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1 Division of Applied Life Science, EB-NCRC, PMBBRC, Gyeongsang National University, Jinju 660-701, Republic of Korea
2 Division of Environmental Science and Ecological Engineering, Korea University, Seoul 136-701, Republic of Korea
3 Korea Research Institute of Bioscience and Biotechnology, 52 Oeundong, Yusong, Daejeon 305-333, Republic of Korea
Correspondence
Che Ok Jeon
cojeon{at}gsnu.ac.kr
A Gram-negative, non-motile, rod-shaped bacterium, designated strain EMB47T, was isolated from activated sludge performing enhanced biological phosphorus removal in a sequencing batch reactor. Growth was observed between 10 and 40 °C (optimum, 25–35 °C) and between pH 5.0 and 8.5 (optimum, pH 7.5–8.0). The predominant fatty acids of strain EMB47T were iso-C16 : 0 3-OH, iso-C15 : 1 G, C15 : 0, iso-C15 : 0, iso-C14 : 0 and iso-C16 : 0 and it contained phosphatidylethanolamine, diphosphatidylglycerol and phosphatidylcholine as polar lipids. The G+C content of the genomic DNA was 40.8 mol% and the major quinone was MK-6. Comparative 16S rRNA gene sequence analyses showed that strain EMB47T formed a distinct phyletic line within the genus Flavobacterium. The levels of 16S rRNA gene sequence similarity with respect to Flavobacterium species were below 94.7 %. On the basis of the phenotypic, chemotaxonomic and molecular data, strain EMB47T represents a novel species within the genus Flavobacterium, for which the name Flavobacterium croceum sp. nov. is proposed. The type strain is EMB47T (=KCTC 12611T=DSM 17960T).
A transmission electron micrograph showing the general morphology of strain EMB47T is available as a supplementary figure in IJSEM Online.
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