Red light induces salicylic acid accumulation by activating CaHY5 to enhance pepper resistance against Phytophthora capsici.

ABSTRACT: Pepper (Capsicum annuum L.) is frequently challenged by various pathogens, among which Phytophthora capsici is the most devastating to pepper production. Red light signal acts as a positive induction of plant resistance against multiple pathogens. However, little is known about how the red light signal affects pepper resistance to P. capsici infection (PCI). Here, we report that red light regulates salicylic acid (SA) accumulation by activating elongated hypocotyl5 (CaHY5), a basic leucine zipper (bZIP) transcription factor, thereby decreasing pepper susceptibility to PCI. Exogenous SA treatment reduced pepper susceptibility to PCI, while silencing of CaPHYB (a red light photoreceptor) increased its susceptibility. PCI significantly induced CaHY5 expressi

SUBMITTER: Yang Y 

PROVIDER: S-EPMC10689078 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature