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Mechanism of breaking dormancy and transfer to reproductive phase in peach

Research Project

Project/Area Number 18K05613
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 39030:Horticultural science-related
Research InstitutionUtsunomiya University

Principal Investigator

Yamane Kenji  宇都宮大学, 農学部, 教授 (60240066)

Co-Investigator(Kenkyū-buntansha) 黒倉 健  宇都宮大学, 農学部, 講師 (10650898)
謝 肖男  宇都宮大学, バイオサイエンス教育研究センター, 准教授 (30610323)
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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords種子休眠 / エピジェネティクス / 花芽分化 / 根圏 / 種子発芽 / 低温 / DNAメチル化 / 早期開花 / 開花関連遺伝子 / 相転移 / 発芽 / 早期相転移 / アブシシン酸 / ジベレリン / 遺伝子発現
Outline of Final Research Achievements

When peach seeds were treated with a DNA methylation inhibitor for 2 weeks and then treated with an ABA synthesis inhibitor at 5 C for 2 weeks, there was no difference in germination rate, but the SPAD value of seedling leaves increased and yellowing was suppressed. DNA was extracted from seeds that had not been encountered at low temperature and seeds that had been exposed to 5 C for 8 weeks, and their methylation level was compared by the whole-genome bisulfite sequencing method. Methylation levels in the CpG, CHG and CHH sequences decreased with low temperature encounters, indicating that epigenetics is involved in peach seed dormancy. In 1-year-old seedlings, flower bud differentiation was delayed for more than 1 month than in adult trees, and flower bud differentiation was promoted as the pot size was larger. A relationship was found between the growth amount of the seedlings and the number of flower buds due to the difference in the root area.

Academic Significance and Societal Importance of the Research Achievements

モモ種子休眠にエピジェネティスクが関与していることを明らかにした点は学術的に意義がある.モモ1年生実生において鉢サイズにより生殖成長相への転換を促進できることが示されたことから,1年生実生において花芽をつけて鉢物として販売することの可能性が示された点は社会的意義を有する.

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

    (4 results)

All 2021 2020 2018

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (2 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Physiology and promotion of seed germination in ornamental peach2021

    • Author(s)
      Yamane, K., Y. Naozaki and K. Worarad.
    • Journal Title

      Acta Horticulturae

      Volume: 1312 Issue: 1312 Pages: 197-202

    • DOI

      10.17660/actahortic.2021.1312.29

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Physiology and promotion of seed germination in ornamental peach.2021

    • Author(s)
      Yamane, K., Y. Naozaki and K. Worarad.
    • Journal Title

      Acta Hortic.

      Volume: -

    • Related Report
      2020 Research-status Report
  • [Presentation] Physiology and promotion of seed germination in ornamental peach2020

    • Author(s)
      Yamane, K., Y. Naozaki and K. Worarad.
    • Organizer
      The 3rd Asian Horticultural Congress 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 観賞用モモ1年生実生の花芽分化時期と温室内鉢栽培による早期開花.2018

    • Author(s)
      山根健治・大塚みく.
    • Organizer
      園芸学会平成30年度秋季大会.
    • Related Report
      2018 Research-status Report

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

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