He Jiaxin, Li Rui, Xu Chan, Chen Xiaoyan, Yao Juanni, Li Zhengguo, Cheng Yulin
Key Laboratory of Plant Hormones and Molecular Breeding of Chongqing, School of Life Sciences, Chongqing University, Chongqing 401331, China.
J Agric Food Chem. 2025 Jan 8;73(1):135-146. doi: 10.1021/acs.jafc.4c07212. Epub 2024 Dec 24.
Fruit is an essential part of the human diet, and postharvest fungal diseases are the major cause of fruit postharvest losses worldwide. Pathogen-associated molecular patterns (PAMPs) are important elicitors from microbes, and the recognition between microbial PAMPs and plant receptors leads to PAMP-triggered immunity. Here, we identified a PAMP, PdEIX, that is an important protein elicitor with plant immunity-inducing activity, from the citrus green mold pathogen . PdEIX showed an apoplastic location similar to that of known PAMPs, and plant receptor-like protein NbEIX2, receptor-like kinase BAK1, and other signaling components of plant immunity were required for PdEIX-triggered plant cell death in the model plant . Moreover, PdEIX triggered a series of immune responses in citrus fruit and enhanced the resistance of citrus and other fruit against fungal pathogens. Our results indicate that application of a microbial PAMP as the plant immunity inducer is an effective strategy for controlling postharvest fungal diseases of fruit.
水果是人类饮食的重要组成部分，采后真菌病害是全球水果采后损失的主要原因。病原体相关分子模式（PAMPs）是微生物的重要激发子，微生物PAMPs与植物受体之间的识别会引发PAMP触发的免疫反应。在此，我们从柑橘绿霉病原体中鉴定出一种PAMP，即PdEIX，它是一种具有植物免疫诱导活性的重要蛋白激发子。PdEIX显示出与已知PAMPs相似的质外体定位，在模式植物中，PdEIX触发的植物细胞死亡需要植物类受体蛋白NbEIX2、类受体激酶BAK1以及植物免疫的其他信号成分。此外，PdEIX在柑橘果实中引发了一系列免疫反应，并增强了柑橘和其他水果对真菌病原体的抗性。我们的结果表明，应用微生物PAMP作为植物免疫诱导剂是控制水果采后真菌病害的有效策略。
