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Bacillus koreensis sp. nov., a spore-forming bacterium, isolated from the rhizosphere of willow roots in Korea

¹ Korea Research Institute of Bioscience and Biotechnology, 52 Oeundong, Yusong, Daejeon 305-333, Republic of Korea
² Environmental Biotechnology National Core Research Center, PMBBRC, Division of Environmental Biotechnology, Gyeongsang National University, Jinju 660-701, Korea

Correspondence
Chang-Jin Kim
changjin{at}kribb.re.kr

An endospore-forming, rod-shaped bacterium was isolated from the rhizosphere of willow roots in Korea. The bacterium, designated strain BR030^T, was a strictly aerobic, motile rod. The cell wall contained type A1 peptidoglycan with meso-diaminopimelic acid as the diagnostic diamino acid. The major cellular fatty acids were anteiso-C_{15 : 0}, iso-C_{15 : 0}, iso-C_{14 : 0} and iso-C_{16 : 0}. The major cellular phospholipids were phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine and unknown phospholipids (PL1, PL2). The genomic DNA G+C content was 36 mol%. Comparative 16S rRNA gene sequence analyses showed that strain BR030^T formed a distinct phyletic line within the genus Bacillus and was most closely related to Bacillus flexus DSM 1320^T, with 16S rRNA gene sequence similarity of 96·8 %. Sequence similarities to other type strains were lower than 96·2 %. On the basis of physiological and molecular properties, the isolate represents a novel species within the genus Bacillus, for which the name Bacillus koreensis sp. nov. is proposed. The type strain is BR030^T (=KCTC 3914^T=DSM 16467^T).

Published online ahead of print on 2 September 2005 as DOI 10.1099/ijs.0.63701-0.

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of Bacillus koreensis sp. nov. BR030^T is AY667496.

A transmission electron micrograph showing the spore morphology of Bacillus koreensis sp. nov. and tables detailing fatty acid profiles and the results of DNA hybridization studies are available as supplementary material in IJSEM Online.

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