Molecular genetic basis of weed seed dormancy and germination

• Project/Area Number: 20880034
• Research Category: Grant-in-Aid for Young Scientists (Start-up)
• Allocation Type: Single-year Grants
• Research Field: Crop science/Weed science
• Research Institution: National Agricultural Research Organization
• Principal Investigator: IMAIZUMI Toshiyuki National Agricultural Research Organization, 中央農研・雑草バイオタイプ・総合防除研究チーム, 契約研究員 (10509235)
• Project Period (FY): 2008 – 2009
• Project Status: Completed (Fiscal Year 2009)
• Budget Amount: ¥3,302,000 (Direct Cost: ¥2,540,000、Indirect Cost: ¥762,000); Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2008: ¥1,742,000 (Direct Cost: ¥1,340,000、Indirect Cost: ¥402,000)
• Keywords: 種子休眠 / 発芽

Research Abstract

Abscisic acid (ABA) and gibberellins (GAs) are well known to be involved in dormancy and germination control. To determine the molecular mechanism of seed dormancy in Monochoria vaginalis, a simultaneous analysis of ABA, GA and metabolites of ABA was established. We revealed a pathway of ABA catabolism playing a predominant role in seed dormancy of M.vaginalis using this method. NCED genes and ABA-GT genes which confer ABA biosynthesis or catabolism were isolated.

Research Products

• [Journal Article] Sulfonylurea-resistant biotypes of Monochoria vaginalis generate higher ultraweak photon emissions than the susceptible ones. (2009)
  • Author(s): nagaki H., T. Imaizumi, G.X. Wang, T. Tominaga, K. Kato, H. Iyozumi, H. Nukui.
  • Journal Title: Pesticide Biochemistry and Physiology 95 Pages: 117-120
  • NAID: 120001644507
• [Journal Article] Sulfonylurea-resistant biotypes of Monochoria vaginalis generate higher ultraweak photon emissions than the susceptible ones (2009)
  • Author(s): Hidehiro Inagaki, Toshiyuki Imaizumi, Guang-Xi Wang, Tohru Tominaga, Kimihiko Kato, Hiroyuki Iyozumi, Hideki Nukui
  • Journal Title: Pesticide Biochemistry and Physiology 95 Pages: 117-120
  • NAID: 120001644507
  • Peer Reviewed
• [Journal Article] Inheritance of sulfonylurea resistance in Monochoria vaginalis. (2008)
  • Author(s): Imaizumi, T., G.X. Wang, T. Tominaga
  • Journal Title: Weed Research 48 Pages: 448-45
• [Journal Article] Pollination of chasmogamous flowers and effects of light and emergence time on chasmogamy and cleistogamy in Monochoria vaginalis. (2008)
  • Author(s): Imaizumi T., G.X. Wang, T. Tominaga
  • Journal Title: Weed Biology and Management 8 Pages: 260-266
  • NAID: 10027848544
• [Journal Article] 静岡県におけるスルホニルウレア系除草剤抵抗性コナギの分布. (2008)
  • Author(s): 稲垣栄洋・今泉智通・汪光熙・冨永達
  • Journal Title: 雑草研究 53 Pages: 123-127
  • NAID: 110006975924
• [Presentation] Molecular characterization and inheritance of sulfonylurea resistance in Monochoria vaginalis. (2009)
  • Author(s): Imaizumi T., G.X. Wang, T. Ohsako, T. Tominaga.
  • Organizer: The 1st China-Japan-Korea Workshop on Pesticide Science
  • Place of Presentation: Shanghai, China
• [Presentation] イヌホタルイのスルホニルウレア系除草剤抵抗性集団における遺伝的多様性の集団間差異 (2009)
  • Author(s): 今泉智通・尾形茂・内野彰
  • Organizer: 日本雑草学会
  • Place of Presentation: 倉敷
• [Presentation] 鹿児島県の水田に発生したSU抵抗性ウキアゼナに対する各種除草剤の効果1 (2009)
  • Author(s): 伊藤健二・今泉智通・内野彰
  • Organizer: 日本雑草学会
  • Place of Presentation: 倉敷
• [Presentation] Molecular characterization and inheritance of sulfonylurea resistance in Monochoria vaginalis (2009)
  • Author(s): Toshiyuki Imaizumi, Guang-Xi Wang, Takanori Ohsako, Tohru Tominaga
  • Organizer: The 1^<st> China-Japan-Korea Workshop on Pesticide Science
  • Place of Presentation: Shanghai, China