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  • Title: Pedobacter zeae sp. nov., an endophytic bacterium isolated from maize root.
    Author: Gao JL, Sun P, Mao XJ, Du YL, Liu BY, Sun JG.
    Journal: Int J Syst Evol Microbiol; 2017 Feb; 67(2):231-236. PubMed ID: 27902277.
    Abstract:
    A novel Gram-staining-negative, aerobic, non-motile by gliding and rod-shaped strain, designated 22T, was isolated from surface-sterilized root tissue of maize planted in the Fangshan District of Beijing, PR China. The highest levels of 16S rRNA gene sequence similarity were found with respect to Pedobacter suwonensis 15-52T (97.5 %), Pedobacter terrae DS-57T (97.1 %) and Pedobacter alluvionis NWER-II11T (97.0 %). Phylogenetic analysis based on 16S rRNA gene sequence data indicated that strain 22T is a member of the genus Pedobacter. The isolate exhibited relatively low levels of DNA-DNA relatedness with respect to P. suwonensis DSM 18130T (21.3±2.0 %), P. alluvionis DSM 19624T (38.1±1.8 %) and P. terrae DSM 17933T (17.1±1.4 %). The DNA G+C content was 41.2±0.5 mol%. The major isoprenoid quinone was menaquinone-7 (MK-7). The major component in the polyamine pattern was sym-homospermidine. The major polar lipids consisted of phosphatidylethanolamine, three unidentified aminolipids and one unidentified lipid. The major fatty acids were identified as iso-C15 : 0 and summed feature 3 (C16 : 1ω7c and/or C16 : 1ω6c). The results of the physiological and biochemical tests and minor differences in the fatty acid profiles allowed a clear phenotypic differentiation of strain 22T from the related species with high 16S rRNA gene sequence similarity, P. suwonensis DSM 18130T, P. alluvionis DSM 19624T and P. terrae DSM 17933T. Strain 22T represents a novel species within the genus Pedobacter, for which the name Pedobacter zeae sp. nov. is proposed, with the type strain 22T (=CGMCC 1.15287T=DSM 100774T).
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