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  • Title: Pseudomonas guangdongensis sp. nov., isolated from an electroactive biofilm, and emended description of the genus Pseudomonas Migula 1894.
    Author: Yang G, Han L, Wen J, Zhou S.
    Journal: Int J Syst Evol Microbiol; 2013 Dec; 63(Pt 12):4599-4605. PubMed ID: 23918787.
    Abstract:
    A Gram-negative, straight to slightly curved rod-shaped bacterium, motile with peritrichous flagella, designated SgZ-6(T), was isolated from an electroactive biofilm and was characterized by means of a polyphasic approach. Growth occurred with 0-5.0 % (w/v) NaCl (optimum 1 %), at pH 6.0-10.0 (optimum pH 7.0) and at 10-42 °C (optimum 30 °C) in trypticase soya broth. Phylogenetic analyses based on the 16S rRNA and gyrB genes identified the isolate as a member of a novel species of the genus Pseudomonas. Strain SgZ-6(T) exhibited the highest 16S rRNA gene sequence similarity to 'Pseudomonas linyingensis' CGMCC 1.10701 (97.5 %), followed by Pseudomonas sagittaria JCM 18195(T) (97.4 %), P. oleovorans subsp. lubricantis DSM 21016(T) (96.6 %), P. tuomuerensis JCM 14085(T) (96.5 %) and P. alcaliphila JCM 10630(T) (96.4 %). Strain SgZ-6(T) showed the highest gyrB gene sequence similarity of 93.7 % to 'P. linyingensis' CGMCC 1.10701 among all type strains of genus Pseudomonas. DNA-DNA pairing studies showed that strain SgZ-6(T) displayed 47.1 and 40.3 % relatedness to 'P. linyingensis' CGMCC 1.10701 and P. sagittaria JCM 18195(T), respectively. The major isoprenoid quinone was ubiquinone 9 (Q-9). The whole-cell fatty acids consisted mainly of summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c), C16 : 0 and summed feature 8 (C18 : 1ω6c and/or C18 : 1ω7c). The DNA G+C content of the genomic DNA was 68.1 mol%. On the basis of phenotypic, chemotaxonomic and phylogenetic data, strain SgZ-6(T) is proposed to represent a novel species of the genus Pseudomonas, for which the name Pseudomonas guangdongensis sp. nov. is proposed. The type strain is SgZ-6(T) ( = CCTCC AB 2012022(T) = KACC 16606(T)). An emended description of the genus Pseudomonas is also proposed.
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