Redox sensor QSOX1 regulates plant immunity by targeting GSNOR to modulate ROS generation.
Mol Plant
; 14(8): 1312-1327, 2021 08 02.
Article
em En
| MEDLINE
| ID: mdl-33962063
ABSTRACT
Reactive oxygen signaling regulates numerous biological processes, including stress responses in plants. Redox sensors transduce reactive oxygen signals into cellular responses. Here, we present biochemical evidence that a plant quiescin sulfhydryl oxidase homolog (QSOX1) is a redox sensor that negatively regulates plant immunity against a bacterial pathogen. The expression level of QSOX1 is inversely correlated with pathogen-induced reactive oxygen species (ROS) accumulation. Interestingly, QSOX1 both senses and regulates ROS levels by interactingn with and mediating redox regulation of S-nitrosoglutathione reductase, which, consistent with previous findings, influences reactive nitrogen-mediated regulation of ROS generation. Collectively, our data indicate that QSOX1 is a redox sensor that negatively regulates plant immunity by linking reactive oxygen and reactive nitrogen signaling to limit ROS production.
Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Oxirredução
/
Espécies Reativas de Oxigênio
/
Aldeído Oxirredutases
/
Oxirredutases atuantes sobre Doadores de Grupo Enxofre
/
Imunidade Vegetal
Idioma:
En
Revista:
Mol Plant
Assunto da revista:
BIOLOGIA MOLECULAR
/
BOTANICA
Ano de publicação:
2021
Tipo de documento:
Article