The regulatory role of γ-aminobutyric acid in chickpea plants depends on drought tolerance and water scarcity level.

ABSTRACT: γ-Aminobutyric acid (GABA) is a non-protein amino acid with multifunctional roles in dynamic plant responses. To determine the effects of exogenous GABA application (0, 25 and 50 µM) on drought response, two chickpea cultivars with contrasting tolerance to water deficit were examined. Plants were exposed to four irrigation levels (irrigation to 100, 60, 40 and 20% field capacity). Water deficit decreased growth, chlorophyll content, and photosynthetic efficiency. It increased electrolyte leakage and lipid peroxidation owing to both higher ROS accumulation and lower antioxidant enzyme activity. These negative effects of water deficit and the alleviating role of GABA application were more prominent in the sensitive, as compared to the tolerant cultivar. Water deficit also increased proline a

SUBMITTER: Seifikalhor M 

PROVIDER: S-EPMC9054827 | biostudies-literature | 2022 Apr

REPOSITORIES: biostudies-literature