Phosphorylation of OsTGA5 by casein kinase II compromises its suppression of defense-related gene transcription in rice.

ABSTRACT: Plants manage the high cost of immunity activation by suppressing the expression of defense genes during normal growth and rapidly switching them on upon pathogen invasion. TGAs are key transcription factors controlling the expression of defense genes. However, how TGAs function, especially in monocot plants like rice with continuously high levels of endogenous salicylic acid (SA) remains elusive. In this study, we characterized the role of OsTGA5 as a negative regulator of rice resistance against blast fungus by transcriptionally repressing the expression of various defense-related genes. Moreover, OsTGA5 repressed PTI responses and the accumulation of endogenous SA. Importantly, we showed that the nucleus-localized casein kinase II (CK2) complex interacts with and phosphorylates OsTGA5 o

SUBMITTER: Niu Y 

PROVIDER: S-EPMC9421590 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature