食品科学 ›› 2012, Vol. 33 ›› Issue (17): 225-228.

• 生物工程 • 上一篇    下一篇

ERh3421菌株的产酶条件优化

田国政1,孙东发2,*,汪兴平1   

  1. 1.湖北民族学院生物科学与技术学院 2.华中农业大学植物科学技术学院
  • 收稿日期:2011-08-08 修回日期:2012-07-16 出版日期:2012-09-15 发布日期:2012-11-09
  • 通讯作者: 田国政 E-mail:tianguozheng@yahoo.com.cn

Optimization of Fermentation Conditions for Enzymes Production by Rhizopus ERh3421

  • Received:2011-08-08 Revised:2012-07-16 Online:2012-09-15 Published:2012-11-09

摘要: 对ERh3421菌株在不同的pH值、培养时间、培养温度、玉米粉质量浓度等条件培养,研究产酶条件对糖化酶、液化酶、蛋白酶活性的影响,并设pH值、培养温度、玉米粉质量浓度3个因素,采用L9(33)正交试验设计,单向分组分析方法进行方差分析。结果表明:最佳组合培养条件为:pH5.2、培养温度30℃、玉米粉质量浓度5g/100mL,液化酶、糖化酶活力分别高达9.43×103U/g和6.83×103U/g。

关键词: ERh3421菌株, 产酶条件, 酶活性, 优化

Abstract: The effects of initial medium pH, culture time and temperature, and corn flour concentration in the medium on the production of saccharification enzyme, liquefaction enzyme and protease by Rhizopus ERh3421 were explored in the present study. To enhance the production of saccharification and liquefaction enzymes, initial medium pH, culture temperature and corn flour concentration in the medium were optimized using an L9 (33) orthogonal array design. The results obtained were analyzed by one-way analysis of variance. The optimal culture conditions for enhanced enzymes production were initial medium pH 5.2, 30 ℃ and 5 g/100 mL of corn flour concentration in the medium. Under these conditions, the activities of saccharification and liquefaction enzymes in fermentation broth were 9.43 × 103 U/g and 6.83 × 103 U/g, respectively.

Key words: Rhizopus ERh3421, conditions for enzymes production, enzyme activity, optimization

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