1887

Abstract

A Gram-stain-negative, rod-shaped bacterium, designated Ar-125, was isolated from Antarctic seawater. It produced carotenoid-like pigments and did not produce Bchl . Ar-125 was positive for hydrolysis of DNA, aesculin, gelatin, starch, Tween 40 and Tween 60. The sole respiratory quinone was MK-6. The major polar lipids were phosphatidylethanolamine, one unidentified aminolipid, one unidentified glycolipid and two unidentified lipids. The principal fatty acids were branched-chain fatty acids, including iso-Ciso-C G, summed feature 3 (iso-C 2-OH and/or Cω7), iso-C iso-C 3-OH, iso-C 3-OH and iso-C 3-OH, as well as C. The genomic DNA G+C content was 31.8 mol%. On the basis of 16S rRNA gene sequence analysis, Ar-125 is closely related to the species of the genera (with 16S rRNA gene pairwise sequence similarity of 93.7–96.5 %), (94.3–95.8 %), (94.2–95.7 %), (95.5 %), (93.3–95.4 %), (95.3 %) and (94.8–95.3 %), of the family . Phylogenetic analysis indicated that it represented an independent lineage and that the closest relatives were members of the genus . Differential phenotypic properties and chemotaxonomic differences, together with phylogenetic distinctiveness, revealed that Ar-125 could be differentiated from members of closely related genera. Therefore, it is proposed that Ar-125 represents a novel species in a new genus, for which the name gen. nov., sp. nov. (type strain Ar-125 =CGMCC 1.15295=JCM 30876) is proposed.

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2016-07-01
2022-01-20
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