Molecular regulation of dormancy cycling: abscisic acid catabolism regulated by conjugation pathway

• Project/Area Number: 24780017
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Crop science/Weed science
• Research Institution: National Agriculture and Food Research Organization
• Principal Investigator: IMAIZUMI Toshiyuki 独立行政法人農業・食品産業技術総合研究機構, 中央農業総合研究センター生産体系研究領域, 研究員 (10509235)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Project Status: Completed (Fiscal Year 2014)
• Budget Amount: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000); Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 種子休眠 / 休眠サイクル / 埋土種子 / 発芽

Outline of Final Research Achievements

Using simultaneous analysis of different classes of phytohormones and comprehensive transcriptome analysis over the dormancy cycle of Monochoria vaginalis seeds in the field, we investigated the molecular regulation of dormancy cycling. Phytohormone contents within seeds showed less seasonal changes and were not linked to the dormancy cycling. Transcriptome analysis identified candidate genes involved in dormancy cycling and the transcriptome dynamics were linked to not only seasonal changes but also seed age.

Research Products

• [Presentation] コナギ埋土種子におけるトランスクリプトームの季節変動と休眠サイクルの関係 (2014)
  • Author(s): 今泉智通
  • Organizer: 日本雑草学会
  • Place of Presentation: 法政大学（東京都小金井市）
• [Presentation] 種子休眠と環境の交互作用：過室条件が夏畑雑草種子の出芽動態に与える影響 (2013)
  • Author(s): 今泉智通・渡邊寛明・浅井元朗
  • Organizer: 日本雑草学会
  • Place of Presentation: 京都大学農学研究科（京都府京都市）
• [Presentation] Effects of excessive soil moisture on seedling emergence of upland weeds (2013)
  • Author(s): 今泉智通・渡邊寛明・浅井元朗
  • Organizer: European Weed Research Society Symposium
  • Place of Presentation: Ondokuz Maysis University (Samsun, Turkey)
• [Presentation] コナギ埋土種子における休眠状態と遺伝子発現プロファイルの季節変動 (2013)
  • Author(s): 今泉智通・内野彰
  • Organizer: 種生物学会シンポジウム
  • Place of Presentation: 別府市ふれあい広場サザンクロス（大分県別府市）
• [Presentation] 湛水が夏畑雑草種子に与える影響 ー土中と地表の違いー (2012)
  • Author(s): 今泉智通・渡邊寛明・浅井元朗・内野彰
  • Organizer: 日本雑草学会
  • Place of Presentation: 農林水産技術会議事務局 筑波事務所（つくば市）
• [Presentation] Effects of excessive soil moisture and submerging on seed viability and dormancy and seedling emergence of upland weeds (2012)
  • Author(s): Imaizumi T, Watanabe H, Asai M, Uchino A
  • Organizer: International Weed Science Congress
  • Place of Presentation: New Century Grand Hotel (Hangzhou, China)