数字农科院2.0

HS1 Enhances Rice Heat Tolerance Through Maintenance of Chloroplast Function and Reactive Oxygen Species Homeostasis

文献类型： 外文期刊

作者： Wang An; Shao Zhengji; Liu Ying; Zhang Guangheng; Zhu Li; Hu Jiang; Qian Qian; Ren Deyong

关键词： HS1;Heat Tolerance;Chloroplast Function;ROS;rice

期刊名称： Rice Science

ISSN： 1672-6308

年卷期： 2025 年

页码：

收录情况： SCIE（2025版） ; ; CSCD（2025-2026年度） ; ; 科技核心（2024版） ; ; 农林核心（2024版）

摘要： Global warming poses a severe threat to rice production and food security. We identified a heat-sensitive mutant hs1 through largescale screening of an established rice mutant library, and subsequently cloned the gene HS1, which confers thermotolerance in rice. HS1 is localized to the chloroplast and functions by preserving chloroplast integrity under elevated temperatures through stabilizing the photosystem I subunit protein PsaC. Loss of HS1 function in the hs1 mutant leads to severe structural damage to the chloroplast under heat stress, accompanied by intracellular accumulation of reactive oxygen species (ROS), which in turn triggers DNA damage and leaf albinism, ultimately manifesting as a heat-sensitive phenotype. Collectively, these findings elucidate the molecular mechanism by which HS1 responds to high temperatures and regulates thermotolerance in rice, providing new germplasm resources and a theoretical basis for breeding heat-tolerant rice varieties.

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