以早籼稻品种“早944”为对象,测定储藏0～27个月期间,其糙米发芽率、发芽72 h时谷氨酸脱羧酶活力及γ-氨基丁酸的变化,以研究原料储藏期对发芽糙米富集γ-氨基丁酸的影响.结果表明,随着储藏期的延长,发芽率、谷氨酸脱羧酶活力及γ-氨基丁酸含量下降显著(P＜0.05),且下降速率加快.糙米发芽率月平均下降速率为2.03％,谷氨酸脱羧酶月平均失活速率为0.09 U/100 g,γ-氨基丁酸含量月平均下降速率为1.10 mg/100 g.经相关性分析,发芽糙米中谷氨酸脱羧酶活力与γ-氨基丁酸含量呈极显著正相关(r =0.969 5,P＜0.01).%According to study for the effects of raw material's storage period on enrichment of γ - aminobutyric acid in germinated brown rice,the germination rate,activity of glutamate decarboxylase and content of-γ-aminobutyric acid after germinated 72 h were regularly measured from 0 to 27 months during storage of'Z 944"early indica rice type. Results showed that the germination rate, activity of glutamate decarboxylase and "γ- aminobutyric acid content decreased significantly (P <0. 05) with the extension of storage time,and the speed was improved. The germinated brown rice was made by stored"Z 944"early indica rice,whose germination rate,activity of glutamate decarboxylase, and content of y - aminobutyric acid respectively dropped at an average rate of 2. 03% ,0. 09 U/100 g and 1. 10 mg/100 g per month. By correlation analysis,in germinated brown rice, the activity of glutamate decarboxylase and content of γ- aminobutyric acid were significantly positively correlated ( r =0.969 5 ,P <0.01).
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