食品科学 ›› 2011, Vol. 32 ›› Issue (11): 243-247.doi: 10.7506/spkx1002-6630-201111050

• 生物工程 • 上一篇    下一篇

He-Ne激光和NTG复合诱变米曲霉提高其蛋白酶和淀粉酶酶活力

葛菁萍,陈方博,王海曼,柴洋洋,平文祥*   

  1. 微生物黑龙江省高校重点实验室,黑龙江大学生命科学学院
  • 出版日期:2011-06-15 发布日期:2011-05-13

Enhancing Effect of Mutagenesis with He-Ne Laser Followed by NTG on Protease and Amylase Activities in Aspergillus oryzae

GE Jing-ping,CHEN Fang-bo,WANG Hai-man,CHAI Yang-yang,PING Wen-xiang*   

  1. Key Laboratory of Microbiology of Heilongjiang Province, College of Life Science, Heilongjiang University, Harbin 150080, China
  • Online:2011-06-15 Published:2011-05-13

摘要: 以分离自豆酱中的米曲霉(Aspergillus oryzae)HDF-C14为出发菌株,采用He-Ne激光和亚硝基胍复合诱变的方法获得高产蛋白酶和淀粉酶的突变株HDF-C14-HN5,并将其应用到豆酱发酵中,测定酱曲发酵时蛋白酶和淀粉酶的酶活力。所得成曲中干基蛋白酶酶活力最高可达1572.64U/g,淀粉酶酶活力最高可达2815.23U/g。此生产性发酵实验可以为该菌株投入工业化生产提供技术支撑。

关键词: 米曲霉, 酱曲, 复合诱变, 蛋白酶酶活力, 淀粉酶酶活力

Abstract: A protease- and amylase-producing strain named Aspergillus oryzae HDF-C14 was isolated from soybean paste and mutagenized with He-Ne laser combined with NTG. A mutant HDF-C14-HN5 was obtained and applied to the fermentation of soybean paste. The protease activity in the obtained sauce koji reached up to 1572.64 U/g and the amylase activity reached up to 2815.23 U/g. Thus, this strain can be used industrially.

Key words: Aspergillus oryzae, compound mutation, sauce koji, protease, amylase

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