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Strategy to control flowering gene expression in masting trees based on identification of individual roots

Research Project

Project/Area Number 20H00436
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 40:Forestry and forest products science, applied aquatic science, and related fields
Research InstitutionForest Research and Management Organization

Principal Investigator

Han Qingmin  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 (40391180)

Co-Investigator(Kenkyū-buntansha) 宮澤 真一  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 (10578438)
壁谷 大介  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 (30353650)
野口 享太郎  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 (70353802)
佐竹 暁子  九州大学, 理学研究院, 教授 (70506237)
松本 麻子  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 (90353862)
飯尾 淳弘  静岡大学, 農学部, 准教授 (90422740)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥44,980,000 (Direct Cost: ¥34,600,000、Indirect Cost: ¥10,380,000)
Fiscal Year 2023: ¥8,450,000 (Direct Cost: ¥6,500,000、Indirect Cost: ¥1,950,000)
Fiscal Year 2022: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
Fiscal Year 2021: ¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Fiscal Year 2020: ¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Keywords生態・生物多様性 / 結実豊凶 / 根圏 / 遺伝子情報 / 窒素代謝 / 資源動態 / 遺伝情報 / 糖分組成
Outline of Research at the Start

気候変動による森林生態系における物質循環への影響に関する研究の多くは樹冠中心に行われ、地下の生態系は「ブラックボックス」とされてきた。しかし、葉や果実の分解や細根から栄養塩の吸収など地下生態系の諸プロセスは、森林生態系の物質循環の駆動力であると注目されつつある。そこで本研究では、遺伝情報に基づく個体毎の樹冠-細根-菌根菌共生系の空間分布の解明、地上部-地下部間の窒素・炭素資源動態の経時変動パターンの解明に取り組む。これらと花芽形成および窒素代謝に関わる遺伝子発現の因果関係を検出することにより、植物-土壌系の窒素循環が結実豊凶現象を制御する仕組みの解明を目指す。

Outline of Final Research Achievements

To elucidate the mechanisms underlying the masting phenomenon, it is essential to uncover the "black box" of belowground nitrogen dynamics. In a Fagus crenata forest, we identified the fine-root distribution of six individual trees using genetic markers. Our findings suggest that masting may result from evolutionary selection favoring insulation from spatial heterogeneity in soil nutrient availability, thereby enhancing reproductive success. Inorganic nitrogen is implicated as a potential trigger for floral bud initiation. Additionally, we clarified the role of non-structural carbohydrates in supporting mast seeding. These results have been published in six international journals. Furthermore, six collaborative studies with international teams, aimed at understanding the evolutionary regulation of resource allocation in woody plant reproduction, were published in leading scientific journals.

Academic Significance and Societal Importance of the Research Achievements

本研究成果は、根圏を可視化し、地上部の樹冠と地下部の根圏共生系を統合した“個体”を識別できた初めての知見であり、樹木の結実豊凶メカニズムの全貌解明を画期的に進展させるだけでなく、個体間の競争・共生に関わる学問分野や陸域の炭素・窒素などの物質循環の研究を飛躍的に発展させるものである。ブナなどの堅果類樹木の結実間隔や着果量の予測だけでなく、今後予想される気候変動に対応したブナ林の天然更新や保全技術の開発、さらにはツキノワグマなどブナの結実に依存する野生生物の保護や管理手法の策定など、幅広い分野での応用面においても大いに貢献することが期待される。

Report

(6 results)
  • 2024 Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (23 results)

All 2024 2023 2022 2021 2020

All Journal Article (8 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 8 results,  Open Access: 5 results) Presentation (14 results) (of which Int'l Joint Research: 1 results) Book (1 results)

  • [Journal Article] Evolutionary ecology of masting: mechanisms, models, and climate change2024

    • Author(s)
      Bogdziewicz M, HAN Q (31人中11番目)
    • Journal Title

      Trends in Ecology and Evolution

      Volume: 39 Issue: 9 Pages: 851-862

    • DOI

      10.1016/j.tree.2024.05.006

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The Relationship Between Maturation Size and Maximum Tree Size From Tropical to Boreal Climates2024

    • Author(s)
      Journe V, Han Q (100人中41番目)
    • Journal Title

      Ecology Letters

      Volume: 27 Issue: 9 Pages: 1-13

    • DOI

      10.1111/ele.14500

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fruiting phenology uncoupled from seasonal soil nitrogen supply in masting Fagus crenata trees2024

    • Author(s)
      Han Q, Kabeya D, Inagaki Y, Noguchi K, Fujii K, Satake A
    • Journal Title

      Plant and Soil

      Volume: - Issue: 1-2 Pages: 237-248

    • DOI

      10.1007/s11104-024-06859-5

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Resource allocation strategies in the reproductive organs of Fagaceae species2023

    • Author(s)
      Wang Y, Han Q, Kitajima K, Kurokawa H, Shimada,T, Yamaryo T, Kabeya D, Kawasaki T, Satake A
    • Journal Title

      Ecological Research

      Volume: 38 Issue: 2 Pages: 306-316

    • DOI

      10.1111/1440-1703.12350

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Seasonal patterns of sugar components and their functions in branches of Fagus crenata in association with three reproduction events2023

    • Author(s)
      Kebeya D, Han Q
    • Journal Title

      Ecological Research

      Volume: 38 Issue: 6 Pages: 782-794

    • DOI

      10.1111/1440-1703.12370

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Globally, tree fecundity exceeds productivity gradients2022

    • Author(s)
      Journe Valentin, et al. (全94人中37番目にK. Hoshizaki)
    • Journal Title

      Ecology Letters

      Volume: 25 Issue: 6 Pages: 1471-1482

    • DOI

      10.1111/ele.14012

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Limits to reproduction and seed size-number trade-offs that shape forest dominance and future recovery2022

    • Author(s)
      Qiu T., et al. (全99人中37番目にK. Hoshizaki)
    • Journal Title

      Nature Communications

      Volume: 13 Issue: 1 Pages: 2381-2381

    • DOI

      10.1038/s41467-022-30037-9

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Reproduction affects partitioning between new organs of a pulse of 15N applied during seed ripening in Fagus crenata2020

    • Author(s)
      Han Q, Kabeya D and Inagaki Y
    • Journal Title

      New Forests

      Volume: - Issue: 5 Pages: 739-752

    • DOI

      10.1007/s11056-019-09757-2

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Presentation] Relating in situ ion-exchange membrane measurements to forest nutrient supply and productivity2024

    • Author(s)
      Bremer E, Littke K, Han Q
    • Organizer
      Annual meeting of the Canadian Society of Soil Science (CSSS)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Tracking the flow of nutrients in forest ecosystems using plant root simulator (PRS) probes2024

    • Author(s)
      Green K, Bremer E, Littke K, Han Q
    • Organizer
      79th SWCS International Annual Conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ブナのマスティングが樹冠構造と光環境・下層木の成長に与える影響2024

    • Author(s)
      菅野千潤、楢本正明、上村真由子、韓慶民、飯尾淳弘
    • Organizer
      日本森林学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Influence of masting on resource dynamics in fine roots of Fagus crenata individuals identified using molecular markers2024

    • Author(s)
      Han Q, Matsumoto A, Kabeya D, Miyazawa S-I, Noguchi K
    • Organizer
      日本森林学会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 長期観測データから読み解く貯蔵炭素の樹木結実への貢献度2022

    • Author(s)
      韓慶民、壁谷大介、稲垣善之、香川聡、 飯尾淳弘
    • Organizer
      日本生態学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] タブレット3Dスキャナを用いた広葉樹毎木調査の精度評価2022

    • Author(s)
      上村真由子、根岸奏人、飯尾淳弘、韓慶民、山口圭司
    • Organizer
      日本生態学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] ブナ倒木の微生物群集構造と分解速度への分解年数の影響評価2022

    • Author(s)
      佐藤大地、上村真由子、飯尾淳弘、韓慶民
    • Organizer
      日本生態学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 標高の異なるブナ林における落葉と角材の分解呼吸速度の制御要因2022

    • Author(s)
      根岸奏人、上村真由子、飯尾淳弘、韓慶民
    • Organizer
      日本生態学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 標高の異なるブナ林における有機物分解への積雪の影響2022

    • Author(s)
      上野美桜、上村真由子、飯尾淳弘、韓慶民
    • Organizer
      日本生態学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 標高と積雪量の異なるブナ林における材の分解速度と制御要因2022

    • Author(s)
      白旗智紘、上村真由子、飯尾淳弘、韓慶民
    • Organizer
      日本生態学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 繁殖が影響するブナの枝における可溶性糖分組成の季節変動2022

    • Author(s)
      壁谷大介、韓慶民
    • Organizer
      日本生態学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 標高と積雪量の異なるブナ林における落葉の分解速度と制御要因2022

    • Author(s)
      高木優希人、上村真由子、飯尾淳弘、韓慶民
    • Organizer
      日本生態学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 苗場山ブナ林における細根への窒素分配2022

    • Author(s)
      野口享太郎、韓慶民、壁谷大介、稲垣善之、藤井一至
    • Organizer
      日本森林学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ブナ林の土壌炭素・窒素動態における微生物代謝回転の役割2022

    • Author(s)
      藤井一至、Zheng Jinsen、野口亨太郎、壁谷大介、稲垣善之、松本麻子、韓慶民
    • Organizer
      日本森林学会
    • Related Report
      2021 Annual Research Report
  • [Book] 森林学の百科事典2021

    • Author(s)
      (一社)日本森林学会
    • Total Pages
      694
    • Publisher
      丸善出版
    • ISBN
      9784621305843
    • Related Report
      2020 Annual Research Report

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Published: 2020-04-28   Modified: 2026-01-16  

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