1887

Abstract

One novel Gram-stain-negative, long rod-shaped, non-spore-forming, non-motile, non-flagellated and strictly aerobic strain, designated M124, was isolated from diseased Pacific white shrimp larvae. Growth occurred at 16–37 °C (optimum 28 °C), in the presence of 2–5 % (w/v) NaCl (optimum 3 %) and at pH 7–8 (optimum pH 7). Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain M124 belonged to the genus and showed highest sequence similarity to P3-1 (96.4 %). The dominant fatty acids of the isolate were iso-C and iso-C 3-OH. The major polar lipids comprised phosphatidylethanolamine, one unknown aminolipid, three unknown phospholipids, two unknown glycolipids and one unknown polar lipid. The major respiratory quinone was menaquinone 6 (MK-6). The DNA G+C content of strain M124 was 33.7 mol%. Based on the polyphasic analyses in this study, strain M124 is considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is M124 ( = KCTC 42423 = MCCC 1K00498).

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2016-01-01
2020-01-23
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