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Bacillus foraminis sp. nov., isolated from a non-saline alkaline groundwater

¹ Departamento de Zoologia, Universidade de Coimbra, 3004-517 Coimbra, Portugal
² Centro de Neurociências de Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal
³ Departamento de Bioquímica, Universidade de Coimbra, 3004-517 Coimbra, Portugal
⁴ Instituto do Ambiente e Vida, Universidade de Coimbra, 3004-517 Coimbra, Portugal

Correspondence
António Veríssimo
averiss{at}ci.uc.pt

A low-G+C-content Gram-positive bacterium, designated CV53^T, phylogenetically related to species of the genus Bacillus, was isolated from a highly alkaline non-saline groundwater environment (pH 11.4). This organism comprised rod-shaped cells, was aerobic, did not display spore formation, was catalase- and oxidase-negative, had an optimum growth temperature of 40 °C and had an optimum pH of approximately 7.0–8.5. Optimal growth was observed in the absence of NaCl, but growth did occur at NaCl concentrations up to 3.0 %. The strain possessed an A1-type peptidoglycan cell wall and the major respiratory quinone was MK-7. The predominant fatty acids were anteiso-C_{15 : 0}, iso-C_{15 : 0} and anteiso-C_{17 : 0}. The G+C content of the DNA was 43.1 mol%. Phylogenetic analyses of the 16S rRNA gene sequence revealed that the novel isolate is closely related to the type strain of Bacillus jeotgali, forming a coherent cluster supported by bootstrap analysis at a confidence level of 90 %. The pairwise similarity of the 16S rRNA gene sequences of the two strains is 97.7 %. On the basis of the phylogenetic analyses and the distinct phenotypic characteristics, strain CV53^T represents a novel species within the genus Bacillus, for which we propose the name Bacillus foraminis sp. nov. The type strain is CV53^T (=LMG 23174^T=CIP 108889^T).

A comparison of the fatty acid compositions of strain CV53^T and B. jeotgali YKJ-10^T is available as supplementary material in IJSEM Online.

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