[Bioconversion of cellulose to methane by a consortium consisting of four microbial strains].
Cellulose was usually degraded by microbial communities in natural habitats. Construction of a simple cellulolytic consortium is necessary to understand the underlying interaction within microorganisms involved in cellulose conversion. A screening approach was developed to obtain a simple microbial community with the ability of cellulose degradation to methane. This technique was based on the method of enrichment culture accompanying with denaturing gel gradient electrophoresis (DGGE) fingerprint detection technology and roll-tube method. Moreover, a four-strain mixed culture capable of degrading cellulose to methane was isolated from Zoige alpine wetland of the Tibetan Plateau. The results showed that the microbial consortia consisted of three functional groups: the cellulolytic bacterium Clostridium glycolicum, the non-celluloytic bacteria group of Trichococcus flocculiformis and Parabacteroides merdae, and the methanogenic bacterium Methanobacterium subterraneum. This four-strain co-culture can convert cellulose to methane. In the future, the isolated cellulolytic consortia could provide a platform for controlling metabolic pathways and genetic modification involved in methane production from cellulose.
Jun-Mei
JM
Wu
An-Zhou
AZ
Ma
Meng-Meng
MM
Cui
Qing
Q
Yu
Hong-Yan
HY
Qi
Xu-Liang
XL
Zhuang
Guo-Qiang
GQ
Zhuang
D041963:Bacteroidetes / Q000378:metabolism; D056568:Carnobacteriaceae / Q000378:metabolism; D002482:Cellulose / Q000378:metabolism*; D003013:Clostridium / Q000378:metabolism; D018920:Coculture Techniques; D058645:Denaturing Gradient Gel Electrophoresis; D008697:Methane / Q000378:metabolism*; D017014:Methanobacterium / Q000378:metabolism; D059013:Microbial Consortia
D002482:Cellulose; D008697:Methane