HDC1 Promotes Primary Root Elongation by Regulating Auxin and K⁺ Homeostasis in Response to Low-K⁺ Stress.

ABSTRACT: Plants frequently encounter relatively low and fluctuating potassium (K⁺) concentrations in soil, with roots serving as primary responders to this stress. Histone modifications, such as de-/acetylation, can function as epigenetic markers of stress-inducible genes. However, the signaling network between histone modifications and low-K⁺ (LK) response pathways remains unclear. This study investigated the regulatory role of Histone Deacetylase Complex 1 (HDC1) in primary root growth of Arabidopsis thaliana under K⁺ deficiency stress. Using a hdc1-2 mutant line, we observed that HDC1 positively regulated root growth under LK conditions. Compared to wild-type (WT) plants, the hdc1-2 mutant exhibited significantly inhibited primary root growth

SUBMITTER: Kuang X 

PROVIDER: S-EPMC11762372 | biostudies-literature | 2025 Jan

REPOSITORIES: biostudies-literature