1887

Abstract

A Gram-stain-negative, strictly aerobic and moderately halophilic bacterium, designated strain MA-7-27, was isolated from a marine red alga, Porphyridium marinum, in the Republic of Korea. The cells of strain MA-7-27 were non-motile rods showing oxidase- and catalase-positive activities. Growth of strain MA-7-27 was observed at 15–45 °C (optimum, 30 °C), pH 5.0–9.0 (pH 7.0) and in the presence of 0.0–5.0 % (w/v) NaCl (2.0 %). Strain MA-7-27 contained C10 : 0, summed feature 1 (comprising iso-C15 : 1 h and/or C13 : 1 3-OH) and summed feature 8 (comprising C18 : 1  ω7c and/or C18 : 1  ω6c) as the major fatty acids. The only isoprenoid quinone detected was ubiquinone-10. The major polar lipids of strain MA-7-27 were phosphatidylglycerol, two unidentified phospholipids and two unidentified aminolipids. The G+C content of the genomic DNA was approximately 63.6 mol%. Strain MA-7-27 was most closely related to the type strains of Boseongicola aestuarii BS-W15 and Nioella nitratireducens SSW136 with 96.98 % and 96.12 % 16S rRNA gene sequence similarities, respectively, but phylogenetic analyses showed that strain MA-7-27 formed a clearly distinct phylogenic lineage from the closely related strains. The phenotypic, chemotaxonomic and molecular properties support that strain MA-7-27 represents a novel genus of the family Rhodobacteraceae , for which the name Rhodophyticola porphyridii gen. nov., sp. nov. is proposed. The type strain is MA-7-27 (=KACC 18805=JCM 31537).

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2019-04-01
2019-08-19
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