热冲击因子HSFB1协调植物生长和干旱耐受性在阿拉比多普西斯
Lanjie Zheng1,2, Qianlong Zhang1, Chen Wang1
1State Key Laboratory of Wheat and Maize Crop Science, College of Agronomy, Center for Crop Genome Engineering, Henan Agricultural University, Zhengzhou, 450046, China.
The Plant journal : for cell and molecular biology
|February 7, 2025
概括
热冲击转录因子B1 (HSFB1) 对于植物生长和耐旱性至关重要. 在正常情况下,HSFB1抑制了生长,但通过调节热冲击蛋白101 (HSP101) 来提高干旱抵抗力.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 压力生理学 压力生理学
背景情况:
- 植物面临着持续的非生物压力,往往会停止生长以提高耐受性.
- 在生长和承受压力之间的微妙平衡对于植物的生存至关重要.
- 热冲击转录因子 (HSF) 是压力反应的关键调节者.
研究的目的:
- 研究热冲击因子B1 (HSFB1) 在协调植物生长和干旱应激反应中的作用.
- 确定参与应激耐受性的HSFB1的下游目标和交互伙伴.
- 阐明HSFB1调节生长压力对抗性的分子机制.
主要方法:
- 阿拉比多普西斯塔利亚纳遗传分析 (突变和过度表达线).
- 染色体免疫沉降测序 (ChIP-seq) 和RNA测序 (RNA-seq).
- 过时表达试验和蛋白质与蛋白质相互作用研究.
主要成果:
- HSFB1在正常条件下负面调节植物生长,但增强了对干旱的耐受性.
- 功能丧失的hsfb1突变体表现出增长和干旱耐受性降低.
- HSFB1直接准热冲击蛋白101 (HSP101),该蛋白在下游作用,调节干旱耐受性.
- HSFB1与真核转化启动因子eIF3G1相互作用,增强HSFB1在HSP101上的转录活性.
结论:
- HSFB1是一个关键的调节器,平衡植物生长和干旱应激反应.
- HSFB1-HSP101通路对于赋予植物干旱耐受性至关重要.
- HSFB1和eIF3G1之间的相互作用在调节干旱压力反应方面发挥着重要作用.
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