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Roseibacterium elongatum gen. nov., sp. nov., an aerobic, bacteriochlorophyll-containing bacterium isolated from the west coast of Australia

Department of Applied Biological Science, Tokyo University of Science, 2641, Yamazaki, Noda, Chiba 278-8510, Japan

Correspondence
Tomonori Suzuki
chijun{at}rs.noda.tus.ac.jp

A novel aerobic, chemoheterotrophic, bacteriochlorophyll-containing bacterium, strain OCh 323^T, was isolated from sand at Monkey Mia, Shark Bay, located on the west coast of Australia. The cells were Gram-negative, non-motile rods of variable length; one or both cell poles was narrower. Bacteriochlorophyll a was synthesized under aerobic conditions. Catalase, oxidase and urease were produced. The ONPG reaction was positive. The major component of the cellular fatty acid was octadecenoic acid (18 : 1). The DNA G+C content was 68·1 mol%. The results of 16S rRNA gene sequence comparisons revealed that strain OCh 323^T formed a novel, separate line of descent within the -3 group of the Alphaproteobacteria. The similarity value for the 16S rRNA gene sequence of strain OCh 323^T and that of the most closely related species, Rhodovulum sulfidophilum, was 91·4 %. It is concluded that strain OCh 323^T (=JCM 11220^T=CIP 107377^T) should be placed in a novel genus, Roseibacterium gen. nov., as the type strain of a novel species Roseibacterium elongatum sp. nov.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain OCh 323^T is AB061273.

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