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Seedling emergence timing: Molecular aspects of seed dormancy cycling

Research Project

Project/Area Number 16K18646
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Crop production science
Research InstitutionNational Agriculture and Food Research Organization

Principal Investigator

IMAIZUMI Toshiyuki  国立研究開発法人農業・食品産業技術総合研究機構, 中央農業研究センター, 主任研究員 (10509235)

Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords種子休眠 / 休眠サイクル / 発芽 / フェノロジー / トランスクリプトーム / 種子発芽
Outline of Final Research Achievements

In this study, I investigated transcriptome profiles during dormancy cycling in a summer annual weed, Monochoria vaginalis. Transcriptome analysis were used for a global transcript analysis of M. vaginalis seeds retrieved from a rice paddy environment. This study revealed that primary dormant seeds had a different transcriptome profile compared with secondary dormant seeds. Additionally, secondary dormant seeds of one-year old seeds had a different type of transcriptome profile compared to secondary dormant seeds in two-year old seeds. Finally, there were different types of transcriptome profiles during shallow dormant states. These results indicate that different dormant states are likely to be regulated by different mechanisms.

Academic Significance and Societal Importance of the Research Achievements

本研究成果の学術的意義は、深い種子休眠性を持つ水田雑草コナギを用いて、2年間にわたる埋土種子の遺伝子発現変動の解析により、野外における休眠サイクルの調節機構を明らかにしたことである。これまでの研究はモデル植物を用いた実験室内での研究が中心であり、本研究により自然条件における休眠調節の知見が得られた。また、本研究で用いたコナギは水田の強害雑草であり、管理の効率化のため種子休眠の予測や制御が求められている。種子休眠の予測や制御は雑草管理の方針を決定するために不可欠な情報であるため、本研究の成果は、コナギや他の雑草の管理技術を開発する基盤情報に活用できるという社会的意義を持つ。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (4 results)

All 2018 2017 2016

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

  • [Journal Article] Photoperiod throughout the maternal life cycle, not photoperiod during seed imbibition, influences germination in Arabidopsis thaliana2017

    • Author(s)
      Imaizumi Toshiyuki、Auge Gabriela、Donohue Kathleen
    • Journal Title

      American Journal of Botany

      Volume: 104 Issue: 4 Pages: 516-526

    • DOI

      10.3732/ajb.1600389

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Characterization of the transcriptome during seed dormancy cycling in Monochoria vaginalis2018

    • Author(s)
      Toshiyuki Imaizumi
    • Organizer
      18th European Weed Research Society Symposium
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of the transcriptome during seed dormancy cycling in Monochoria vaginalis using Microarrays and RNA-seq2017

    • Author(s)
      Toshiyuki Imaizumi
    • Organizer
      12th Triennial Conference The International Society of Seed Science Congerence
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Transcriptome analysis during seed dormancy cycling in Monochoria vaginalis2016

    • Author(s)
      Toshiyuki Imaizumi
    • Organizer
      7th International Weed Science Congress
    • Place of Presentation
      プラハ(チェコ共和国)
    • Year and Date
      2016-06-19
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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Published: 2016-04-21   Modified: 2020-03-30  

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