Journal
FEMS MICROBIOLOGY ECOLOGY
Volume 44, Issue 3, Pages 347-354Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0168-6496(03)00073-4
Keywords
soil; methane oxidising bacterium; isolation; natural medium; 16S rRNA hybridisation; ERIC-PCR fingerprinting
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A new method for isolation of methane oxidising bacteria (methanotrophs) is presented. Soil samples from a wetland area and a landfill were plated on polycarbonate membranes, which were incubated in a methane-air atmosphere using a non-sterile soil suspension as the medium. The membrane acted as a permeable growth support. The membrane method resulted in selective growth conditions, which allowed isolation of methane oxidising bacteria. The method resulted in isolation of both type I and type II methanotrophs from natural wetland and landfill soils. The isolates obtained from the landfill were dominated by type II methanotrophs and included several isolates carrying the gene for soluble methane monooxygenase (sMMO). Repetitive element sequence-based PCR fingerprinting documented genotypic diversity at the strain level. The presented method is a promising tool for easy and rapid isolation of different indigenous methanotrophs from an environment of interest. (C) 2003 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
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