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  • Title: Roseitalea porphyridii gen. nov., sp. nov., isolated from a red alga, and reclassification of Hoeflea suaedae Chung et al. 2013 as Pseudohoeflea suaedae gen. nov., comb. nov.
    Author: Hyeon JW, Jeong SE, Baek K, Jeon CO.
    Journal: Int J Syst Evol Microbiol; 2017 Feb; 67(2):362-368. PubMed ID: 27902230.
    Abstract:
    A Gram-staining-negative, strictly aerobic bacterial strain, designated MA7-20T, was isolated from a marine alga, Porphyridium marinum, in Korea. Cells showing oxidase-positive and catalase-positive activities were motile rods with bipolar flagella. Growth of strain MA7-20T was observed at 15-45 °C (optimum, 30-37 °C), at pH 6.0-10.5 (optimum, pH 7.0-8.0) and in the presence of 0-7 % (w/v) NaCl (optimum, 2-3 %). Strain MA7-20T contained summed feature 8 (comprising C18 : 1ω7c/C18 : 1ω6c), 11-methyl C18 : 1ω7c and C18 : 0 as the major fatty acids and ubiquinone-10 as the sole isoprenoid quinone. The major polar lipids were phosphatidylcholine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylethanolamine and phosphatidyl-N-methylethanolamine. The G+C content of the genomic DNA was 61.5 mol%. Strain MA7-20T was most closely related to Hoeflea suaedae YC6898T, Oricola cellulosilytica CC-AMH-0T and Nitratireductor basaltis J3T with 96.0, 95.8 and 95.8 % 16S rRNA gene sequence similarities, respectively, but the strain formed a distinct phylogenetic lineage from them within the family Phyllobacteriaceae with a low bootstrap value. H. suaedae also formed a clearly distinct phylogenetic lineage from other members of the genus Hoeflea and closely related genera. On the basis of phenotypic, chemotaxonomic and molecular properties, strain MA7-20T represents a novel species of a new genus of the family Phyllobacteriaceae, for which the name Roseitalea porphyridii gen. nov., sp. nov. is proposed. The type strain is MA7-20T (=KACC 18807T=JCM 31538T). In addition, H. suaedae is also reclassified as Pseudohoeflea suaedae gen. nov., comb. nov. (type strain YC6898T=KACC 14911T=NBRC 107700T).
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