生物技术通报 ›› 2015, Vol. 31 ›› Issue (5): 146-152.doi: 10.13560/j.cnki.biotech.bull.1985.2015.05.023

• 研究报告 • 上一篇    下一篇

纤维素酶产生菌的筛选、鉴定及发酵产酶条件优化

李争明1, 张娟1, 邓中洋1, 卢凡1, 秦文胜2,   

  1. (1.湖北工业大学资源与环境工程学院微藻实验室 工业发酵湖北省协同创新中心 河湖生态修复及藻类利用湖北省重点实验室,武汉 430068;2. Department of Biology,Lakehead University,Ontario,P7B 5E1,Canada)
  • 收稿日期:2014-09-10 出版日期:2015-05-18 发布日期:2015-05-18
  • 作者简介:李争明,男,硕士研究生,研究方向:生物化工;E-mail:lizm1987@163.com
  • 基金资助:
    湖北工业大学·楚天学者启动基金项目

Screening,Identification and Optimization of Cellulase-producing Strains

Li Zhengming1, Zhang , Juan1, Deng Zhongyang1, Lu Fan1, Qin Wensheng2   

  1. (1. Microalgae Laboratory,School of Resource & Environmental Engineering,Hubei Provincial Cooperative Innovation Center of Industrial Fermentation,Hubei Provincial Key Laboratory of Lake Ecological Restoration & Algae Utilization,Hubei University of Technology,Wuhan 430068;2. Department of Biology,Lakehead University,Ontario,P7B 5E1,Canada)
  • Received:2014-09-10 Published:2015-05-18 Online:2015-05-18

摘要: 以腐烂木材、腐殖土等材料作为菌源,从中分离出180个菌株,以期得到具有纤维素酶活性的菌株。采用革兰氏碘液染色法进行定性初筛,获得了44个纤维素酶产生菌株。将此44个菌株发酵培养后,使用滤纸酶活性测定法进行定量复筛,滤纸酶活性最高的是菌株J1-3-1。通过对J1-3-1菌株的16S rRNA 的序列测定分析,将J1-3-1鉴定为鞘氨醇杆菌(Sphingobacterium sp.)。经对J1-3-1进行产酶发酵条件优化,分别确立了产生最高滤纸酶(FPase)活性、内切葡聚糖酶(CMCase)活性和β-葡萄糖苷酶(β-glucosidase)活性的发酵条件。在最优发酵产酶条件下,菌株J1-3-1的滤纸酶、内切葡聚糖酶和β-葡萄糖苷酶的最高酶活性分别为8.76、28.04和7.02 U/mL。

关键词: 纤维素酶产生菌, 筛选, 鉴定, 发酵, 鞘氨醇杆菌

Abstract: To isolate efficient cellulase-producing bacteria, 180 bacterial isolated from rotten wood, humus, and other soil samples, and 44 were screened from them and confirmed as cellulase-producing bacteria by Gram’s iodine solution staining. In the subsequent secondary screening tests, those 44 isolates were cultured in fermentation media and their total cellulase activities(FPase)were measured and compared. The strain J1-3-1, with the highest FPase activity, was identified as Sphingobacterium sp. by 16S rRNA sequence analysis. The optimal fermentation conditions for enzymes production of J1-3-1 were determined. Under the optimal conditions, its activities of FPase, CMCase, and β-glucosidase reached 8.76, 28.04和7.02 U/mL, respectively. The results demonstrated that J1-3-1 was a promising candidate for potential industrial production of cellulase.

Key words: cellulase-producing bacteria, screening, identification, fermentation, Sphingobacterium sp.