1887

Abstract

A bacterial strain, designated TH167, was isolated from cyanobacterial aggregates in eutrophic Lake Taihu in China. Cells were observed to be slightly curved rod-shaped, motile by gliding, aerobic, Gram-stain-negative, proteorhodopsin-containing. Optimal growth was obtained at pH 7.0 (range: 6.0–9.0), 28 °C (range: 4–32 °C) and 0 % (w/v) NaCl (range: 0–2.0 %) in Reasoner’s 2A broth. No growth was observed at 37 °C. The cells were found to be positive for catalase and oxidase activities. The major fatty acids (>10 %) were identified as iso-C15 : 0, iso-C15 : 1 G and anteiso-C15 : 0. The major polar lipids of the isolate comprised phosphatidylethanolamine, one unidentified phospholipid and two unidentified aminolipids. The major respiratory quinone was menaquinone-6. The genomic G+C content of strain TH167 was 40.4 mol% based on total genome calculations. Based on similarities of 16S rRNA gene sequences, strain TH167 was affiliated with the genus Flavobacterium , exhibiting the highest sequence similarities to Flavobacterium eburneum SA31 (94.16 %), Flavobacterium yanchengense hg (94.09 %) and Flavobacterium lacus NP180 (93.95 %). The phenotypic, chemotaxonomic and phylogenetic properties, and genome analysis suggested that strain TH167 represented a novel species within the genus Flavobacterium , for which the name Flavobacterium aurantiibacter sp. nov. is proposed. The type strain is TH167 (=CGMCC 1.15805=LMG 29719).

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2018-04-09
2019-12-05
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