An active mesophilic lignocellulose degrading microbial consortium, designated LZF-12, was bred from humus-rich soil by successive subcultivation under facultative aerobic static condition. Batch experiments were perf...An active mesophilic lignocellulose degrading microbial consortium, designated LZF-12, was bred from humus-rich soil by successive subcultivation under facultative aerobic static condition. Batch experiments were performed to investigate the structural and functional stability of lignocellulose degradation of rice straw of 10 g · L-1. The results showed that efficient degradation of rice straw(>70%) could be achieved and acetic acid concentration accounted for over 70% of total aqueous products from different generations by microbial consortium LZF-12 within 7 days. Denaturing gradient gel electrophoresis(DGGE) and sequencing of 16 S r DNA sequences amplified from the total consortium DNA representing the presence of sequences were related to those of Clostridium, Clostridium cellulolyticum, Pseudomonas, Acetivibrio and some uncultured bacteria in LZF-12. DGGE pattern profiles from different LZF-12 generations were reproducible, suggesting the relative stabilities of the microbial community structure and succession mechanism in the established consortium.展开更多
基金Supported by Natural Science Fund of Heilongjiang Province(E2015023)Postdoctoral Launch Fund of Heilongjiang Province(LBH-Q13023)
文摘An active mesophilic lignocellulose degrading microbial consortium, designated LZF-12, was bred from humus-rich soil by successive subcultivation under facultative aerobic static condition. Batch experiments were performed to investigate the structural and functional stability of lignocellulose degradation of rice straw of 10 g · L-1. The results showed that efficient degradation of rice straw(>70%) could be achieved and acetic acid concentration accounted for over 70% of total aqueous products from different generations by microbial consortium LZF-12 within 7 days. Denaturing gradient gel electrophoresis(DGGE) and sequencing of 16 S r DNA sequences amplified from the total consortium DNA representing the presence of sequences were related to those of Clostridium, Clostridium cellulolyticum, Pseudomonas, Acetivibrio and some uncultured bacteria in LZF-12. DGGE pattern profiles from different LZF-12 generations were reproducible, suggesting the relative stabilities of the microbial community structure and succession mechanism in the established consortium.
