1887

Abstract

A novel Gram-negative, aerobic, non-spore-forming, non-motile and rod-shaped bacterium, designated J26, was isolated from the sediment of a river in Ronggui, Foshan city, China. Strain J26 grew optimally at 0 % (w/v) NaCl, pH 6.5–7.5, and 30 °C, and it formed milky white irregular colonies on Reasoner's 2A agar medium. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain J26 had the highest similarity to RCRI19 (97.1 %) and formed a distinct clade in the genus . Cellular components of J26 supported this strain as a member of the genus . The predominant fatty acids were C 7, C 7-11 methyl and C. Polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphorylethanolamine. Ubiquinone Q-10 was the major respiratory quinone, and the DNA G+C content was 64.2 mol%. However, low 16S rRNA gene sequence similarity and average nucleotide identity (73.56 % for ANIb between strain J26 with RCRI19) demonstrated that strain J26 should be assigned to a novel species. Moreover, the differences between J26 and RCRI19 in terms of physiological and biochemical properties, such as carbon, nitrogen and sulphur metabolism, further supported that J26 represents a novel species, for which the name sp. nov. is proposed. The type strain is J26 (=GDMCC 1.2843=KCTC 92112).

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2022-10-19
2024-12-07
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