Nitrincola salilacus sp. nov., isolated from Niya Fish Salt Lake Sediment in Xinjiang, Northwest China

A Gram-stain-negative, aerobic, rod-shaped, oxidase- and catalase-positive and non-motile bacterium, named MINF-07-Sa-05^T, was isolated from sediment samples collected from Niya Fish Salt Lake in Xinjiang, northwest China. Phylogenetic tree based on 16S rRNA gene sequences showed that strain MINF-07-Sa-05^T consistently fell within the genus <i>Nitrincola</i> and formed a clade together with <i>Nitrincola alkalilacustris</i> ZV-19^T (98.97%) and <i>Nitrincola lacisaponensis</i> 4CA^T (96.16%). Genomic average nucleotide identity values for strain MINF-07-Sa-05^T with the type strains within the genus <i>Nitrincola</i> ranged from 69.8 to 87.8%, while the <i>in silico</i> DNA-DNA hybridization values for strain MINF-07-Sa-05^T with these strains ranged from 20.4 to 33.7%. The genome sequence size of the strain was 4.81 Mb, with a DNA G+C content of 52.6 mol%. Its growth occurred at 4-40 °C, at pH 6.0-10.0, and tolerated up to 9% (w/v) NaCl. The major fatty acids contained summed feature 8 (C_18:1 <i> ω</i>7<i>c</i>/C_18:1 <i> ω</i>6<i>c</i>; 59.8%), summed feature 3 (C_16:1 <i> ω</i>7<i>c</i>/C_16:1 <i> ω</i>6<i>c</i>; 20.4%) and C_16:0 (13.8%). The primary respiratory quinone was ubiquinone-8. The main polar lipids were phosphatidylglycerol and phosphatidylethanolamine. Genomic analyses showed a high abundance of genes involved in the nitrogen, sulphur cycle and antibiotic resistance. According to the genotypic, phylogenetic and chemotaxonomic data, strain MINF-07-Sa-05^T represents a novel species within the genus <i>Nitrincola</i>, for which the name <i>Nitrincola salilacus</i> sp. nov. is proposed. The type strain is MINF-07-Sa-05^T (=GDMCC 1.4420^T=JCM 37233^T).