New combination of xylanolytic bacteria isolated from the lignocellulose degradation microbial consortium XDC-2 with enhanced xylanase activity
文献类型: 外文期刊
作者: Zhang, Dongdong 1 ; Wang, Yi 2 ; Zheng, Dan 2 ; Guo, Peng 2 ; Cheng, Wei 2 ; Cui, Zongjun 3 ;
作者机构: 1.Zhejiang Univ, Inst Marine Biol, Ocean Coll, Zhoushan 316021, Peoples R China
2.Hubei Acad Agr Sci, Inst Agr Prod Proc & Nucl Agr Technol Res, Wuhan 430064, Peoples R China
3.China Agr Univ, Coll Agron & Biotechnol, Beijing 100193, Peoples R China
关键词: Lignocellulose degradation;Extracellular xylanase activity;Synthetic microbial community;Bacillus subtilis;Clostridium sartagoforme
期刊名称:BIORESOURCE TECHNOLOGY ( 影响因子:9.642; 五年影响因子:9.237 )
ISSN:
年卷期:
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收录情况: SCI
摘要: Three bacterial strains with extracellular xylanase activity were isolated from the microbial consortium XDC-2. The aerobic strain A7, belonging to Bacillus sp., was combined with the anaerobe Clostridium sp. strain AA3 and/or Bacteroides sp. strain AA4 to obtain an efficient natural xylanolytic complex enzyme. The synthetic microbial community M1 consisting of strains Bacillus and Clostridium showed enhanced extracellular xylanase activity and production, and higher lignocelluloses degradation capability than any of the pure cultures and other synthetic microbial communities. Neither corn straw degradation nor extracellular xylanase activity was enhanced in the other synthetic microbial communities, Bacillus, Bacteroides with or without Clostridium. Quantitative polymerase chain reaction showed that the aerobic strain Bacillus enabled the growth of the anaerobic strain Clostridium, but not that of the anaerobic strain Bacteroides. These findings suggest that strains Bacillus and Clostridium can coexist well and have a positive synergistic interaction for extracellular xylanase secretion and lignocellulose degradation. (C) 2016 Elsevier Ltd. All rights reserved.
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