1887

Abstract

A novel bacterial strain, designated AA5, was isolated from sediment in a fishbowl. Cells were Gram-stain-negative, rod-shaped and strictly aerobic, showing gliding motility. Strain AA5 was able to grow at 15–37 °C, at pH 5.0–8.0 and in the absence of NaCl. 16S rRNA gene sequence analysis revealed that strain AA5 was most closely related to species in the genus Sediminibacterium , showing highest similarity to the type strain of S.ediminibacterium goheungense (96.6 %). Concordantly, a phylogenetic tree based on 16S rRNA gene sequences indicated that strain AA5 belongs to the genus Sediminibacterium . The DNA G+C content was 44.7 mol%. The major polar lipids were phosphatidylethanolamine, four unidentified aminolipids, two unknown aminophospholipids and four unidentified polar lipids. The only respiratory quinone of strain AA5 was menaquinone 7 (MK-7) and the major fatty acids (>5 % of the total) were iso-C15 : 0, iso-C15 : 1 G, iso-C16 : 0 3-OH, iso-C17 : 0 3-OH and iso-C15 : 0 3-OH. Based on data from this polyphasic study, strain AA5 represents a novel species, for which the name Sediminibacterium aquarii sp. nov. is proposed. The type strain is AA5 (=KACC 18509=JCM 31013).

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2016-11-01
2019-12-09
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