食品科学 ›› 2012, Vol. 33 ›› Issue (1): 226-229.

• 生物工程 • 上一篇    下一篇

产单宁酶菌株的筛选及选育

陶素芬1,赵祥颖2,刘建军1,2,*   

  1. 1.山东轻工业学院食品与生物工程学院 2.山东省食品发酵工程重点实验室
  • 收稿日期:2011-01-27 修回日期:2012-01-11 出版日期:2012-01-15 发布日期:2012-01-12
  • 通讯作者: 刘建军 E-mail:liujj-2000@163.com

Breeding and Screening of a High-Yield Tannase-Producing Strain

  • Received:2011-01-27 Revised:2012-01-11 Online:2012-01-15 Published:2012-01-12

摘要: 为得到高产单宁酶的菌株,从多年种植的茶园、柿子园以及掩埋柿子、五倍子和茶叶的花园土壤中通过平板初筛和三角瓶固体发酵复筛筛选到一株产单宁酶的曲霉菌株DNM1-39,固体培养其产单宁酶活力为1.58U/g。以DNM1-39为出发菌株,经紫外线照射、硫酸二乙酯单独处理和紫外线照射-硫酸二乙酯复合诱变处理,获得突变株UD-6,其产酶活力达2.80U/g。连续传代实验结果表明,该菌株产酶活力不变,性能稳定。

关键词: 单宁酶, 单宁, 没食子酸, 筛选, 诱变

Abstract: Tannase plays an important role in the food and fine chemical industries. The breeding and screening of a strain with high tannase activity are desired. A tannase-producing strain, DNM1-39, was isolated from resources rich in tannin. The activity of tannase in solid state medium after fermentation by the strain was 1.58 U/g. The strain was identified as Aspergillus through morphologic observation. A mutant strain named as UD-6 was obtained from DNM1-39 mutagenization with ultraviolet irradiation alone, DES treatment alone and both of them. The tannase activity produced by UD-6 was 2.80 U/g. The tannase-producing ability of UD-6 remained the same after continuous passages and displayed excellent genetic stability.

Key words: tannase, tannin, gallic acid, screening, mutagenesis

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