转录因子CaHDZ15通过激活HEAT SHOCK FACTORA6a,促进胡的基本耐热性
Shaoliang Mou1,2,3, Weihong He1,2,3, Haitao Jiang1,2,3
1College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, PR China.
Plant physiology
|January 25, 2024
概括
高温压力威胁到农作物. 胡的转录因子CaHDZ15通过激活CaHSFA6a基因,在CaHsp70-2和CaGAPC1蛋白的帮助下增强耐热性.
科学领域:
- 植物生物学 植物生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 高温压力 (HTS) 显著影响植物生长和作物产量,全球变暖加剧了这种情况.
- 植物对HTS的反应主要通过转录因子 (TF) 进行转录调节.
- 家庭主体-氨酸拉链 (HD-Zip) TFs在热耐受性中的特定作用在很大程度上仍未被阐明.
研究的目的:
- 为了功能性地描述胡 (Capsicum annuum) HD-Zip I TF,CaHDZ15,并阐明其在基底热耐受性中的作用.
- 研究CaHDZ15在胡植物中赋予热耐性的分子机制.
- 为了确定参与热应激反应的CaHDZ15的潜在相互作用伙伴.
主要方法:
- 在胡植物中病毒诱导的基因沉默 (VIGS),以评估CaHDZ15.的功能丧失影响.
- 在Nicotiana benthamiana中过度表达CaHDZ15,以评估功能获取效应.
- 酵母两杂交试验和共同免疫沉以确定蛋白质与蛋白质之间的相互作用.
- 促进体分析和定量实时PCR以确定基因调节.
主要成果:
- 的CaHDZ15表达受到HTS和酸的上调调,使得具有基底热耐受性.
- CaHDZ15直接准并激活了热冲击因子6a (HSFA6a) 的促进者,而后者反过来激活了CaHSFA2.
- CaHDZ15与热冲击蛋白70-2 (CaHsp70-2) 和糖-3-脱酶1 (CaGAPC1) 相互作用,增强CaHSFA6a转录并保护CaHDZ15免受降解.
结论:
- CaHDZ15在胡基底热耐受性中起着至关重要的积极作用.
- 一个涉及CaHDZ15,CaHsp70-2和CaGAPC1的分子通路调节了CaHSFA6a转录以提高耐热性.
- 这项研究确立了CaHsp70-2,CaGAPC1和CaHDZ15之间在胡热耐受性转录调节中的新型分子联系.
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