Effect of Different Stress Treatment on Enrichment of γ-Aminobutyric Acid in Germination Naked Oat
Five stress treatments(ultrasonic,freezing,water immersion,vacuum and UV)were used to cooperate with naked oat germination to explore the effect of stress treatment on GABA enrichment in naked oat germination.The results showed that the GABA content of naked oat could be significantly increased by ultrasonic,freezing,water immersion,vacuum and ultraviolet irradiation,and the protein and fat content of naked oat had no change.The GABA content of naked oat grains was significantly higher than that of control group after 10-30 min ultrasonic treatment.The highest GABA content in the samples was found at 1 h at the freezing group.In the water immersion,vacuum and ultraviolet groups,GABA enrichment showed a trend of first increase and then decrease,and the appropriate treatment time was 1-2 h.Compared with the water immersion and vacuum treatment,the low oxygen environment was more suitable for GABA enrichment in naked oat germination than the anoxic environment.
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