与压力相关的蛋白质OsSAP5通过与大米中的OsGF14c相互作用来调节大米标题日期
Xiaobo Zhu1,2, Min Chen2, Zhang Dong1,2
1Hainan Institute, Zhejiang University, Sanya, China.
Frontiers in plant science
|September 25, 2025
概括
与压力相关的蛋白5 (OsSAP5) 通过与OsGF14c.相互作用来积极调节米头标题日期. 功能丧失的突变体由于下调的花基因而表现出延迟的方向.
科学领域:
- 植物生物学 植物生物学
- 遗传学 是一个遗传学.
- 农业学是一种农业学.
背景情况:
- 标题日期是大米的关键农学特征,影响了适应性和产量.
- 压力相关蛋白 (SAP) 已知有非生物应激反应,但它们在生殖发育中的作用尚不清楚.
研究的目的:
- 研究压力相关蛋白5 (OsSAP5) 在调节大米的功能.
- 阐明OsSAP5控制开花时间的分子机制.
主要方法:
- 在大米中产生功能丧失ossap5突变.
- 在短日条件下分析了标题日期和关键开花基因 (Hd3a, RFT1) 的表达.
- 进行分子和生化分析以确定蛋白质相互作用和酶活性.
主要成果:
- ossap5突变物在短时间内表现出显著的方向延迟.
- 在ossap5突变体中,Florigen和MADS-box基因表达被下调.
- 发现 OsSAP5 与 OsGF14c 相互作用,并具有 E3 无素结合酶活性,可能会使 OsGF14c 无化.
结论:
- OsSAP5 作为米中标题日期的积极调节剂.
- OsSAP5通过与OsGF14c相互作用和在短日条件下调节下游基因表达来调节标题日期.
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