1887

Abstract

A chemo-organotrophic, aerobic, facultatively anaerobic, non-motile strain, MWH-C5, isolated from the water column of the oligomesotrophic Lake Mondsee (Austria), was characterized phenotypically, phylogenetically and chemotaxonomically. The predominant fatty acids of the strain were C 7/6, C, C and C-3OH, the major quinone was ubiquinone Q-8 and the G+C content of the DNA of the strain was 55.5 mol%. 16S rRNA gene similarity to the closest related type strains was 96.6 % ( LMG 4328) and 95.7 % ( FR3). Phylogenetic analysis of 16S rRNA gene sequences revealed the affiliation of the strain with the family (); however, the phylogenetic position of the strain did not support an affiliation to any previously described genus within this family. A family-wide comparison of traits revealed that the strain possesses a unique combination of DNA G+C content, major fatty acids and major 3-hydroxy fatty acid. Furthermore, the strain differs in several traits from the closest related genera. Based on the phylogeny of the strain and differences from closely related genera, we propose to establish the new genus and species gen. nov., sp. nov. to accommodate this strain. The type strain of is MWH-C5 (=DSM 21645 =CCUG 56720). The type strain is closely related to a large number of uncultured bacteria detected by cultivation-independent methods in various freshwater systems.

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2010-06-01
2024-12-03
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