1887

Abstract

A yellow-pigmented bacterial strain (JR1) isolated from a sediment sample was subjected to a taxonomic study, based on phenotypic, genetic and physiological characterization. Here, we describe the cultivation and characteristics of strain JR1, a novel member of the genus Carboxylicivirga in the family Marinilabiliaceae . Cells of strain JR1 were rod-shaped, Gram-stain-negative, non-motile and facultatively anaerobic. The temperature range for growth was 15–42 °C (optimum, 33 °C) and the pH range for growth was pH 6.0–8.5 (optimum, pH 7.0–7.5). Growth occurred in the presence of 0.0–10.0 % (w/v) NaCl (optimum 2.0–3.0 %). 16S rRNA gene sequence analysis produced results with 97.4 % similarity to Carboxylicivirga taeanensis MEBiC 08903, 96.8 % similarity to Carboxylicivirga mesophila MEBiC 07026, 94.9 % similarity to Carboxylicivirga linearis FB218 and 94.6 % similarity to Carboxylicivirga flava Q15. The DNA G+C content was 42.3 mol% and the major fatty acids were iso-C15 : 0, C15 : 0, anteiso-C15 : 0, C17 : 1ω6c and iso-C17 : 0-3OH. The major polar lipids detected were phosphatidylethanolamine and two unidentified lipids; the major respiratory quinone detected was MK-7. The results of the phenotypical, phylogenetic and biochemical analyses between the study strain and some related type strains indicated that this strain represent a novel species of the genus Carboxylicivirga within the family Marinilabiliaceae , for which the name Carboxylicivirga sediminis sp. nov. is proposed. The type strain is JR1 (=MCCC 1K03323=KCTC 52869).

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2018-04-16
2019-10-16
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