生物技术通报 ›› 2013, Vol. 0 ›› Issue (4): 101-109.

• 研究报告 • 上一篇    下一篇

复合木质纤维素酶菌株筛选及其培养条件优化

于俊杰1,2, 赫荣琳2, 武改红2, 张粲1,2, 陈树林2, 张同存1   

  1. 1. 天津科技大学生物工程学院,天津 300457 ;2. 天津工业生物技术研究所 天津市工业生物系统与 过程工程重点实验室,天津 300308
  • 收稿日期:2012-10-24 修回日期:2013-04-22 出版日期:2013-04-22 发布日期:2013-04-22
  • 作者简介:于俊杰,女,硕士研究生,研究方向:发酵工程;E-mail:yjj5127@163.com
  • 基金资助:
    国家“863”计划项目(2012AA101807,2012AA023202)

Isolation of Strain Producing Complex Lignocellulase and the Optimization of Culture Conditions

Yu Junjie1,2, He Ronglin2, Wu Gaihong2, Zhang Can1,2, Chen Shulin2, Zhang Tongcun1   

  1. 1. College of Biotechnology,Tianjin University of Science and Technology,Tianjin 300457 ;2. Tianjin Key Laboratory for Industrial Biological Systems and Bioprocess Engineering,Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences,Tianjin 300308
  • Received:2012-10-24 Revised:2013-04-22 Published:2013-04-22 Online:2013-04-22

摘要: 通过富集培养、平板初筛、平板点接,从土壤中筛选得到一批产木质纤维素酶系较全的菌株,经摇瓶复筛验证确 定26-6 为出发菌株。该菌经PDA 平板菌落形态观察、孢子扫描电镜观察以及ITS 序列片段分析,初步鉴定该菌为草酸青霉组菌株, 并命名为Penicillium oxalicum EH26-6。随后对菌株的摇瓶发酵条件进行研究,最终确定了最佳产酶条件:玉米芯为碳源,玉米浆 干粉为有机氮源,初始pH5.0,温度30℃,接种量10%。本研究为低成本生产复合纤维素酶系的生产提供一个备选菌株。

关键词: 筛选, 木质纤维素酶, 培养条件, 优化

Abstract: Based on enrichment culture, initial screening, and further screening by spotting vaccination, a group of degradation lignocelluloses strains were isolated from soil. Then strains were cultured in the flask to develop the repeated screening, and enzymes activity was tested, finally a filamentous fungus 26-6 was screened. Then colonial morphology of the strain on PDA plate was observed, spore morphology was also observed by scanning electron microscope. According to the ITS rDNA sequence analysis, the fungi was initially identified as a Penicillium oxalicum strain and named Penicillium oxalicum EH26-6. Culture optimization was then carried out in flask scale and finally the optimal culture condition was determined as corn cob for carbon source, corn steep powder for organic nitrogen source, pH5.0, temperature 30℃ , inoculation 10%. The research provided an alternative strain for the low cost production of composite cellulose enzyme.

Key words: Isolation, Lignocelluloses, Culture condition, Optimization