Ca2+ sensor-mediated ROS scavenging suppresses rice immunity and is exploited by a fungal effector

Gao Mingjun, He Yang, Yin Xin, Zhong Xiangbin, Yan Bingxiao, Wu Yue, Chen Jin, Li Xiaoyuan, Zhai Keran, Huang Yifeng, Gong Xiangyu, Chang Huizhong, Xie Shenghan, Liu Jiyun, Yue Jiaxing, Xu Jianlong, Zhang Guiquan, Deng Yiwen, Wang Ertao, Tharreau Didier, Wang Guo-Liang, Yang Weibing, He Zuhua. 2021. Ca2+ sensor-mediated ROS scavenging suppresses rice immunity and is exploited by a fungal effector. Cell, 184 (21):e17 : 5392-5404.

https://doi.org/10.1016/j.cell.2021.09.009

Article de revue ; Article de recherche ; Article de revue à facteur d'impact

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Url - jeu de données - Entrepôt autre : https://antibodyregistry.org/search.php?q=AB_11211891

Quartile : Outlier, Sujet : BIOCHEMISTRY & MOLECULAR BIOLOGY / Quartile : Outlier, Sujet : CELL BIOLOGY

Résumé : Plant immunity is activated upon pathogen perception and often affects growth and yield when it is constitutively active. How plants fine-tune immune homeostasis in their natural habitats remains elusive. Here, we discover a conserved immune suppression network in cereals that orchestrates immune homeostasis, centering on a Ca2+-sensor, RESISTANCE OF RICE TO DISEASES1 (ROD1). ROD1 promotes reactive oxygen species (ROS) scavenging by stimulating catalase activity, and its protein stability is regulated by ubiquitination. ROD1 disruption confers resistance to multiple pathogens, whereas a natural ROD1 allele prevalent in indica rice with agroecology-specific distribution enhances resistance without yield penalty. The fungal effector AvrPiz-t structurally mimics ROD1 and activates the same ROS-scavenging cascade to suppress host immunity and promote virulence. We thus reveal a molecular framework adopted by both host and pathogen that integrates Ca2+ sensing and ROS homeostasis to suppress plant immunity, suggesting a principle for breeding disease-resistant, high-yield crops.

Mots-clés Agrovoc : résistance aux maladies, immunité, maladie des plantes, dérivé réactif de l'oxygène, homéostasie, Oryza sativa, effecteur moléculaire, catalase, physiologie végétale, pyriculariose du riz, Xanthomonas oryzae, Rhizoctonia solani