Ca2+ sensor-mediated ROS scavenging suppresses rice immunity and is exploited by a fungal effector.
Cell
; 184(21): 5391-5404.e17, 2021 10 14.
Article
em En
| MEDLINE
| ID: mdl-34597584
ABSTRACT
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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Plantas
/
Oryza
/
Proteínas Fúngicas
/
Cálcio
/
Sequestradores de Radicais Livres
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Espécies Reativas de Oxigênio
/
Imunidade Vegetal
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Cell
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
China