Effects of Exogenous Sugar Treatment on Enrichment of γ-Aminobutyric Acid in Peanut Sprouts

In order to explore the influence of sugar treatment on the enrichment of γ-aminobutyric acid (GABA) in peanut sprouts, this paper selected the optimal application concentration of different types of exogenous sugars (mannose, sucrose and glucose). The effects of GABA on the germination of peanut seeds and the related substances of GABA anabolic metabolism were investigated and the possible mechanism of action was studied. The results showed that mannose, sucrose and glucose treatment could significantly (P<0.05) increase the content of GABA in peanut sprouts, and the activity of glutamate decarboxylase (GAD), diamine oxidase (DAO), polyamine oxidase (PAO) and the contents of glutamic acid, putrescine, spermidine and spermidine were significantly changed in oxidase (P<0.05). At the same time, according to the test results, different exogenous sugar treatments could increase the contents of ascorbic acid, protein and resveratrol in peanut sprouts to different degrees. GABA in peanut sprouts can be enriched by exogenous sugar treatment, and its influence mechanism may be GABA branch and polyamine degradation pathway.