含C2域和Ca2+结合蛋白OsERG1干扰OsPYL10-OsPP2C09模块,以负面调节大米的冷却耐受性
Liyan Zhao1,2, Jingzhen Wang1,2, Xiaomeng Ji2
1State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi Key Laboratory of Sugarcane Biology, College of Agriculture, Guangxi University, Nanning, Guangxi, 530004, China.
The Plant journal : for cell and molecular biology
|February 27, 2026
概括
一种结合的蛋白质OsERG1通过与ABA受体OsPYL10的相互作用来负面调节大米冷却耐受性. 这种相互作用会破坏OsPYL10-OsPP2C09模块,影响冷应力下的酸信号传输.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 含有C2域的蛋白质 (C2DPs) 对植物发育和非生物应激反应至关重要.
- C2DPs在调节酸 (ABA) 在大米冷却压力下的信号传递中的作用在很大程度上仍未被探索.
研究的目的:
- 研究OsERG1的功能,一种新的C2DP,在米对冷却压力的反应中.
- 阐明OsERG1与ABA信号元件相互作用的分子机制,特别是OsPYL10.
主要方法:
- 酵母两杂交 (Y2H) 测试以确定蛋白质相互作用.
- 在体外和体内结合测定以确认OsERG1-OsPYL10相互作用.
- 竞争性拉下测试以评估相互作用干扰.
- RNA测序 (RNA-seq) 用于分析基因表达变化.
- 在冷却压力和ABA治疗下对转基因大米系和突变物进行表型分析.
主要成果:
- OsERG1是一种Ca2+结合蛋白,由冷应激诱导,并对大米的冷却耐受性产生负面影响.
- OsERG1直接与ABA受体OsPYL10以Ca2+和ABA依赖的方式相互作用.
- OsERG1与OsPP2C09竞争与OsPYL10结合,这表明它在调节ABA信号中的作用.
- OsERG1的过度表达和OsPYL10的突变导致在发芽期间芽生长的ABA过敏.
- 在冷却条件下,OsERG1和OsPYL10差异调节ABA生物合成和信号基因,包括OsNAC5,OsbZIP62和OsbZIP46.
结论:
- OsERG1通过调节OsPYL10-OsPP2C09 ABA信号模块,作为大米冷却耐受性的负调节器.
- 这项研究揭示了在大米冷却压力下ABA信号调节的新机制,为改善作物弹性提供了洞察力.
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