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Int J Syst Evol Microbiol 59 (2009), 1162-1166; DOI  10.1099/ijs.0.004978-0
© 2009 International Union of Microbiological Societies

Flavobacterium sasangense sp. nov., isolated from a wastewater stream polluted with heavy metals

Hwan Sik Yoon1, Zubair Aslam1, Geun Cheol Song1, Seon Won Kim1, Che Ok Jeon2, Tae Soo Chon3 and Young Ryun Chung1

1 Division of Applied Life Science (BK21), PMBBRC and EB-NCRC, Gyeongsang National University, Jinju 660-701, Republic of Korea
2 Division of Life Science, Chung-Ang University, Seoul 156-756, Republic of Korea
3 Division of Biological Sciences, Pusan National University, Busan 609-735, Republic of Korea

Correspondence
Young Ryun Chung
yrchung{at}gnu.ac.kr

A Gram-negative, rod-shaped bacterium, designated strain YC6274T, was isolated from a stream (Sasang) carrying wastewater polluted with heavy metals in Busan, Korea. Growth was observed at 10–35 °C (optimum, 30 °C) and pH 6.0–9.5 (optimum, pH 7.5–8.0). Comparative 16S rRNA gene sequence analyses showed that the strain was most closely related to Flavobacterium cucumis R2A45-3T (96.6 % similarity), F. aquatile ATCC 11947T (93.7 %), F. croceum EMB47T (93.3 %), F. indicum GPTSA100-9T (93.3 %) and F. terrigena DS-20T (93.2 %). Sequence similarities with strains of other Flavobacterium species with validly published names were lower than 93.0 %. Phylogenetic analysis based on the 16S rRNA gene sequence showed that strain YC6274T formed a distinct phyletic lineage within the genus Flavobacterium. The predominant fatty acids of strain YC6274T were iso-C15 : 0, iso-C16 : 0, iso-C15 : 1 G, iso-C17 : 0 3-OH, iso-C16 : 0 3-OH and iso-C15 : 0 3-OH. The G+C content of the genomic DNA was 32.5 mol% and the major quinone was MK-6. On the basis of phenotypic, chemotaxonomic and molecular data, it is clear that strain YC6274T represents a novel species within the genus Flavobacterium, for which the name Flavobacterium sasangense sp. nov. is proposed. The type strain is YC6274T (=KCTC 22246T =DSM 21067T).

Abbreviations: ML, maximum-likelihood; MP, maximum-parsimony; NJ, neighbour-joining

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain YC6274T is EU423319.

A transmission electron micrograph of a cell of strain YC6274T and 16S rRNA gene sequence-based maximum-likelihood and maximum-parsimony trees are available as supplementary material with the online version of this paper.






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