1887

Abstract

The heterotrophic, aerobic, facultatively anaerobic under denitrifying conditions, catalase- and oxidase-positive, non-motile strain MT-CBb6A5, which was isolated from an acidic lake located in Wisconsin (USA), was characterized. The strain grew on NSY medium over a temperature range of 15–30 °C and a NaCl range of 0.0–0.3 % (w/v). The predominant fatty acids were C, Cω7, 11-methyl Cω7, feature 3 (including Cω7), and feature 2 (including C 3-OH). The DNA G+C content of the strain was 40.3 mol%. Phylogenetic analysis as well as strong similarities in phenotypic and chemotaxonomic traits indicated the affiliation with the genus . 16S rRNA gene sequence similarity values with the two described species of the genus ranged from 95.6 to 96.0 %. The strain differs from the two described species of the genus in the ability to assimilate oxalic and glycolic acids, and in the presence of the fatty acids Cω8 and C 3-OH as well as in quantitative differences in fatty acid composition. It has to be assumed that the strain shares with other free-living bacteria of the genus a planktonic lifestyle in the water column of freshwater habitats. Based on the phylogeny revealed and the chemotaxonomic and phenotypic differences from and , we propose to establish the novel species sp. nov. with the type strain MT-CBb6A5 ( = DSM 21648  = CIP 109928).

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2011-04-01
2019-10-23
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