H2S调节BrSDH1-1的替代拼接,以诱导中国白菜的口腔关闭
Jiao Zhang1,2, Liping Zhang1,2, Xiaoli Han1,2
1School of Life Science, Shanxi University, Taiyuan 030031, China.
Horticulture research
|November 5, 2025
概括
硫化 (H2S) 信号调节中国白菜中酸脱酶 (SDH) 的替代拼接,增强干旱耐受性. 这种H2S介导的拼接改善了口腔关闭和细胞能量生产,以提高植物的抗压能力.
科学领域:
- 植物生理学 植物生理学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 硫化 (H2S) 作为气体传递体,对植物口腔关闭和生物能源学至关重要.
- 替代拼接 (AS) 对于植物发育和应激适应至关重要.
- 在干旱耐受性方面,H2S和AS之间的相互作用在很大程度上是未知的,特别是在中国白菜中.
研究的目的:
- 研究H2S信号在调节中华白菜中糖酸脱酶 (SDH) 替代拼接中的作用.
- 阐明H2S通过SDH影响口腔关闭和干旱耐受性的机制.
- 为了确定特定的SDH转录变异参与H2S介导的应激反应.
主要方法:
- 用RNA测序 (RNA-Seq) 来分析BrSDH1-1基因的H2S调节的替代拼接模式.
- 基因沉默 (使用RNA干扰) 和过度表达在中国白菜和菜,以评估基因功能.
- 生物化学试验测量SDH活性,ATP生产和活性氧物种 (ROS) 水平.
- 生物素切换试验检测蛋白质化.
主要成果:
- H2S信号直接影响*BrSDH1-1*基因的替代拼接,产生差异表达的转录变体.
- 特定的变种,BrSDH1-1A和BrSDH1-1C,在*Arabidopsis*中过度表达后,赋予了增强的抗干旱能力.
- H2S处理增强了SDH活性,ATP生产和口腔关闭,同时在过度表达BrSDH1-1A和BrSDH1-1C的植物中降低了ROS.
- 发现H2S诱导BrSDH1-1A和BrSDH1-1C蛋白质的持续硫化,这表明它具有直接的调节作用.
结论:
- H2S调节*BrSDH1-1*的替代拼接,以调节口腔关闭并改善中国白菜的干旱耐受性.
- 转录变异BrSDH1-1A和BrSDH1-1C是H2S诱导干旱弹性的关键媒介.
- 这项研究揭示了一种新的分子机制,它将气体传递器信号,替代拼接和植物的应激耐受性联系在一起,为作物改善提供了潜力.
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