ABA-induced alternative splicing drives transcriptomic reprogramming for drought tolerance in barley.

ABSTRACT:

Background

Abscisic acid (ABA) is a phytohormone that mediates plant responses to drought stress by regulating stomatal conductance, gene expression, and photosynthetic efficiency. Although ABA-induced stress priming has shown the potential to improve drought tolerance, the molecular mechanisms underlying ABA pretreatment effects remain poorly understood. This study aimed to determine how ABA pre-treatment at the booting stage influences physiological and molecular responses to drought at the heading stage in barley.

Results

The ABA-treated plants exhibited earlier stomatal closure, increased expression of ABA-responsive genes (HvNCED1, HvBG8, and HvA22), and maintained higher chlorophyll levels under drought conditions. Photosynthetic parameters, including photosystem II ac

SUBMITTER: Collin A 

PROVIDER: S-EPMC11977895 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature