Elucidation of the extremely early-ripening mechanism of crops by disturbance of light signals and its application to smart agriculture

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K06343
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 41050:Environmental agriculture-related
• Research Institution: Okayama University
• Principal Investigator: Sugimoto Manabu 岡山大学, 資源植物科学研究所, 准教授 (20216336)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: 遠赤色光 / 極早生 / 花成促進遺伝子

Outline of Final Research Achievements

PpdH1 showed the expression peaks earlier than that of FT1 in barley causing extremely early-ripening under continuous irradiation with fluorescent light, red LED, and far-red LED, whereas VRN1 showed the expression peaks earlier than that of the flowering promoting gene FT1 in barley causing early-ripening under continuous irradiation with fluorescent light and red LED in the flowering control genes, suggesting that PpdH1 is a key gene in extremely ripening. Arabidopsis thaliana transformants containing a gene in which the PpdH1 promoter region was fused upstream of the GUS gene did not induce GUS expression under continuous irradiation with fluorescent light + red LED or continuous irradiation with fluorescent light + red LED + far red LED. It was suggested that factors such as activators induced by far red light may activate PpdH1 and promote flowering.

Free Research Field

境界農業、宇宙植物科学

Academic Significance and Societal Importance of the Research Achievements

大麦を発芽後から赤色光や遠赤色光を連続照射により花成制御遺伝子の発現パターンが異なることを明らかにした成果は、光環境と遺伝子のコントロールにより計画的に作物の収穫時期を調整するための情報を提供するものである。また、人工光環境の使用で大麦栽培が通常１年に２回行えるところが4-5回行えることになるため、交配による品種改良に必要な時間の大幅な短縮や食料増産に貢献できる。