Abies sachalinensis) around budbreak. We observed springtime photoinhibition just before budbreak, indicated by a temporal decrease in the maximum photochemical efficiency of photosystem II (Fv/Fm) . Based on RNA-sequence data analysis, genes related to starch breakdown and sugar export, and oxidative stress were induced. Metabolic analysis suggests an imbalance in C/N relationship (excessive carbon to nitrogen) based on increases in 2-oxoglutaric acid and 3-phosphoglyceric acid in the photoinhibited leaves. Increased sugar concentration, which is needed for breaking bud dormancy and new leaf development, might induce photoinhibition via photosynthetic down-regulation.

Academic Significance and Societal Importance of the Research Achievements

遅霜の害として知られる常緑針葉樹の晩霜害は、新葉の開葉直前に感受性が高く、既存の葉が障害を受けることを特徴とする。晩霜害は晴天日の早朝に放射冷却によって生じることから、低温の影響だけでなく、強光による光阻害の関与が疑われてきた。クロロフィル蛍光測定により、開葉の直前に既存の葉の光阻害感受性が一時的に上昇することが明らかとなった。また、開葉直前のデンプン分解による糖濃度の一時的な上昇が、光合成のダウンレギュレーションを引き起こし、光阻害感受性を増加させることが示唆された。これらの研究成果は地球温暖化による開葉の早期化が、常緑針葉樹の晩霜害へ与える影響を予測する際の科学的知見となる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2019 2018 2017 Other

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

  • [Journal Article] Light Energy Partitioning under Various Environmental Stresses Combined with Elevated CO2 in Three Deciduous Broadleaf Tree Species in Japan2019

    • Author(s)
      Kitao Mitsutoshi、Tobita Hiroyuki、Kitaoka Satoshi、Harayama Hisanori、Yazaki Kenichi、Komatsu Masabumi、Agathokleous Evgenios、Koike Takayoshi
    • Journal Title

      Climate

      Volume: 7 Issue: 6 Pages: 79-79

    • DOI

      10.3390/cli7060079

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Sustained growth suppression in forest-floor seedlings of Sakhalin fir associated with previous-year springtime photoinhibition after a winter cutting of canopy trees2019

    • Author(s)
      Kitao Mitsutoshi、Kitaoka Satoshi、Harayama Hisanori、Agathokleous Evgenios、Han Qingmin、Uemura Akira、Furuya Naoyuki、Ishibashi Satoshi
    • Journal Title

      European Journal of Forest Research

      Volume: 138 Issue: 1 Pages: 143-150

    • DOI

      10.1007/s10342-018-1159-3

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Springtime photoinhibition constrains regeneration of forest floor seedlings of Abies sachalinensis after a removal of canopy trees during winter2018

    • Author(s)
      Kitao Mitsutoshi、Harayama Hisanori、Han Qingmin、Agathokleous Evgenios、Uemura Akira、Furuya Naoyuki、Ishibashi Satoshi
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 6310-6310

    • DOI

      10.1038/s41598-018-24711-6

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] The role of springtime photoinhibition in the regeneration of Abies sachalinensis at the forest floor after removing canopy trees2018

    • Author(s)
      KITAO Mitsutoshi、HARAYAMA Hisanori、HAN Qingmin、AGATHOKLEOUS Evgenios、UEMURA Akira、FURUYA Naoyuki、ISHIBASHI Satoshi
    • Organizer
      日本生態学会第65回全国大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 冬季伐採にともなう春季の光阻害がトドマツ前生稚樹の成長に及ぼす影響2018

    • Author(s)
      北尾光俊、原山尚徳、韓慶民、AGATHOKLEOUS Evgenios、上村章、古家直行、石橋聡
    • Organizer
      第129回日本森林学会大会
    • Related Report
      2017 Research-status Report
  • [Presentation] Plants rigidly regulate excessive energy production under various environmental stresses2017

    • Author(s)
      KITAO Mitsutoshi、TOBITA Hiroyuki、YAZAKI Kenichi、KITAOKA Satoshi、AGATHOKLEOUS Evgenios、KOIKE Takayoshi
    • Organizer
      IUFRO Tokyo 2017,Actions for sustainable forest ecosystems under air pollution and climate change
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Remarks] 上木伐採による強光ストレスはトドマツ稚樹の成長を2年にわたり抑制する

    • URL

      https://www.ffpri.affrc.go.jp/research/saizensen/2019/20190719-02.html

    • Related Report
      2019 Annual Research Report

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Published: 2017-07-21   Modified: 2021-02-19  

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