›› 2016, Vol. 43 ›› Issue (4): 1006-1011.doi: 10.16431/j.cnki.1671-7236.2016.04.023

• 生理生化 • 上一篇    下一篇

产纤维素酶地衣芽孢杆菌的诱变选育及其产酶条件优化

余祖华1, 丁轲1,2, 侯奎1, 李元晓2, 李旺2, 刘一尘1, 曹平华2, 贾艳艳1, 程相朝1,2   

  1. 1. 河南科技大学动物疫病与公共卫生重点实验室, 洛阳 471003;
    2. 河南科技大学宏翔生物饲料实验室, 洛阳 471003
  • 收稿日期:2015-10-26 出版日期:2016-04-20 发布日期:2016-04-27
  • 通讯作者: 丁轲 E-mail:keding19@163.com
  • 作者简介:余祖华(1977-),女,河南商城人,博士,讲师,研究方向:动物微生态学和动物免疫学,E-mail:yzhd05@163.com
  • 基金资助:
    河南省科技厅重大科技攻关项目(131100110300);河南省教育厅重点项目(13B230987、14B230002)

Mutation Breeding and Optimization of Enzyme-producing Condition of Bacillus lichenniformis Producing Cellulase

YU Zu-hua1, DING Ke1,2, HOU Kui1, LI Yuan-xiao2, LI Wang2, LIU Yi-chen1, CAO Ping-hua2, JIA Yan-yan1, CHENG Xiang-chao1,2   

  1. 1. Key Laboratory of Animal Disease and Public Health of Henan University of Science and Technology, Luoyang 471003, China;
    2. Hongxiang Biological Feed Laboratory of Henan University of Science and Technology, Luoyang 471003, China
  • Received:2015-10-26 Online:2016-04-20 Published:2016-04-27

摘要: 为提高产纤维素酶地衣芽孢杆菌(Bacillus lincheniformis)的产酶能力,本试验以前期分离的产纤维素酶地衣芽孢杆菌LY02作为出发菌株,通过紫外线对该菌株进行了诱变选育,筛选高产纤维素酶的突变株,并分别对其接种量、培养温度、培养时间、培养基初始pH和金属离子等产酶条件进行了优化。结果显示,经诱变选育后突变菌株的纤维素酶活力较出发菌株提高了34.31%。其最佳产酶培养条件为:接种量1.5%,培养温度37℃,培养时间24 h,培养基初始pH 5.0,K+和Ba2+对纤维素酶的产生有激活作用。本研究为进一步将高产纤维素酶的突变株开发为生产菌株提供了基础条件。

关键词: 地衣芽孢杆菌; 纤维素酶; 诱变; 产酶条件; 酶活力

Abstract: In order to improve the ability of producing cellulase of Bacillus lichenniformis, the mutational strain was screened after Bacillus lichenniformis LY02 was induced by UV.Then the best optimal enzyme-producing condition, inoculum size, temperature, incubation time, initial pH and metal ions were studied.The results showed that the cellulase activity of mutated strain was increased by 34.31%.And the best optimal ferment conditions were as follows:Inoculation concentration was 1.5%, cultivated temperature was 37℃, ferment time was 24 h, initial pH of medium was 5.0, and K+ and Ba2+ could promote the cellulase producing.These results were contributed to develop the strain to be applied in practice.

Key words: Bacillus licheniformis; cellulase; mutation; enzyme-producing condition; enzyme activity

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