Phosphorylation-guarded light-harvesting complex II contributes to broad-spectrum blast resistance in rice
Phosphorylation-guarded light-harvesting complex II contributes to broad-spectrum blast resistance in rice
复制标题
磷酸化保护的光捕获复合物 II 有助于水稻广谱抗稻瘟病
DOI：
10.1073/pnas.1905123116
复制
发表时间：
2019-08-27
影响因子：
11.1
通讯作者：
Zhang, Zhengguang
中科院分区：
文献类型：
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作者：
Liu, Muxing;Zhang, Suobing;Zhang, Zhengguang
环境条件是植物病害发生发展的关键因素。光照影响植物病害的发生，但其潜在的分子机制尚不清楚。在这里，我们报道了水稻的光收集复合体II蛋白LHCB5在稻瘟病菌侵染期间受到光诱导磷酸化。我们证明LHCB5启动子中的单核苷酸多态性（SNPs）控制LHCB5的表达，这反过来又与LHCB5的磷酸化相关。LHCB5磷酸化通过在叶绿体中积累活性氧物质（reactive oxidation species， ROS）来增强水稻对M. oryzae的广谱抗性。我们还发现LHCB5磷酸化诱导的抗性是可遗传的。我们的研究结果揭示了一种由光收集复合物II磷酸化介导的免疫机制。
Environmental conditions are key factors in the progression of plant disease epidemics. Light affects the outbreak of plant diseases, but the underlying molecular mechanisms are not well understood. Here, we report that the light-harvesting complex II protein, LHCB5, from rice is subject to light-induced phosphorylation during infection by the rice blast fungus Magnaporthe oryzae. We demonstrate that single-nucleotide polymorphisms (SNPs) in the LHCB5 promoter control the expression of LHCB5, which in turn correlates with the phosphorylation of LHCB5. LHCB5 phosphorylation enhances broadspectrum resistance of rice to M. oryzae through the accumulation of reactive oxidative species (ROS) in the chloroplast. We also show that LHCB5 phosphorylation-induced resistance is inheritable. Our results uncover an immunity mechanism mediated by phosphorylation of light-harvesting complex II.