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Paucisalibacillus globulus gen. nov., sp. nov., a Gram-positive bacterium isolated from potting soil

¹ Departamento de Zoologia and Centro de Neurociências de Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal
² Departamento de Bioquímica and Centro de Neurociências de Biologia Celular, Universidade de Coimbra, 3004-517 Coimbra, Portugal

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

A Gram-positive bacterium, designated B22^T, was isolated from potting soil produced in Portugal. This organism is a catalase-positive, oxidase-negative, motile, spore-forming, aerobic rod that grows optimally at 37 °C and pH 8.0–8.5. Optimal growth occurs in media containing 1 % (w/v) NaCl, although the organism can grow in 0–8 % NaCl. The cell wall peptidoglycan is of the A4 type with a cross-linkage containing D-Asp. The major respiratory quinone is menaquinone 7 and the major fatty acids are anteiso-15 : 0, anteiso-17 : 0 and iso-15 : 0. The DNA G+C content is 37.9 mol%. Phylogenetic analysis of 16S rRNA gene sequences revealed that strain B22^T formed a new branch within the family Bacillaceae. The novel isolate is phylogenetically closely related to members of genera of moderately halophilic bacilli and formed a coherent cluster with species of the genera Salinibacillus, Virgibacillus, Oceanobacillus and Lentibacillus, supported by bootstrap analysis at a confidence level of 71 %. Strain B22^T exhibited 16S rRNA gene pairwise sequence similarity values of 94.7–94.3 % with members of the genus Salinibacillus, 95.1–92.8 % with members of the genus Virgibacillus, 94.7–93.2 % with members of the genus Oceanobacillus and 93.1–92.3 % with members of the genus Lentibacillus. On the basis of phylogenetic analysis and physiological and biochemical characteristics, it is proposed that strain B22^T represents a novel species in a new genus, Paucisalibacillus globulus gen. nov., sp. nov. Strain B22^T (=LMG 23148^T=CIP 108857^T) is the type strain of Paucisalibacillus globulus.

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