Arabidopsis Ubiquitin E3 Ligase AtCHYR1 Promotes ROS Production in Plant Responses to Sugar Availability.

ABSTRACT: Glucose functions as both an essential energy source and a critical signaling molecule, playing pivotal roles in regulating plant growth, development, and stress responses. Here, we report that AtCHYR1, a previously characterized RING-type ubiquitin E3 ligase involved in drought tolerance, also participates in glucose signaling. Exposure to high glucose levels significantly inhibits AtCHYR1 expression, particularly in root tips, while low glucose conditions, such as osmotic stress, sugar starvation, and dark conditions, induce its expression. Importantly, analysis of chyr1 mutants and plants overexpressing AtCHYR1 revealed that AtCHYR1 positively regulated the high glucose-mediated inhibition of germination and root growth, as well as starvation-induced g

SUBMITTER: Ding S 

PROVIDER: S-EPMC12430291 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature