Exocyst subunits EXO70B1 and B2 contribute to stomatal dynamics and cell wall modifications.

ABSTRACT:

Introduction

Based on previous reports of defense-related defects in the Arabidopsis loss-of-function (LOF) mutants of the EXO70B1 and EXO70B2 exocyst subunits, we investigated the underlying causes of these phenotypes.

Methods

We analyzed stomatal aperture states in both young and adult plants. As the exocyst is involved in the secretion to the cell wall, we examined cell wall composition, and we correlated these findings via a comprehensive mRNA expression analysis.

Results

Our results revealed and discovered a more closed initial state of stomatal opening in exo70B mutants, as well as altered methylation and acetylation modifications of pectin and hemicellulose in the studied mutant lines. These changes in cell wall modifications may contribute to bot

SUBMITTER: Drs M 

PROVIDER: S-EPMC12753983 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature