Effects of components in culture medium on glutamate decarboxylase activity and gamma-aminobutyric acid accumulation in foxtail millet (Setaria italica L.) during germination
文献类型: 外文期刊
第一作者: Bai, Qingyun
作者: Bai, Qingyun;Gu, Zhenxin;Cao, Xiaohong;Li, Yan;Liu, Kunlun;Bai, Qingyun;Chai, Meiqing
作者机构:
关键词: Foxtail millet;Germination;GABA;GAD;Culture medium;Optimisation
期刊名称:FOOD CHEMISTRY ( 影响因子:7.514; 五年影响因子:7.516 )
ISSN: 0308-8146
年卷期: 2009 年 116 卷 1 期
页码:
收录情况: SCI
摘要: The effects of glutamic acid (Glu), pyridoxal-5-phosphate (PLP) and calcium chloride (CaCl(2)) in culture medium on glutamate decarboxylase (GAD) activity and gamma-aminobutyric acid (GABA) accumulation in foxtail millet (Setaria italica L.) during germination were investigated in this study. The components in Culture medium for GABA accumulation were optimised using response Surface methodology (RSM). Results showed that GAD activity and GABA yield were dependent on the addition of Glu, PLP and CaCl(2) into the culture medium. Box-Behnken design indicated that the optimal culture components for GABA accumulation were: Glu at a concentration of 1.2 mg/ml, PLP at a concentration of 50 mu M and CaCl(2) at a concentration of 2.5 mM. Under the optimal conditions, the maximal production of GABA (42.9 mg/100 g FW) was obtained. Analysis of variance for the regression model suggested that the model can quite exactly predict GABA accumulation in millet during germination. (C) 2009 Elsevier Ltd. All rights reserved.
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