Elucidating the Mechanisms of Heat Shock-Induced Resistance in Horticultural Crops

2022 Fiscal Year Final Research Report

• Project/Area Number: 17K07637
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Horticultural science
• Research Institution: Ibaraki University
• Principal Investigator: Tatsuo Sato 茨城大学, 農学部, 教授 (20451669)
• Project Period (FY): 2017-04-01 – 2023-03-31
• Keywords: 熱ショック / 熱ショック転写因子 / キュウリ / トマト / 病害抵抗性 / 獲得抵抗性 / 熱ショックエレメント

Outline of Final Research Achievements

Previous studies have shown that heat shock treatment of crops at 45-50°C for several tens of seconds induces disease resistance. It has been suggested that an unknown response system in addition to the known systemic acquired resistance response is involved in its induction, either in parallel or in interaction with it. In this study, we focused on the behavior of heat shock transcription factors in cucumber and tomato, and found that heat shock transcription factors are activated earlier than the induction of systemic acquired resistance after heat shock treatment, and that localized disease resistance is expressed by binding to heat shock elements upstream of disease defense-related genes This reaction was not induced by UV irradiation.

Free Research Field

園芸学

Academic Significance and Societal Importance of the Research Achievements

薬剤などに頼らず環境ストレスの１つである熱だけで植物の病害防御に関する複数の経路を活性化し実用水準の病害抵抗性を引き出すことができることが明らかになった。本成果は環境負荷軽減型農業の推進に寄与するだけではなく、熱ショック転写因子を介した防御反応のメカニズムは植物だけではなくヒト等の動物にも存在する可能性があることから医薬品開発など他分野への応用が期待される。