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  • Title: Description of Hymenobacter arizonensis sp. nov. from the southwestern arid lands of the United States of America.
    Author: Reddy GS, Garcia-Pichel F.
    Journal: Antonie Van Leeuwenhoek; 2013 Feb; 103(2):321-30. PubMed ID: 22987249.
    Abstract:
    Strain OR362-8(T) was isolated from a biological soil crust sample collected from the southwestern arid lands of the United States of America, using BG11-PGY medium. Cells of OR362-8(T) were found to be rod shaped; occur singly, as pairs and in groups; non-motile; positive for catalase, oxidase, phosphatase and gelatinase; hydrolyze starch; contain iso-C(15:0), anteiso-C(15:0), iso-C(15:1)G, C(16:1ω5c) and summed feature 3 (C(16:1(ω7c))/iso-C(15:0) 2OH as defined by the MIDI system) as the major fatty acids; and MK-7 as the sole respiratory quinone. A BLAST sequence similarity search using 16S rRNA gene sequence of OR362-8(T) identified Hymenobacter as the nearest genus with a similarity of 90.4-96.9 %. The phylogenetic analyses based on the phenetic methods UPGMA, NJ, ME and DNA parsimony resulted in the clustering of OR362-8(T) with Clade 1 Hymenobacter species represented by Hymenobacter glaciei, Hymenobacter antarcticus, Hymenobacter flocculans, Hymenobacter metalli and Hymenobacter soli with the closest being the Hymenobacter glaciei (96.9 % 16S rRNA gene sequence similarity). Besides the strong phylogentic affiliation, OR362-8(T) also exhibited significant phenotypic and chemotaxonomic differences with the members of Clade 1 Hymenobacter spp. More importantly, the DNA G+C content (mol%) of OR362-8(T) is very high (70 %) compared to the nearest species identified by phylogenetic analysis. Based on the phylogenetic, phenotypic and chemotaxonomic characteristics, OR362-8(T) was assigned to a novel species for which we propose here the name Hymenobacter arizonensis sp. nov., with OR362-8(T) (=ATCC BAA 1266(T) = DSM 17860(T) = JCM 13504(T)) as the type strain.
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