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Int J Syst Evol Microbiol 58 (2008), 1616-1620; DOI  10.1099/ijs.0.65763-0
© 2008 International Union of Microbiological Societies

Microbacterium aquimaris sp. nov., isolated from seawater

Kwang Kyu Kim, Keun Chul Lee, Hee-Mock Oh and Jung-Sook Lee

Korean Collection for Type Cultures, Biological Resource Center, Korea Research Institute of Bioscience and Biotechnology, 52 Eoeun-dong, Yuseong-gu, Daejeon 305-333, Republic of Korea

Correspondence
Jung-Sook Lee
jslee{at}kribb.re.kr

Strains JS54-2T and JS63-1 were isolated from seawater at Jeju, Korea. Cells of these strains were Gram-positive, non-motile, non-spore-forming, short rods and formed yellow-pigmented colonies on tryptic soy agar. The strains had chemotaxonomic markers that were consistent with their classification in the genus Microbacterium, i.e. MK-11, MK-12 and MK-10 as the major menaquinones, fatty acids that were predominantly iso- and anteiso-branched, galactose and glucose as the cell-wall sugars, peptidoglycan-type B2β with glycolyl residues and DNA G+C contents of 69.3–69.6 mol%. A phylogenetic analysis based on 16S rRNA gene sequences showed that the strains were closely related to Microbacterium oleivorans DSM 16091T and Microbacterium halophilum IFO 16062T (with 97.7 and 97.4 % sequence similarity, respectively) and formed a separate lineage with M. halophilum in the genus Microbacterium. Data from DNA–DNA hybridization and phenotypic analyses supported the conclusion that strains JS54-2T and JS63-1 represent a novel species in the genus Microbacterium, for which the name Microbacterium aquimaris sp. nov. is proposed. The type strain is JS54-2T (=KCTC 19124T =DSM 19713T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains JS54-2T and JS63-1 are AM778449 and AM778450, respectively.

An extended version of the 16S rRNA gene sequence-based phylogenetic tree and DNA–DNA hybridization results for strains JS54-2T and JS63-1 and the type strains of closely related Microbacterium species are available as supplementary data with the online version of this paper.






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Copyright © 2008 by the International Union of Microbiological Societies.