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Published online ahead of print on 11 August 2009 as doi:ijs.0.014233-0
 Int J Syst Evol Microbiol (2009); DOI 10.1099/ijs.0.014233-0
© 2009 International Union of Microbiological Societies
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Bacillus halochares sp. nov., a halophilic bacterium isolated from solar salterns

A. Pappa1, C. Sánchez-Porro2, P. Lazoura1, A. Kallimanis1, A. Perisynakis1, A. Ventosa2, C. Drainas1 and A. I. Koukkou1,3

1 Dept of Chemistry, University of Ioannina;
2 Dept of Microbiology and Parasitology, Faculty of Pharmacy, University of Sevilla

3 E-mail: akukku{at}cc.uoi.gr

A novel halophilic bacterium, designated strain MSS4T, was isolated from the solar salterns of Mesolongi, Greece. The microorganism, a motile, Gram positive, aerobic rod, proliferated at salinities ranging 1.0 to 4.0 M NaCl, with an optimal growth at 2.5 M NaCl. Endospores were not observed. Strain MSS4T showed an optimal growth at 37 °C and pH 8.0. The G+C content of its DNA was 47.2 mol%. The polar lipid pattern of strain MSS4T consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidic acid and phosphatidylethanolamine. It possessed anteiso-C15:0, C18:0, C16:0 and anteiso-C17:0 as the major fatty acids (altogether representing 84.7 % of total). The predominant isoprenoid quinone of strain MSS4T was MK-7. The cell-wall peptidoglycan contained meso-diaminopimelic acid. The 16S rRNA sequence analysis showed that the new isolate has 96.1 % similarity with Bacillus qingdaonensis CM1T and Bacillus aidingensis 17-5T, 95.5% with Bacillus salarius BH169T and lower similarity values with other Bacillus species. These results justify strain MSS4T as a new species within the genus Bacillus, for which the name Bacillus halochares sp. nov. is proposed. The type strain is MSS4T (=LMG 24571T =DSM 21373T).






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