Phytosulfokine downregulates defense-related WRKY transcription factors and attenuates pathogen-associated molecular pattern-triggered immunity.

ABSTRACT: Phytosulfokine (PSK) is a plant growth-promoting peptide hormone that is perceived by its cell surface receptors PSKR1 and PSKR2 in Arabidopsis. Plants lacking the PSK receptors show phenotypes consistent with PSK signaling repressing some plant defenses. To gain further insight into the PSK signaling mechanism, comprehensive transcriptional profiling of Arabidopsis treated with PSK was performed, and the effects of PSK treatment on plant defense readouts were monitored. Our study indicates that PSK's major effect is to downregulate defense-related genes; it has a more modest effect on the induction of growth-related genes. WRKY transcription factors (TFs) emerged as key regulators of PSK-responsive genes, sharing commonality with a pathogen-associated molecular pattern (PAMP) responses, f

SUBMITTER: Liu D 

PROVIDER: S-EPMC11658183 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature