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投稿时间:2021-11-26
投稿时间:2021-11-26
中文摘要: 为了发掘特色酸乳中的优质乳酸菌资源,提高菌株的γ-氨基丁酸(γ-aminobutyric acid,GABA)产量,对前期一株分离自传统酸乳中的产GABA戊糖乳植杆菌(Lactiplantibacillus pentosus,L.pentosus)Z6-15,通过单因素试验及响应面设计法优化其GABA发酵工艺。结果表明,菌株的最佳发酵工艺:葡萄糖20 g/L、酵母粉10 g/L、蛋白胨11.5 g/L、乙酸钠 5 g/L、L-谷氨酸钠(sodium hydrogen glutamate,L-MSG)4.5 g/L、K2HPO42 g/L、柠檬酸三铵 2 g/L、MnSO40.05 g/L、MgSO40.2 g/L、吐温-80 0.1%、初始pH值5.5,接种量4%、装添量175 mL,此优化条件下,菌株于37℃、160 r/min发酵培养72 h后,其GABA产量为3.96 g/L,较优化前提高了39.63%。
Abstract:This study aimed to explore the high-quality lactic acid bacteria resources in traditional yoghurt,and improve the GABA production of these strains.The fermentation process of Lactiplantibacillus pentosus Z6-15,a GABA producing lactic acid bacteria isolated from traditional yogurt,was optimized using a single factor experiment and response surface methodology.The results showed that the optimum fermentation conditions were as follows:20 g/L glucose,10 g/L yeast powder,11.5 g/L peptone,5 g/L sodium acetate,4.5 g/L sodium hydrogen glutamate,2 g/L K2HPO4,2 g/L triammonium citrate,0.05 g/L MnSO4,0.2 g/L MgSO4,0.1%Tween-80,an initial pH of 5.5,4% inoculum,and 175 mL dosage.Under the optimal fermentation conditions,the GABA yield was 3.96 g/L after 72 h fermentation at 37℃ and 160 r/min,which was 39.63% higher than pre-optimization.
keywords: yogurt lactic acid bacteria γ-aminobutyric acid(GABA) response surface methodology fermentation optimization
文章编号:202304022 中图分类号: 文献标志码:
基金项目:自治区公益性项目(KY2022034);新疆区域协同创新专项(上海合作组织科技伙伴计划)(2020E01007)
作者 | 单位 |
林杨1,2,李雪1,楚敏1,唐琦勇1,顾美英1,谭慧林1,孙建1*,张志东1,2* | 1.新疆农业科学院微生物应用研究所/新疆特殊环境微生物实验室,新疆 乌鲁木齐 830091;2.新疆农业大学食品科学与药学学院,新疆 乌鲁木齐 830052 |
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