1887

Abstract

Four light-yellow-pigmented, Gram-negative, short-rod-shaped, non-motile isolates were obtained from enrichment culture during degradation of the thallus of the brown alga . The isolates studied were chemo-organotrophic, alkalitolerant and mesophilic. Polar lipids were analysed and phosphatidylethanolamine was the only phospholipid identified. The predominant cellular fatty acids were 15 : 0, i15 : 0, ai15 : 0, i15 : 1 and 15 : 1(n-6). The DNA G+C contents of the four strains were 34·0–34·4 mol%. The level of DNA relatedness of the four isolates was conspecific (88–98 %), indicating that they belong to the same species. The 16S rDNA sequence of strain KMM 3553 was determined. Phylogenetic analysis revealed that KMM 3553 formed a distinct phyletic line in the phylum , class in the family and that, phylogenetically, this strain could be placed almost equidistant from the genera and (16S rRNA gene sequence similarities of 94 %). On the basis of significant differences in phenotypic and chemotaxonomic characteristics, it is suggested that the isolates represent a novel species in a new genus; the name gen. nov., sp. nov. is proposed. The type strain is KMM 3553 (=CIP 107684).

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2004-05-01
2019-10-20
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