1887

Abstract

Two actinomycete strains, designated N7-3 and N4-6, were isolated from a natural cave on Jeju Island, Republic of Korea, by using a dilution method, and were subjected to physiological, chemical and molecular characterization. The nearly complete sequences of the 16S rRNA gene were aligned and compared with those of representatives of the genus . Phylogenetic analysis showed that the organisms belong to the family and formed two distinct lineages within the evolutionary radius of the genus . The chemotaxonomic and morphological properties support their classification in the genus . The 16S rRNA gene sequence data revealed that the closest relatives of strains N7-3 and N4-6 were (97·9 % similarity) and (98·7 % similarity), respectively. The combination of physiological and genetic data supported the observation that the organisms could be distinguished from each other and from established species of the genus . The names sp. nov. and sp. nov. are proposed for the two novel species, with N7-3 (=NRRL B-24427=JCM 13280) and N4-6 (=NRRL B-24428=JCM 13279) as the respective type strains.

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2006-03-01
2024-12-13
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