CsIREH1 phosphorylation regulates DELLA protein affecting plant height in cucumber (Cucumis sativus)
文献类型： 外文期刊
作者： Zhao, Hongjiao 1 ; Sun, Piaoyun 1 ; Tong, Can 1 ; Li, Xiangbao 1 ; Yang, Tongwen 1 ; Jiang, Yanxin 1 ; Zhao, Bosi 1 ; Dong, Junyang 1 ; Jiang, Biao 2 ; Shen, Junjun 1 ; Li, Zheng 1 ;
作者机构： 1.Northwest A&F Univ, Coll Hort, Yangling 712100, Shaanxi, Peoples R China
2.Guangdong Acad Agr Sci, Vegetable Res Inst, Guangdong Key Lab New Technol Res Vegetables, Guangzhou 510640, Guangdong, Peoples R China
关键词： AGC protein kinase; CsIREH1; cucumber; DELLA protein; plant height
期刊名称：NEW PHYTOLOGIST （ 影响因子：8.1； 五年影响因子：10.3 ）
ISSN： 0028-646X
年卷期： 2025 年 245 卷 4 期
页码：
收录情况： SCI
摘要： Plant height is a critical agronomic trait that affects crop yield, plant architecture, and environmental adaptability. Gibberellins (GAs) regulate plant height, with DELLA proteins acting as key repressors in the GA signaling pathway by inhibiting GA-induced growth. While DELLA phosphorylation is essential for regulating plant height, the precise mechanisms underlying this process remain incompletely understood. In this study, we identified a cucumber mutant with delayed growth, which exhibited reduced sensitivity to GA treatment. Through bulked segregant analysis (BSA-seq) combined with molecular marker linkage analysis, we successfully identified and cloned the gene responsible for the dwarf phenotype, CsIREH1 (INCOMPLETE ROOT HAIR ELONGATION 1), which encodes an AGC protein kinase. Further research revealed that CsIREH1 interacts with and phosphorylates DELLA proteins, specifically targeting CsGAIP and CsGAI2. We propose that IREH1-dependent phosphorylation of DELLA proteins prevents their excessive accumulation, thereby maintaining normal plant growth. Therefore, investigating the role of IREH1-mediated DELLA phosphorylation provides valuable insights and theoretical foundations for understanding how plants regulate growth mechanisms.
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