Distinct guard cell specific remodeling of chromatin accessibility during abscisic acid and CO₂ dependent stomatal regulation.

ABSTRACT: In plants, epidermal guard cells integrate and respond to numerous environmental signals to control stomatal pore apertures thereby regulating gas exchange. Chromatin structure controls transcription factor access to the genome, but whether large-scale chromatin remodeling occurs in guard cells during stomatal movements, and in response to the hormone abscisic acid (ABA) in general, remain unknown. Here we isolate guard cell nuclei from Arabidopsis thaliana plants to examine whether the physiological signals, ABA and CO₂, regulate guard cell chromatin during stomatal movements. Our cell type specific analyses uncover patterns of chromatin accessibility specific to guard cells and define novel cis-regulatory sequences supporting guard cell specific gene expression. We find

SUBMITTER: Seller CA 

PROVIDER: S-EPMC10197618 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature