HsfA1a-BAG5b模块通过激活番茄的自性来调节热耐受性
Mingming He1, Jiating Wu1, Yan Yang1,2
1College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China.
Plant physiology
|October 18, 2025
概括
热冲击转录因子 (Hsfs) 通过激活自增强番茄的耐热性. 这涉及HsfA1a促进BAG5b表达并与BAG5b相互作用以促进自,降解受损蛋白质以改善耐热性.
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:
- 热冲击转录因子 (Hsfs) 和B细胞淋巴瘤2 (Bcl-2) 相关的亚桑原体 (BAG) 蛋白质对于植物的热耐受性至关重要.
- 自对于植物的抗压力和维持细胞平衡至关重要.
研究的目的:
- 阐明BAG蛋白调解HSF诱导自的机制,以提高番茄的耐热性.
- 研究HsfA1a和BAG5b在高温压力下调节自的作用.
主要方法:
- 使用分子生物学技术研究了HsfA1a和BAG5b促进体之间的相互作用.
- 对HsfA1a和BAG5b进行了体外和体内相互作用试验.
- 在野生型,过度表达和突变番茄植物 (Solanum lycopersicum L.) 中分析了耐热性,自细胞形成和基因表达.
主要成果:
- HsfA1a直接与BAG5b促进体结合,激活其表达并与BAG5b相互作用.
- HsfA1a-BAG5b复合体增强了BAG5b和自基因ATG10.0的转录.
- BAG5b过度表达改善了热耐受性和自细胞积累,而bag5b突变体表现出过敏和减少了自.
结论:
- HsfA1a促进BAG5b表达和随后的相互作用,导致ATG10激活和在热应激下增强自.
- 这一途径促进了无处不在的蛋白质的降解,最终增加了番茄的耐热性.
- HsfA1a-BAG5b-ATG10轴是植物自介导热耐性的关键调节器.
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