Transcriptional regulation of a gibberellin biosynthesis gene that regulates internode elongation in rice

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K06274
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 44030:Plant molecular biology and physiology-related
• Research Institution: National Agriculture and Food Research Organization (2019-2020); Tohoku University (2018)
• Principal Investigator: Kuroha Takeshi 国立研究開発法人農業・食品産業技術総合研究機構, 生物機能利用研究部門, 研究員 (50415155)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: イネ / ゲノム編集 / ジベレリン / 節間伸長 / 洪水応答

Outline of Final Research Achievements

Plants have diverse environmental response mechanisms in response to various external environments. Rice have the ability to elongate internodes in response to not only the onset of reproductive growth caused by such as day length and temperature, but also environmental changes caused by submergence. The gibberellin synthase gene SD1 (OsGA20ox2) has been identified as a common contributor to internode elongation. In this study, we generated genome-edited lines with various deletions in the untranslated region of the SD1 gene to elucidate the regulatory mechanism of the SD1 gene expression. Through phenotypic analysis of these lines, we succeeded in obtaining the candidate region involved in the regulation of internode elongation through the expression of the SD1 gene.

Free Research Field

植物分子育種学

Academic Significance and Societal Importance of the Research Achievements

本研究成果により、イネの節間伸長の制御において重要なSD1遺伝子の発現制御機構を理解する上で大きな手がかりを得られたと言える。この成果は、植物の多様な成長戦略の解明に結びつくだけでなく、将来的にはイネをはじめとした作物における自在な草丈制御システムの構築に展開できる可能性がある。