1887

Abstract

A Gram-staining-negative, non-motile, catalase- and oxidase-positive strain, designated MS7, was isolated from freshwater of a river near Trabzon, Turkey. Its taxonomy was investigated using a polyphasic approach. The strain grew optimally at 28 °C and pH 7.5 and in the presence of 2.0 % NaCl. 16S rRNA gene sequence analysis revealed that the strain belonged to the genus ; strain MS7 showed highest sequence similarity to the type strains of (97.3 %), Algoriphagus terrigena (96.8 %), (96.2 %), (96.1 %) and (95.8 %). The major fatty acids of strain MS7 were iso-C (30.14 %) and summed future 9 (10-methyl C and/or iso-C 9 18.75 %). Polar lipid analysis revealed phosphatidylethanolamine, a variety of unidentified lipids, an unidentified aminophospholipid, an unidentified phospholipid and an unidentified aminolipid. The major isoprenoid quinone was MK-7.The DNA G+C content of MS7 was 41.6 mol%, a value consistent with that of members of the genus The level of DNA–DNA relatedness between strain MS7 and LMG 22694 was 41 %, which is clearly below the 70 % threshold accepted for species delineation. Thus, our results support the placement of strain MS7 within a separate and previously unrecognized species. On the basis of these data, the strain is considered to represent a novel species of the genus , for which the name sp. nov. is proposed. The type strain is MS7 ( = NCCB 100372 = LMG 26290). An emended description of is also provided.

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2015-07-01
2021-04-20
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