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投稿时间:2014-09-18
投稿时间:2014-09-18
中文摘要: 从火龙果果实表面上筛选出一株发酵产 γ-氨基丁酸(GABA)白色菌株,经形态学观察、生理生化试验和 18S rDNA 测序分析,鉴定为假丝酵母菌菌株(Candida.sp),命名为 C2。C2 作为出发菌株,分别采用紫外线(UV)和亚硝基胍(NTG)诱变方法选育高产 γ-氨基丁酸菌株。与出发菌株相比,紫外诱变菌株 γ-氨基丁酸产量增加了 40.25 %,亚硝基胍 诱变菌株 γ-氨基丁酸产量增加了 62.83 %。通过紫外线和亚硝基胍复合诱变,得到正向突变株,其中 Y6 突变株遗传性 状稳定,γ-氨基丁酸产量达 2.561 g/L,产量比诱变前提高了 3.1 倍。
Abstract:White strains producing γ-aminobutyric acid (GABA) were screening from the surface of pitaya fruits. Strains named C2 were identified as Candida.sp by morphological observation,physiological and biochemical characteristics and 18SrDNA sequence analysis.C2 as the starting strain was screened by UV and NTG to get high-yield of γ-aminobutyric acid yeast. Compared with the starting strain,the data showed that the increasing rate of γ-aminobutyric acid production was 40.25 %from a strain by UV mutagenesis and 62.83 % from a strain by NTG mutagenesis.Y6 with stable γ -aminobutyric acid production was obtainded by UV combined with NTG.The γ-aminobutyric acid production from Y6 was 2.561 g/L and increased about 3.1 times than that before mutagenesis.
keywords: γ-aminobutyric acid Candida.sp UV NTG composite mutagenesis
文章编号:201602045 中图分类号: 文献标志码:A
基金项目:
作者 | 单位 |
郑鸿雁1,赵炜彤1,昌妍希2,邙巍3 | 1. 吉林农业大学 食品科学与工程学院,吉林 长春 130118;2. 内蒙古医科大学 药学院, 内蒙古 呼和浩特 010100;3. 吉林省德惠市朱城子镇人民政府,吉林 德惠 130300 |
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