通过激活CPPYL2-介导的PYL-PP2C-SnRK2通路,CPWRKY51增强了Cucurbita pepo的干旱和盐耐受性
1College of horticulture and plant protection, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia, China.
Journal of plant physiology
|November 15, 2025
概括
CpWRKY51通过增强抗氧化防御和调节关键信号通路来增强植物对盐和干旱压力的抵抗力. 这种转录因子为改善作物抗压能力提供了一个有希望的目标.
科学领域:
- 植物分子生物学 植物分子生物学
- 压力生理学 压力生理学
- 农作物遗传学 农作物遗传学
背景情况:
- WRKY转录因子在植物应激反应中起着至关重要的作用.
- 了解像CpWRKY51这样的特定WRKY基因对于改善作物对非生物压力的耐受性至关重要,例如盐度和干旱.
研究的目的:
- 描述来自Cucurbita pepo的CpWRKY51在应对盐和干旱压力的功能.
- 阐明CpWRKY51介导的压力耐受性背后的分子机制.
主要方法:
- 在Cucurbita pepo和Arabidopsis thaliana中病毒介导的短暂过度表达.
- 生理分析测量反应性氧物种 (ROS) 积累和抗氧化酶活性 (SOD,CAT,POD).
- 分子技术包括DNA亲和力净化测序 (DAP-seq),电泳运动转移试验 (EMSA),酵母一混合 (Y1H),酵母两混合 (Y2H) 和双分子光补充 (BiFC) 试验.
主要成果:
- 过度表达CpWRKY51显著提高了C. pepo和Arabidopsis.的盐和干旱压力的耐受性.
- 过度表达CpWRKY51的线路显示ROS积累减少 (MDA,O2-,H2O2) 和增加抗氧化酶活动.
- CpWRKY51与W盒动图结合,并与PYL-PP2C-SnRK2通路组件相互作用,包括PYL2,PP2C1,PP2C4和CpSnRK2.6.6.
结论:
- 在C. pepo. 中,CpWRKY51积极调节盐和干旱压力耐受性.
- 该机制涉及调节抗氧化剂防御系统和ABA信号通路 (PYL-PP2C-SnRK2).
- CpWRKY51是园艺作物的抗压力基因改进的潜在目标.
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