转录组分析揭示了转录因子WRKY70在早期N-基-皮佩科力酸信号传递中的作用
Jessica Foret1, Jung-Gun Kim1, Elizabeth S Sattely2,3
1Department of Biology, Stanford University, Stanford, CA 94305, USA.
Plant physiology
|October 15, 2024
概括
通过激活WRKY基因,N-Hydroxy-pipecolic acid (NHP) 触发了植物免疫力. 早期的反应依赖于酸 (SA),而后来的防御基因诱导是独立于SA的,突出了WRKY70.
科学领域:
- 植物免疫力 植物免疫力
- 分子植物病原体相互作用
- 植物信号通道的信号通道.
背景情况:
- N-Hydroxy-pipecolic 酸 (NHP) 是一种重要的移动代谢物,用于诱导植物的系统性获得性耐药性 (SAR).
- 确切的早期分子事件和信号通路由NHP启动导致植物免疫,仍然在很大程度上没有特征.
研究的目的:
- 为了阐明早期的转录变化诱导NHP在Arabidopsis.
- 研究酸 (SA) 在NHP介导的早期免疫反应中的作用.
- 确定涉及NHP信号的关键转录因子和途径.
主要方法:
- 用NHP治疗的阿拉比多普西斯的转录组分析 (基因表达概况)
- 对SA-依赖和SA-独立基因表达波的分析.
- 基因淘汰研究 (例如,wrky70突变) 来评估功能角色.
- 对反应性氧物种 (ROS) 生产的测试.
主要成果:
- NHP治疗诱导了不同的基因表达波:早期的WRKY转录因子基因诱导,随后是防御基因激活.
- 最初的NHP诱导的基因表达 (分钟) 很大程度上依赖SA,而后来的反应 (小时) 是独立于SA.
- 由NHP诱导的二次转录反应和SAR保护依赖于WRKY70转录因子.
- WRKY70对于在弗拉盖林治疗后依赖于NHP增强ROS产生至关重要.
结论:
- NHP通过涉及WRKY因子的两波转录级联启动植物免疫力.
- 早期的NHP反应依赖于基底SA水平,而后来的防御激活则独立于新的SA生物合成.
- WRKY70在中介下游依赖NHP的转录事件,SAR和ROS信号传递方面发挥着至关重要的作用.
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