Olga V. Danilova

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An aerobic methanotrophic bacterium was isolated from an acidic (pH 3.9) Sphagnum peat bog in north-eastern Russia and designated strain MG30(T). Cells of this strain were Gram-negative, pale pink-pigmented, non-motile, thick rods that were covered by large polysaccharide capsules and contained an intracytoplasmic membrane system typical of type I(More)
Although representatives with spiral-shaped cells are described for many functional groups of bacteria, this cell morphotype has never been observed among methanotrophs. Here, we show that spiral-shaped methanotrophic bacteria do exist in nature but elude isolation by conventional approaches due to the preference for growth under micro-oxic conditions. The(More)
A light-pink-pigmented, microaerophilic bacterium was obtained from a methanotrophic consortium enriched from acidic Sphagnum peat and designated strain Pf56(T). Cells of this bacterium were Gram-negative, non-motile, thick curved rods that contained a vesicular intracytoplasmic membrane system characteristic of some purple non-sulfur alphaproteobacteria.(More)
An aerobic methanotrophic bacterium was isolated from a collapsed palsa soil in northern Norway and designated strain NE2T. Cells of this strain were Gram-stain-negative, non-motile, non-pigmented, slightly curved thick rods that multiplied by normal cell division. The cells possessed a particulate methane monooxygenase enzyme (pMMO) and utilized methane(More)
This study examined potential disturbances of methanotrophic communities playing a key role in reducing methane emissions from the peat bog Tasin Borskoye (Vladimir oblast, Russia), as a result of the wildfire in 2007. The potential activity of the methane-oxidizing filter in the burned peatland sites and the abundance of indigenous methanotrophic bacteria(More)
This study assessed the microbial diversity, activity, and composition of methane-oxidizing communities of a subarctic wetland in Russia with mosaic cover of Sphagnum mosses and lichens of the genera Cladonia and Cetraria. Potential methane-oxidizing activity of peat sampled from lichen-dominated wetland sites was higher than that in the sites dominated by(More)
Two isolates of aerobic methanotrophic bacteria, strains Sph1T and Sph2, were obtained from cold methane seeps in a floodplain of the river Mukhrinskaya, Irtysh basin, West Siberia. Another morphologically and phenotypically similar methanotroph, strain OZ2, was isolated from a sediment of a subarctic freshwater lake, Archangelsk region, northern Russia.(More)
Numeric abundance, identity, and pH preferences of methanotrophic Gammaproteobacteria (type I methanotrophs) inhabiting the northern acidic wetlands were studied. The rates of methane oxidation by peat samples from six wetlands of European Northern Russia (pH 3.9–4.7) varied from 0.04 to 0.60 μg CH4 g−1 peat h−1. The number of cells revealed by(More)
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