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Investigation of Petal Enlargement Mechanisms and Improvement of Cut Flower Quality Based on Substance Dynamics within Rose Plants

Research Project

Project/Area Number 21K05561
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 InstitutionGifu University

Principal Investigator

Yamada Kunio  岐阜大学, 応用生物科学部, 教授 (30345871)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsバラ / 切り花 / 鑑賞期間 / 道管流速度 / 植物ホルモン / バラ切り花 / 品質 / 花弁成長 / 茎流速度 / 開花 / 糖代謝
Outline of Research at the Start

バラ切り花の開花(花弁成長)は、花弁細胞に糖質が蓄積するとともに細胞壁が緩むことで、花弁細胞内に水が流入し細胞が肥大することで引き起こされる。バラ切り花を収穫後にも大きく開花させるためには、切り花として収穫する前に細胞分裂による花弁細胞数の確保と、その各細胞へ十分に糖を蓄積させることが重要である。本研究では、まずバラ樹体内での水・糖・植物ホルモンといった物質の流れを明らかにし、花弁の成長(細胞分裂・肥大)を促す仕組みを解明したい。その上で、花弁成長にかかわる「糖代謝」活性化や「細胞壁の緩み」を効果的に誘導し、切り花品質の改善を目指す。

Outline of Final Research Achievements

Compared to flowers on the plant, cut roses have issues with a shorter period during which they can be enjoyed and incomplete blooming. Flowering is the phenomenon where petal tissue expands and lengthens due to the inflow of water into the petal cells, but the specifics of how water flows from the stem to the petals are not clear. In this study, we conducted a detailed analysis of the fluctuations in plant hormone content in the petals and the flow of water to the petals in relation to the movement of substances into the petals. The results of this study revealed differences in the fluctuations of plant hormone content in petals during flowering between rose flowers on the plant and cut flowers. It was also found that the flow of water in the pedicel of cut roses increases rapidly during the light period and is suppressed during the dark period, suggesting that water flows into the floral organs before significant petal growth caused by light exposure.

Academic Significance and Societal Importance of the Research Achievements

本研究により,バラ花弁成長に伴う植物ホルモン含量の変動および収穫後の切り花における開花に伴う水の変動の特徴について基礎的知見を得られたことから,今後切り花の冷蔵保管のあり方や前処理剤の添加方法について検討していきたい.さらに,市販の切りバラ用鮮度保持剤に代わる新たな切り花延命剤の開発につながる基礎的知見についても得られ,今後の応用研究につながることが期待される.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2024 2023 2022 2021

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (3 results)

  • [Journal Article] Individual differences in disease progression of rose crown gall disease in a cross population between tetraploid Rosa multiflora and R. ‘PEKcougel’2024

    • Author(s)
      Ochiai Masaki、Maruyama Daiki、Haruyama Junpei、Yamada Kunio
    • Journal Title

      Acta Horticulturae

      Volume: Accepted

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Evaluation of Crown Gall Disease Resistance in Hybrids of <i>Rosa</i> ‘PEKcougel’ and Tetraploid of <i>R. multiflora</i> ‘Matsushima No. 3’2021

    • Author(s)
      Wu Weijun、Ochiai Masaki、Nakatsuka Takashi、Yamada Kunio、Fukui Hirokazu
    • Journal Title

      The Horticulture Journal

      Volume: 90 Issue: 1 Pages: 122-129

    • DOI

      10.2503/hortj.UTD-229

    • NAID

      130007975579

    • ISSN
      2189-0102, 2189-0110
    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Individual differences in disease progression of rose crown gall disease in a cross population between tetraploid Rosa multiflora and R. ‘PEKcougel’2023

    • Author(s)
      Ochiai Masaki、Maruyama Daiki、Haruyama Junpei、Yamada Kunio
    • Organizer
      The 4th Asian Horticultural Congress
    • Related Report
      2023 Annual Research Report
  • [Presentation] バラ切り花の日持ち性に及ぼす硝酸添加処理水の影響2022

    • Author(s)
      髙橋勝之心, 手島脩作, 堤琢真, 宮原由紀, 坂東隆宏, 山内高弘, 滝川浩史, 姜Shan, 落合正樹, 山田邦夫, 井出健太郎, 大石智明, 爪光男
    • Organizer
      園芸学会東海支部令和4年度研究発表会
    • Related Report
      2022 Research-status Report
  • [Presentation] バラ切り花の開花におよぼす植物ホルモンの影響2021

    • Author(s)
      山口真奈・小木曽有紗・蔵角育実・辻田実希・落合正樹・山田邦夫
    • Organizer
      園芸学会令和3年度秋季大会
    • Related Report
      2021 Research-status Report

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Published: 2021-04-28   Modified: 2025-01-30  

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