Exogenous GABA enhances muskmelon tolerance to salinity-alkalinity stress by regulating redox balance and chlorophyll biosynthesis.

ABSTRACT:

Background

Salinity-alkalinity stress is one of the major abiotic stresses affecting plant growth and development. γ-Aminobutyrate (GABA) is a non-protein amino acid that functions in stress tolerance. However, the interactions between cellular redox signaling and chlorophyll (Chl) metabolism involved in GABA-induced salinity-alkalinity stress tolerance in plants remains largely unknown. Here, we investigated the role of GABA in perceiving and regulating chlorophyll biosynthesis and oxidative stress induced by salinity-alkalinity stress in muskmelon leaves. We also evaluated the effects of hydrogen peroxide (H₂O₂), glutathione (GSH), and ascorbate (AsA) on GABA-induced salinity-alkalinity stress tolerance.

Results

Salinity-alkalinity stress increased ma

SUBMITTER: Jin X 

PROVIDER: S-EPMC6359809 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature