Methanogenesis from methanol at low temperatures by a novel psychrophilic methanogen, "Methanolobus psychrophilus" sp. nov., prevalent in Zoige wetland of the Tibetan plateau.

ABSTRACT: The Zoige wetland of the Tibetan plateau is at permanent low temperatures and is a methane emission heartland of the plateau; however, cold-adaptive methanogens in the soil are poorly understood. In this study, a variety of methanogenic enrichments at 15 degrees C and 30 degrees C were obtained from the wetland soil. It was demonstrated that hydrogenotrophic methanogenesis was the most efficient type at 30 degrees C, while methanol supported the highest methanogenesis rate at 15 degrees C. Moreover, methanol was the only substrate to produce methane more efficiently at 15 degrees C than at 30 degrees C. A novel psychrophilic methanogen, strain R15, was isolated from the methanol enrichment at 15 degrees C. Phylogenetic analysis placed strain R15 within the genus Methanolobus, loosely clust

SUBMITTER: Zhang G 

PROVIDER: S-EPMC2565969 | biostudies-literature | 2008 Oct

REPOSITORIES: biostudies-literature