中国畜牧兽医

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牛粪中纤维素分解菌的分离鉴定及其产酶条件优化研究

高云航1,张喜宏1,王巍1,王艳秋2,马红霞1,娄玉杰1   

  1. 1.吉林农业大学动物科技学院,吉林长春 130118;2.吉林省长春净月高新技术开发区永兴街道办事处,吉林长春 130118)
  • 收稿日期:2013-08-26 出版日期:2014-03-20 发布日期:2014-05-15
  • 通讯作者: 马红霞。E-mail:hongxia0731001@163.cn
  • 作者简介:高云航(1975—),男,吉林人,博士,副教授,研究方向:功能性微生物开发与利用。
  • 基金资助:

    国家现代农业产业技术体系建设专项(CARS-38);农业部公益性行业(农业)科研专项(201303091);吉林省科技发展计划项目(201205058);吉林省教育厅科学技术研究项目(201358)。

Study on Isolation,Identification and Enzyme-producing Conditions Optimized of Cellulolytic Bacteria in Ox Dung

GAO Yun-hang1,ZHANG Xi-hong1,WANG Wei1,WANG Yan-qiu2,MA Hong-xia1,LOU Yu-jie1   

  1. 1.College of Animal Science and Technology,Jilin Agricultural University,Changchun 130118,China;2.Sub-district Office of Changchun Jingyue National High-technology Industrial Development Zone,Changchun 130118,China)
  • Received:2013-08-26 Online:2014-03-20 Published:2014-05-15

摘要: 本试验通过对牛粪进行富集培养、分离纯化,利用刚果红染色法和摇瓶复筛得到1株产酶活较高的纤维素分解菌N12,经形态观察、生化鉴定和16S rRNA遗传学鉴定为芽孢杆菌属的短小芽孢杆菌(Bacillus pumilus),并对其产酶条件进行了初步优化。结果表明,菌株N12以0.5%玉米粉为碳源、1%酵母粉为氮源、初始pH 3.0、42 ℃摇瓶培养54 h产酶活最高。

关键词: 牛粪; 纤维素分解菌; 鉴定; 条件优化

Abstract: :A strain of highly cellulolytic decomposing bacteria was obtained by the congo red flat plate straining and shake flasking method screened from the ox dung which named N12. It had been identified as Bacillus which belonged to Bacillus pumilus sp. by morphologic characteristics observation,physiology and biochemical experiment and also 16S rRNA genetic analyze.The conditions of producing cellulase on strain N12 were also been studied in this test.When the contents of carbon and nitrogen sources were 0.5% maizena and 1% yeast powder,and also the nitial pH was 3.0,the fermentation temperature was 42 ℃,at the same time the fermentation time was 54 h,it had the highest enzyme activity.

Key words: ox dung; cellulose decomposing bacteria; identification; conditions optimize