1887

Abstract

A yellow-pigmented, Gram-staining-negative, aerobic, non-motile and rod-shaped bacterium, designated strain F30, was isolated from fresh water of a diseased farmed Murray cod with a profound ulceration pond in Zhejiang province, PR China. Growth was observed at NaCl concentrations of 0.5–3.5 % (w/v) (optimum, 1.5–2.0 %), temperatures of 10–35 °C (optimum, 28 °C) and pH 5.0–9.0 (optimum, 6.5). Phylogenetic analysis based on 16S rRNA gene sequences indicated that F30 represented a member of the genus Chryseobacterium , showing the highest similarity to Chryseobacterium jejuense DSM 19299 (99.0 %) and Chryseobacterium nakagawai NCTC 13529 (99.0 %), and less than 98.7 % similarity to other species of the genus Chryseobacterium with validly published names. The average nucleotide identity and in silico DNA–DNA hybridization values between F30 and the reference strains were 78.4–90.5 % and 2.6–42.5 %, respectively. The results of chemotaxonomic analysis indicated that the fatty acids, as well as the polar lipid profiles of F30 were similar to those of species of the genus Chryseobacterium , and the sole respiratory quinone was MK-6. On the basis of its phylogenetic, chemotaxonomic and phenotypic data, strain F30 represents a novel species, for which the name Chryseobacterium aurantiacum sp. nov. is proposed. The type strain is F30 (=KCTC 62135=MCCC 1K03457).

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2018-10-01
2024-11-13
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