发芽成熟增强了FLS2介导的抵抗力Pseudomonas syringae
Lanxi Hu1, Brian Kvitko1, Paul M Severns1
1Department of Plant Pathology, University of Georgia, Athens, GA 30602, U.S.A.
Molecular plant-microbe interactions : MPMI
|August 28, 2023
概括
植物免疫组件需要精确的时间来防御. 这项研究揭示了在植物衰老过程中调节Flagellin-Sensing 2 (FLS2) 受体介导的耐药性的内在机制,独立于microRNA156.
科学领域:
- 植物免疫力 植物免疫力
- 分子生物学分子生物学
- 植物开发 植物开发
背景情况:
- 免疫的时空调节对于植物防御至关重要.
- 鞭毛蛋白感应2 (FLS2) 是细菌鞭毛蛋白识别的关键受体.
- 在幼苗植物阶段,FLS2免疫功能降低,但机制尚不清楚.
研究的目的:
- 研究FLS2介导植物免疫的年龄相关调节.
- 确定microRNA156在幼叶免疫力中的作用.
- 在老化过程中阐明控制FLS2信号幅度的内在机制.
主要方法:
- 在青少年和成年人免疫反应的比较分析 叶子对*Pseudomonas syringae* pv. *西红* DC3000.这是一个很好的选择.
- 测量flg22诱导的标记基因表达和反应性氧物种 (ROS) 生产.
- 评估焦糖沉积的情况.
- 对*FLS2*和*FRK1*表达与微RNA156.6相关的分析.
主要成果:
- 青春期叶子对*P. syringae*的基础免疫力降低是FLS2独立的.
- 在青春期和成年叶子中,FLS2介导的反应 (基因表达,ROS) 是可比的.
- 与幼叶相比,成年叶子中的胆沉积明显高.
- 微RNA156不会影响*FLS2*或*FRK1*的表达,但会轻微抑制幼叶中的质沉积.
结论:
- 一个内在的机制,而不是microRNA156,在植物老化过程中调节FLS2介导的抵抗幅度.
- 年轻的叶子表现出不同的防御策略,可能涉及特定年龄的质沉积.
- 了解依赖年龄的免疫力对于增强植物抗病能力至关重要.
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