1887

Abstract

A Gram-reaction-negative, strictly aerobic, non-motile, yellow and rod-shaped bacterium (designated RP-2) isolated from lake water, was characterized by a polyphasic approach to clarify its taxonomic position. Strain RP-2 was observed to grow optimally at 30 °C and at pH 7.0 on R2A medium. Phylogenetic analysis based on 16S rRNA gene sequences indicated that RP-2 represented a member of the genus Niabella of the family Chitinophagaceae and was most closely related to Niabella yanshanensis KACC 14980 (96.6 %), Niabella ginsengisoli KACC 13021 (96.5 %), Niabella drilacis DSM 25811 (95.7 %) and Niabella aurantiaca KACC 11698 (95.6 %). The DNA G+C content was 44.5 mol%. The major polar lipids were diphosphatidylglycerol (DPG) and phosphatidylethanolamine (PE). The predominant quinone was MK-7. The major fatty acids were iso-C15:0, iso-C15:1G, iso-C17:0 3-OH and summed feature 3 (comprising C16:1ω7c and/or C16:1ω6c) supported the affiliation of RP-2 to the genus Niabella . However, RP-2 could be distinguished genotypically and phenotypically from the species of the genus Niabella with validly published names. The novel isolate therefore represents a novel species, for which the name Niabella aquatica sp. nov. is proposed, with the type strain RP-2 (=KACC 18623 =JCM 30952).

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2016-08-01
2019-10-19
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