Elucidation of mechanisms underlying the effects of temperature condition on petal morphology in Eustoma.

• Project/Area Number: 24780037
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Horticulture/Landscape architecture
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: Kawakatsu Kyoko 国立研究開発法人農業・食品産業技術総合研究機構, 野菜花き研究部門 花き遺伝育種研究領域, 主任研究員 (60581733)
• Project Period (FY): 2012-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2013: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
• Keywords: 花弁 / トルコギキョウ / 温度 / 花弁数 / 花弁長 / 層数 / 形態形成 / 環境応答 / 温度反応

Outline of Final Research Achievements

We investigated the cultivating conditions that affect the number of petals in double flowers and the petal size in Eustoma. High temperaturejust prior to the petal initiation stage in the reproductive phase reduces the number of petals. This phenomenon applies to large varieties in Eustoma grandiflorum.Benzyladenine application as well as low temperature condition resulted in the increased number of petals. These effects were synergistic.
The petal size was influenced by the temperature condition during the reproductive phase. The analysis suggested that the genetic factor causing varietal differences of petal size contributes to the change of petal size due to temperature change.

Research Products

• [Presentation] トルコギキョウ花弁数に対する植物ホルモンの影響と遺伝的制御 (2017)
  • Author(s): 川勝恭子、牛尾亜由子、道園美弦、福田直子
  • Organizer: 平成29年度園芸学会春季大会
  • Place of Presentation: 日本大学（神奈川県・藤沢市）
  • Year and Date: 2017-03-19
• [Presentation] Genetic and environmental analysis of petal number control in Eustoma. (2017)
  • Author(s): 川勝恭子、牛尾亜由子、道園美弦、福田直子
  • Organizer: 第58回日本植物生理学会年会
  • Place of Presentation: 鹿児島大学（鹿児島県・鹿児島市）
  • Year and Date: 2017-03-16
• [Presentation] トルコギキョウ花弁数に対する昼夜温の影響 (2016)
  • Author(s): 川勝恭子・原田太郎・牛尾亜由子・福田直子
  • Organizer: 園芸学会
  • Place of Presentation: 東京農業大学
  • Year and Date: 2016-03-27
• [Presentation] トルコギキョウ花弁数に対する温度の影響 (2015)
  • Author(s): 川勝恭子・牛尾亜由子・福田直子
  • Organizer: 園芸学会
  • Place of Presentation: 徳島大学
  • Year and Date: 2015-09-26