From defense to symbiosis; evolution processes of plant symbiotic receptor

从防御到共生；

• 批准号: 23688007
• 负责人: NAKAGAWA Tomomi
• 金额: $ 16.39万
• 依托单位: Meiji University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23688007/
• 关键词: 共生; 防御応答; 菌根菌; イネ; 植物微生物間相互作用; 分子進化; 共生応答; 受容体; 根粒菌; 防御; 進化; NFR1; CERK1; マメ科植物; 共生; 防御応答; 菌根菌; イネ; 植物微生物間相互作用; 分子進化; 共生応答; 受容体; 根粒菌; 防御; 進化; NFR1; CERK1; マメ科植物

Plant pathogens have been rapidly evolving their strategy for infection and developing many virulence agents for perturbing host immune system. Thus, plants are constantly exposed to threats from pathogenic microbes in nature. On the contrary, subsets of microbes such as arbuscular mycorrhizal (AM) fungi or rhizobial bacteria symbiotically promote the host plant growth. How plants manage the acceptance of beneficial microbes while rejecting pathogens is a crucial question for understanding the plant-microbe interactions. However, this question has been rarely approached and the answer is still missing. Here, we report that a chitin receptor kinase, OsCERK1, engages in both triggering plant immune responses and acceptance of beneficial AM fungi in rice. These findings illuminate the presence of direct connection between plant defense and symbiotic mechanisms for the first time and are expected to be a breakthrough for this field.

植物病原体一直在迅速发展其感染策略，并开发了许多毒力剂来扰动宿主免疫系统。因此，植物在自然界中不断受到致病微生物的威胁。相反，微生物的子集，例如羊膜菌根（AM）真菌或根瘤菌细菌共生促进宿主植物的生长。植物如何在拒绝病原体的同时管理有益微生物的接受是理解植物 - 微生物相互作用的关键问题。但是，这个问题很少解决，答案仍然缺失。在这里，我们报告说，几丁质受体激酶Oscerk1既从触发植物免疫反应又接受大米中有益的AM真菌的接受。这些发现首次阐明了植物防御与共生机制之间直接联系的存在，预计将是该领域的突破。