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  • Title: Sphingobacterium wenxiniae sp. nov., a cypermethrin-degrading species from activated sludge.
    Author: Zhang J, Zheng JW, Cho BC, Hwang CY, Fang C, He J, Li SP.
    Journal: Int J Syst Evol Microbiol; 2012 Mar; 62(Pt 3):683-687. PubMed ID: 21551333.
    Abstract:
    A Gram-negative, non-motile, non-spore-forming, non-flagellated rod capable of degrading cypermethrin, designated LQY-18(T), was isolated from activated sludge of a wastewater treatment plant in China. Strain LQY-18(T) grew at 8-40 °C (optimum 30 °C), at pH 5.0-10.0 (optimum pH 7.0) and with 0-5% (w/v) NaCl (optimum 1%). The predominant menaquinone was MK-7 (97%) and the major fatty acids were summed feature 3 (comprising C(16:1)ω6c and/or C(16:1)ω7c), iso-C(15:0) and iso-C(17:0) 3-OH. The DNA G+C content was 40.3 mol%. Phylogenetic analysis revealed that the isolate belonged to the genus Sphingobacterium of the phylum Bacteroidetes and showed low 16S rRNA gene sequence similarity with recognized members of the genus Sphingobacterium. The closest neighbour was Sphingobacterium mizutaii ATCC 33299(T) (92.9% 16S rRNA gene sequence similarity). On the basis of phenotypic, genetic and phylogenetic data, strain LQY-18(T) (=ACCC 05410(T)=CCTCC AB 2010005(T)=KCTC 23009(T)) should be classified as a representative of a novel species of the genus Sphingobacterium, for which the name Sphingobacterium wenxiniae sp. nov. is proposed.
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