1887

Abstract

Strains 2SM5 and 2SM6, two strictly aerobic chemo-organotrophic gammaproteobacteria, were isolated from Mediterranean seawater off the coast of Vinaroz, Castellón, Spain, in February, 1990. They were extensively characterized by a polyphasic study that placed them in the genus . Phylogenetic analysis of 16S rRNA gene sequences showed that both strains shared 100 % sequence similarity and were closely related to members of the clade, with less than 97.3 % similarity to strains of established species; was the closest relative. Analysis of sequences of three housekeeping genes, , and , further confirmed the phylogenetic assignment of the Mediterranean isolates. Chemotaxonomic traits such as quinone and polar lipid composition also corroborated the placement of strains 2SM5 and 2SM6 in the gammaproteobacteria. Other phenotypic traits, including fatty acid composition, enabled clear differentiation of both isolates from other species of . We therefore conclude that strains 2SM5 and 2SM6 represent a novel species of , for which the name is proposed; the type strain is 2SM5 ( = CECT 7670 = KCTC 23093).

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2012-02-01
2020-01-22
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