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Rubrimonas cliftonensis gen. nov., sp. nov., an aerobic bacteriochlorophyll-containing bacterium isolated from a saline lake

¹Department of Applied Biological Science, Science University of Tokyo, 2641, Yamazaki, Noda, Chiba 278-8510, Japan
²Department of Food Science and Technology, National Fisheries University, 2-7-1, Nagata-Honmachi, Shimonoseki, Yamaguchi 759--6595, Japan

Author for correspondence: Tomonori Suzuki. Tel: +81 471 24 1501. Fax: +81 471 23 9767. e-mail: chijun{at}rs.noda.sut.ac.jp

ABSTRACT

Phenotypic and phylogenetic studies were performed with two strains (OCh 317^Tand OCh 318; T = type strain) of aerobic chemoheterotrophic bacteriochlorophyll-containing bacteria isolated from water of a saline lake located on the west coast of Australia. Both strains were Gram-negative, short rods and were motile by means of polar flagella. Catalase, oxidase, nitrate reductase, phosphatase and urease were produced. The cells utilized D-glucose, citrate, glycolate, pyruvate and ethanol. Acids were produced from L-arabinose, D-fructose, D-galactose, D-glucose, D-ribose and D-xylose. The strains could grow in media containing 0.5--7.5% NaCl. Bacteriochlorophyll a was synthesized under aerobic conditions. The results of 16S rRNA gene sequence comparisons revealed that strain OCh 317^Trepresented a new lineage in the -3 group of the class Proteobacteria. Strains OCh 317^Tand OCh 318 were identified as strains of the same species because of their very similar phenotypic characteristics and their previously described high DNA-DNA homology. Therefore, it was concluded that the two strains should be assigned to a new genus and species, for which the name Rubrimonas cliftonensis is proposed. The type strain is OCh 317^T(= JCM 10189^T).

Key Words: Rubrimonas cliftonensis • aerobic bacteriochlorophyll-containing bacteria • saline lake • 16S rRNA

The DDBJ accession number for the 16S rRNA gene sequence of strain OCh 317^T is D85834.

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