Aidingimonas lacisalsi sp. nov., isolated from a salt lake in China

Abstract

A novel bacterium, XHU 5135^T, belonging to the genus Aidingimonas, was isolated from a salt lake sample collected in Xinjiang Province, north-west PR China. The isolate was Gram-stain-negative, rod-shaped and non-motile. The strain was catalase-positive and oxidase-negative. Growth occurred at NaCl concentrations of 5-25 % (optimum, 10-13 %), at 13-41 °C (35-37 °C) and at pH 6.0-10.0 (pH 7.0-8.0). The predominant ubiquinone was Q-9. The major fatty acids were C_{19 : 0} cyclo ω8c and C_{16 : 0}. The G+C content of the genomic DNA was 58.1 mol%. The affiliation of strain XHU 5135^T with the genus Aidingimonas was confirmed by 16S rRNA gene sequence comparisons. The closest type strain was Aidingimonas halophile YIM 90637^T, which showed a 16S rRNA gene sequence similarity of 97.5 %. The ANI value between XHU 5135^T and the closest type strain was 80.01 %. The estimated digital DNA-DNA hybridization estimate value between strain XHU 5135^T and the closest type strain was 22.80 %. Phenotypically, the characteristics of XHU 5135^T were shown to differ from the most closely related species, A. halophila. On the basis of the data from this polyphasic study, strain XHU 5135^T represents a novel species of the genus Aidingimonas, for which the name Aidingimonas lacisalsi sp. nov. is proposed. The type strain is strain XHU 5135^T (=CCTCC AB 2016344^T=KCTC 42945^T=DSM 104700^T).

Keywords: Aidingimonas lacisalsi sp. nov.; polyphasic taxonomy; salt lake.