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Int J Syst Evol Microbiol 58 (2008), 845-851; DOI  10.1099/ijs.0.65325-0
© 2008 International Union of Microbiological Societies

Bacillus aurantiacus sp. nov., an alkaliphilic and moderately halophilic bacterium isolated from Hungarian soda lakes

Andrea K. Borsodi1, Károly Márialigeti1, Gitta Szabó1, Márton Palatinszky1, Beatrix Pollák1, Zsuzsa Kéki1, Attila L. Kovács2, Peter Schumann3 and Erika M. Tóth1

1 Department of Microbiology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary
2 Department of Anatomy, Cell and Developmental Biology, Eötvös Loránd University, Pázmány P. sétány 1/C, H-1117 Budapest, Hungary
3 DSMZ – Deutsche Sammlung von Mikroorganismen und Zellkulturen GmbH, Inhoffenstr. 7b, D-38124 Braunschweig, Germany

Correspondence
Andrea K. Borsodi
bandrea{at}ludens.elte.hu

Three alkaliphilic and moderately halophilic strains designated K1-5T, K1-10 and B1-1, characterized by optimal growth at pH 9.0–10.0 and at 3–7 % (w/v) NaCl, were isolated from extremely shallow, alkaline soda lakes located in Hungary. Cells of the strains are Gram-positive, straight rods and form a central to subterminal, ellipsoidal endospore. The isolates are strictly aerobic, catalase-positive, oxidase-negative and contain a peptidoglycan of type A1{gamma} based on meso-diaminopimelic acid. In strain K1-5T, menaquinone-7 (MK-7) is the predominant isoprenoid quinone and anteiso-C15 : 0 is the major cellular fatty acid. The DNA G+C content of strain K1-5T is 42.9 mol%. 16S rRNA gene-based phylogenetic analysis revealed that the strains exhibit levels of sequence similarity of less than 95.8 % to known Bacillus species. According to the polyphasic characterization, the strains represent a novel species, for which the name Bacillus aurantiacus sp. nov. is proposed. The type strain is K1-5T (=DSM 18675T =CCM 7447T =NCAIM B002265T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains K1-5T, K1-10 and B1-1 are AJ605773, AJ605772 and AJ606036, respectively.

Detailed Biolog GP2 test results for the novel strains are available as supplementary material with the online version of this paper.






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