sp. nov., an algalytic bacterium isolated from seawater Free

Abstract

A novel Gram-stain-negative, yellow-pigmented, catalase- and oxidase-positive, non-endospore-forming, flagellated bacterium, designated strain Yeonmyeong 2-22, was isolated from surface seawater of Geoje Island, Republic of Korea. Strain Yeonmyeong 2-22 showed algalytic activity against the seven strains tested: , , , , , and . A taxonomic study was carried out based on a polyphasic approach to characterize the exact taxonomic position of strain Yeonmyeong 2-22. The bacterium was able to grow at 10–40 °C, at salinities from 0 to 9 %, at pH from 4.0 to 9.0 and was not able to degrade gelatin or casein. Phylogenetic analysis of 16S rRNA gene sequences revealed that strain Yeonmyeong 2-22 was considered to represent a novel species of the genus , which belongs to the family and was related most closely to DSW-74 with 97.23 % 16S rRNA gene sequence similarity. The dominant cellular fatty acids of strain Yeonmyeong 2-22 were Cω7 (49.7 %), C (12.0 %) and 11-methyl Cω7 (11.5 %), and ubiquinone-10 (Q-10) was the predominant respiratory lipoquinone. The genomic DNA G+C content of strain Yeonmyeong 2-22 was calculated to be 63.0 mol%. Phenotypic characteristics of the novel strain also differed from other members of the genus . On the basis of polyphasic taxonomic data, strain Yeonmyeong 2-22represents as a novel species of the genus , for which the name of sp. nov. is proposed. The type strain is Yeonmyeong 2-22 (=KEMB 9005-328=JCM 31499).

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2017-11-01
2024-03-29
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