1887

Abstract

An aerobic Gram-stain-negative prosthecate bacterium, designated RMAR8-3, was isolated from a marine red alga Rhodosorus marinus in the Republic of Korea. Cells were dimorphic rods with a single polar prostheca (non-motile) or flagellum (motile) showing catalase- and oxidase-positive reactions. Growth of strain RMAR8-3 was observed at 15–45 °C (optimum, 40 °C), at pH 6.0–9.0 (optimum, pH 7.0) and in the presence of 0–10 % (w/v) NaCl (optimum, 2 %). Ubiquinone-10 was detected as the sole isoprenoid quinone and C18 : 0, summed feature 8 (comprising C18 : 1  ω7c and/or C18 : 1ω6c), C17 : 0, C12 : 0 3-OH and C16 : 0 were identified as the major cellular fatty acids. The major polar lipids were sulfo-quinovosyldiacylglycerol, glucuronopyranosyldiglyceride and monoglycosyldiglyceride. The G+C content of the genomic DNA was 66.3 mol%. Strain RMAR8-3 was most closely related to Marinicauda pacifica P-1 km-3 with a 97.6 % 16S rRNA gene sequence similarity. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain RMAR8-3 formed a tight phylogenic lineage with M. pacifica P-1 km-3 within the family Hyphomonadaceae . On the basis of phenotypic, chemotaxonomic and molecular features, strain RMAR8-3 clearly represents a novel species of the genus Marinicauda , for which the name Marinicauda algicola sp. nov. is proposed. The type strain is RMAR8-3 (=KACC 18990=JCM 31718).

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/content/journal/ijsem/10.1099/ijsem.0.002129
2017-08-22
2019-10-23
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