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  • Title: Sphingomonas flavalba sp. nov., isolated from a procymidone-contaminated soil.
    Author: Zhou XY, Zhang L, Su XJ, Hang P, Hu B, Jiang JD.
    Journal: Int J Syst Evol Microbiol; 2019 Sep; 69(9):2936-2941. PubMed ID: 31310195.
    Abstract:
    A novel Gram-stain-negative, strictly aerobic, non-spore-forming, motile with one polar flagellum and short rod-shaped bacterium, designated strain ZLT-5T, was isolated from procymidone-contaminated soil sampled in Nanjing, Jiangsu, PR China. Growth occurred at 26-37 °C (optimum, 37 °C), at pH 6.0-9.0 (pH 7.0) and in the presence of 0-1.5 % NaCl (0.5 %). Phylogenetic analysis based on the 16S rRNA gene sequences showed that strain ZLT-5T belonged to the genus Sphingomonas, with the highest sequence similarity to Sphingomonas kyeonggiensis THG-DT81T (96.6 %), followed by Sphingomonas dokdonensis DSM 21029T (96.5 %) and Sphingomonas silvisoli RP18T (96.3 %). The G+C content of strain ZLT-5T was 68.0 mol% (draft genome sequence). The average nucleotide identity value of the draft genomes between strain ZLT-5T and S. kyeonggiensis THG-DT81T was 75.4 %. Strain ZLT-5T contained ubiquinone-10 as the predominant isoprenoid quinone and sym-homospermidine as the major polyamine. The major polar lipids consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phosphatidylcholine, phosphoaminolipid and sphingoglycolipid. The main cellular fatty acids (>10 % of the total fatty acids) of strain ZLT-5T were C17 : 1ω6c, summed feature 3 (C16 : 1ω7c and/or C15 : 0 ISO 2-OH) and summed feature 8 (C18 : 1ω7c and/or C18 : 1ω6c). Based on phylogenetic analysis and physiological and biochemical characterization, strain ZLT-5T is described as a novel species of the genus Sphingomonas, for which the name Sphingomonas flavalba sp. nov. is proposed. The type strain is ZLT-5T (=CCTCC AB 2018188T=KCTC 62840T).
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