HSFA2-HSFB2a-WRKY10转录级联调解葡萄生殖质中的热耐受性
Shenchang Li1,2,3, Ling Yuan4, Haibo Yu1,2,3
1State Key Laboratory of Plant Diversity and Specialty Crops, and Beijing Key Laboratory of Grape Sciences and Enology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
Plant physiology
|December 16, 2025
概括
热冲击转录因子A2 (HSFA2) 激活HSFB2a,从而抑制WRKY10. 这种级联调节葡萄树的热应激耐受性,为繁殖弹性品种提供了目标.
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:
- 葡萄树面临着气候变化引起的热应激.
- 野生葡萄树的耐热性高于种植的葡萄树.
- 之前的研究发现,V. davidii HSFA2比V. vinifera HSFA2具有更高的耐热性.
研究的目的:
- 阐明HSFA2调节葡萄树的耐热性的精确机制.
- 调查HSFB2a作为HSFA2下游目标的作用.
- 确定用于育种耐热葡萄品种的分子标.
主要方法:
- DAP-seq,酵母一混合,和电泳运动转移测试.
- 在葡萄藤植物和悬浮细胞中进行功能性测试.
- 发起人活动分析.
主要成果:
- HSFA2直接激活了HSFB2a,它可以抑制WRKY10.
- HSFB2a结合了WRKY10促进子,而WRKY10抑制了APX3和HSP18.1.1.
- HSFA2,HSFB2a和WRKY10没有物理相互作用.
- V. davidii 的 HSFB2a 促销剂比 V. vinifera 的 HSFB2a 促销剂更活跃.
结论:
- 一个新的HSFA2-HSFB2a-WRKY10转录级联调节葡萄藤热应激反应.
- HSFB2a增强了耐热性,而WRKY10则降低了它.
- 在HSFB2a促进剂活性中的差异可能解释物种层面的热耐受性变化.
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