GhAOS integrates circadian rhythm and jasmonic acid signaling to regulate high temperature stress responses in cotton and Arabidopsis.

ABSTRACT:

Background

Cotton (Gossypium spp.) cultivation is significantly challenged by high temperatures (HT), especially during reproductive stages, leading to male abortion and yield losses.

Results

This study investigated the complex interplay between circadian rhythm (CR), HT, and jasmonic acid (JA) signaling in cotton and Arabidopsis. Disruption of CR led to reduced JA content, triggering bud yellowing and abscission at the tetrad stage (TS) in the HT-sensitive cotton line H05 and longer stigma in Arabidopsis. To elucidate the role of JA under continuous light (CL), targeting the JA biosynthesis gene GhAOS in cotton and using Arabidopsis mutants aos and aoc2 revealed accelerated drying, decreased JA content, and male sterility, alongside altered expression patterns of pivotal bi

SUBMITTER: Khan AH 

PROVIDER: S-EPMC12506428 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature