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Int J Syst Evol Microbiol 58 (2008), 1916-1921; DOI  10.1099/ijs.0.65550-0
© 2008 International Union of Microbiological Societies

Arthrobacter defluvii sp. nov., 4-chlorophenol-degrading bacteria isolated from sewage

Kwang Kyu Kim, Keun Chul Lee, Hee-Mock Oh, Mi Jeong Kim, Mi Kyung Eom 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 305-806, Republic of Korea

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

Two 4-chlorophenol-degrading bacteria, strains 4C1-aT and 4C1-b, were isolated from sewage flowing into Geumho River near the Daegu industrial complex in Korea. Cells of the strains were Gram-positive and non-motile, displayed a rod–coccus life cycle and formed creamy white colonies on R2A agar or peptone-carbohydrate agar. The strains had chemotaxonomic markers that were consistent with classification in the genus Arthrobacter, i.e. MK-9(H2) as the major menaquinone, iso- and anteiso-branched components as the predominant fatty acids, galactose, glucose and rhamnose as cell-wall sugars, peptidoglycan-type A3{alpha}, and DNA G+C content of 63.5–64.4 mol%. Phylogenetic analysis, based on 16S rRNA gene sequencing, showed that the strains were most similar to Arthrobacter chlorophenolicus DSM 12829T, Arthrobacter oxydans DSM 20119T and Arthrobacter scleromae JCM 12642T (with 98.4, 97.8 and 97.8 % similarity, respectively) and formed a separate lineage with A. chlorophenolicus in the genus Arthrobacter. Combined phenotypic data and DNA–DNA hybridization data supported the conclusion that strains 4C1-aT and 4C1-b represent a novel species in the genus Arthrobacter, for which the name Arthrobacter defluvii sp. nov. is proposed. The type strain is 4C1-aT (=KCTC 19209T=DSM 18782T).

Abbreviations: 4-CP, 4-chlorophenol

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains 4C1-aT and 4C1-b are AM409361 and AM409362, respectively.

A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences showing the positions of strains 4C1-aT and 4C1-b among all described Arthrobacter species (with the exclusion of Arthrobacter viscosus) is available as supplementary material with the online version of this paper.






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Copyright © 2008 by the International Union of Microbiological Societies.