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  • Title: Marinobacterium rhizophilum sp. nov., isolated from the rhizosphere of the coastal tidal-flat plant Suaeda japonica.
    Author: Kim YG, Jin YA, Hwang CY, Cho BC.
    Journal: Int J Syst Evol Microbiol; 2008 Jan; 58(Pt 1):164-7. PubMed ID: 18175703.
    Abstract:
    A Gram-negative, strictly aerobic, marine bacterium, designated strain CL-YJ9(T), was isolated from sediment closely associated with the roots of a plant (Suaeda japonica) inhabiting a coastal tidal flat. Cells of the novel strain were straight and rod-shaped and were motile by means of monopolar flagella. A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain CL-YJ9(T) belongs to the genus Marinobacterium and was most closely related to Marinobacterium halophilum mano11(T) (94.1% sequence similarity) and to other members of the genus Marinobacterium (92.5-93.7% sequence similarity). The strain grew with 1-5% NaCl (optimum, 3%) and at 5-30 degrees C (optimum, approx. 25 degrees C) and pH 6.0-9.0 (optimum, pH 7.0). The predominant cellular fatty acids were summed feature 3 (C(16:1)omega7c and/or iso-C(15:0) 2-OH, 40.3%), C(18:1)omega7c (26.6%), C(16:0) (16.6%) and C(10:0) 3-OH (7.1%). The major isoprenoid quinone was Q-8. The G+C content of the genomic DNA was 61 mol%. On the basis of the data from this polyphasic study, strain CL-YJ9(T) belongs to the genus Marinobacterium but is distinguishable from the recognized species. Strain CL-YJ9(T) therefore represents a novel species, for which the name Marinobacterium rhizophilum sp. nov. is proposed. The type strain is CL-YJ9(T) (=KCCM 42386(T) =DSM 18822(T)).
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