Ca²⁺ and aminoguanidine on γ-aminobutyric acid accumulation in germinating soybean under hypoxia-NaCl stress.

ABSTRACT: Gamma-aminobutyric acid (GABA), a nonproteinous amino acid with some benefits on human health, is synthesized by GABA-shunt and the polyamine degradation pathway in plants. The regulation of Ca²⁺ and aminoguanidine on GABA accumulation in germinating soybean (Glycine max L.) under hypoxia-NaCl stress was investigated in this study. Exogenous Ca²⁺ increased GABA content significantly by enhancing glutamate decarboxylase gene expression and its activity. Addition of ethylene glycol tetra-acetic acid into the culture solution reduced GABA content greatly due to the inhibition of glutamate decarboxylase activity. Aminoguanidine reduced over 85% of diamine oxidase activity, and 33.28% and 36.35% of GABA content in cotyledon and embryo, respectively. Under hypoxia-NaCl stre

SUBMITTER: Yang R 

PROVIDER: S-EPMC9351771 | biostudies-literature | 2015 Jun

REPOSITORIES: biostudies-literature