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Roseomonas lacus sp. nov., isolated from freshwater lake sediment

State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Zhong-Guan-Cun, Haidian, Beijing 100080, P. R. China

Correspondence
Shuang-Jiang Liu
shuangjiang{at}hotmail.com

An aerobic, Gram-negative bacterial strain, TH-G33^T, was isolated from freshwater sediment of Taihu Lake in China. The taxonomy of strain TH-G33^T was studied by using phenotypic and phylogenetic methods. Cells of strain TH-G33^T were coccoid rods or rods and formed colourless to pale-pink colonies on nutrient agar. Phylogenetic analysis based on nearly complete 16S rRNA gene sequences showed that strain TH-G33^T was related to Roseomonas mucosa (94·4 %), Roseomonas gilardii subsp. gilardii (94·1 %), Roseomonas gilardii subsp. rosea (94·8 %) and Roseomonas cervicalis (93·9 %). Cells contained ubiquinone 10 (Q-10) as the major quinone and the G+C content was 71·9 mol%. Thus, strain TH-G33^T represents a novel species of the genus Roseomonas, for which the name Roseomonas lacus sp. nov. is proposed. The type strain is TH-G33^T (=CGMCC 1.3617^T=JCM 13283^T).

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Roseomonas lacus TH-G33^T is AJ786000.

A table showing the cellular fatty acid profile of Roseomonas lacus TH-G33^T is available as supplementary material in IJSEM Online.

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