Molecular Crosstalk Between PAMP-Triggered Immunity and Photosynthesis
Molecular Crosstalk Between PAMP-Triggered Immunity and Photosynthesis
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DOI：
10.1094/mpmi-11-11-0301
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发表时间：
2012-08-01
影响因子：
3.5
通讯作者：
Weber, Andreas P. M.
中科院分区：
文献类型：
--
作者：
Goehre, Vera;Jones, Alexandra M. E.;Weber, Andreas P. M.
先天免疫系统允许植物以适当的方式对潜在的病原体做出反应，同时最大限度地减少损害和能源成本。光合作用提供了持续的能量供应，因此必须整合到防御病原体中。虽然在感染过程中的光合活性的变化已被描述，一个详细的和结论性的表征是缺乏的。在这里，我们讨论了病原体相关分子模式（PAMPs）是否激活早期防御反应引发光合作用的变化。使用蛋白质组学和叶绿素荧光测量，我们表明，激活防御PAMPs导致非光化学淬灭（NPQ）的快速下降。相反，NPQ也影响PAMP触发免疫的几种反应。在NPQ受损的突变体中，质外体活性氧的产生增强，防御基因的表达受到不同的影响。虽然早期防御标记物WRKY22和WRKY29的诱导增强，但晚期标记物PR 1和PR 5的诱导完全消失。我们建议，NPQ的调节是植物防御计划的内在组成部分。
The innate immune system allows plants to respond to potential pathogens in an appropriate manner while minimizing damage and energy costs. Photosynthesis provides a sustained energy supply and, therefore, has to be integrated into the defense against pathogens. Although changes in photosynthetic activity during infection have been described, a detailed and conclusive characterization is lacking. Here, we addressed whether activation of early defense responses by pathogen-associated molecular patterns (PAMPs) triggers changes in photosynthesis. Using proteomics and chlorophyll fluorescence measurements, we show that activation of defense by PAMPs leads to a rapid decrease in nonphotochemical quenching (NPQ). Conversely, NPQ also influences several responses of PAMP-triggered immunity. In a mutant impaired in NPQ, apoplastic reactive oxygen species production is enhanced and defense gene expression is differentially affected. Although induction of the early defense markers WRKY22 and WRKY29 is enhanced, induction of the late markers PR1 and PR5 is completely abolished. We propose that regulation of NPQ is an intrinsic component of the plant's defense program.