Simplicispira sedimenti sp. nov., isolated from a sediment of drainage ditch in winery

Abstract

A Gram-stain-negative, motile (by single polar flagellum) and rod-shaped bacterium, designated W1-6^T, was isolated from a sediment of drainage ditch in winery in Guiyang, south-western China. Strain W1-6^T showed the highest 16S rRNA gene sequence similarities with the type strain of Acidovorax wautersii (98.1%) and Simplicispira lacusdiani (97.9%). Phylogenetic analysis based on 16S rRNA gene sequences showed that strain W1-6^T was placed adjacent to the members of the genus Simplicispira and formed a separat subclade. Cells showed oxidase and catalase negative reactions. The only respiratory quinone detected was ubiquinone-8 (Q-8). Summed feature 3 (C_16:1 ω7c and/or C_16:1 ω6c), C_16:0 and summed feature 8 (C_18:1 ω7c and/or C_18:1 ω6c) were predominant cellular fatty acids (> 10%) of strain W1-6^T. Diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and five unidentified phospholipids were found in the polar lipid extraction. The genomic DNA G + C content was 65.6%. Strain W1-6^T shared the highest digital DNA-DNA hybridization [dDDH, (27.6%)] and average nucleotide identity [ANI (84.3%)] values with the type strain of S. lacusdiani. The dDDH and ANI values were below the cutoff level (dDDH 70%; ANI 95–96%) for species delineation. The polyphasic characteristics indicated that the strain W1-6^T represents a novel species of the genus Simplicispira, for which the name Simplicispira sedimenti sp. nov. is proposed. The type strain is W1-6^T (= CGMCC 1.16274^T = NBRC 115624^T).