Stimulating effects of abscisic acid (ABA) on the rice mesocotyl and exploring the mutants with elongating mesocotyl

• Project/Area Number: 26450017
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Crop production science
• Research Institution: Niigata University
• Principal Investigator: Watanabe Hajime 新潟大学, 自然科学系, 准教授 (10292351)
• Co-Investigator(Kenkyū-buntansha): 西村 実 新潟大学, 自然科学系, 教授 (60391570)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000); Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000); Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
• Keywords: 作物学 / 直播栽培 / イネ / アブシジン酸 / 出芽 / ABA / 遺伝子発現

Outline of Final Research Achievements

We investigated physiological mechanism underlying rice mesocotyl elongation treated by abscisic acid (ABA), and the effects of ABA application on growth of direct-seeded rice. The endosperm nutrient use efficiency was higher by ABA treatment than those of control. The expression levels of genes relating cell elongation were increased by ABA treatment. Mutation treatment with gamma ray resulted in occurrence of un-germinated progeny seeds. The germination and early growth of direct-seeded rice treated with ABA during soaking processes were unstable. Stable and efficient application methods of ABA regarding growth of direct-seeded rice are now in progress.

Research Products

• [Presentation] Synergistic effect of plant growth regulators on early growth in direct-seeded rice (2016)
  • Author(s): Watanabe H., Honma K., Adachi Y.
  • Organizer: KAAB International Symposium 2016
  • Place of Presentation: 新潟大学，新潟県新潟市
  • Year and Date: 2016-09-28
• [Presentation] イネ幼植物の生育における植物成長調整物質の協働作用 (2016)
  • Author(s): 渡邊肇・本間加絵・安達祐介
  • Organizer: 日本作物学会第242回講演会
  • Place of Presentation: 龍谷大学，滋賀県大津市
  • Year and Date: 2016-09-10