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Int J Syst Evol Microbiol 58 (2008), 1566-1570; DOI  10.1099/ijs.0.65480-0
© 2008 International Union of Microbiological Societies

Streptacidiphilus anmyonensis sp. nov., Streptacidiphilus rugosus sp. nov. and Streptacidiphilus melanogenes sp. nov., acidophilic actinobacteria isolated from Pinus soils

Sung-Heun Cho, Ji-Hye Han, Hye-Young Ko and Seung Bum Kim

Department of Microbiology, School of Bioscience and Biotechnology, Chungnam National University, 220 Gung-dong, Yuseong, Daejeon 305-764, Republic of Korea

Correspondence
Seung Bum Kim
sbk01{at}cnu.ac.kr

The taxonomic positions of 22 spore-forming, extensively branched actinobacteria isolated from Pinus soils were examined using a polyphasic approach. Analysis of the 16S rRNA gene sequences indicated that all of the isolates fell into three distinctive phylogenetic clusters within the genus Streptacidiphilus of the family Streptomycetaceae, and also that Streptacidiphilus jiangxiensis was the species closest to the three phyloclusters, with 16S rRNA gene sequence similarities ranging from 98.0 to 99.2 %. However, the low DNA–DNA relatedness values between representatives of the three clusters and S. jiangxiensis clearly differentiated them from one another. Representative isolates were also found to have chemotaxonomic features typical of the genus Streptacidiphilus and were distinguishable from all established species of Streptacidiphilus on the basis of a combination of phenotypic properties. It is evident from this study that each of the three phyloclusters should be equated with three novel Streptacidiphilus species, for which the following names are proposed: Streptacidiphilus anmyonensis sp. nov. (type strain AM11T =NBRC 103185T =KCTC 19278T), Streptacidiphilus rugosus sp. nov. (type strain AM16T =NBRC 103186T =KCTC 19279T) and Streptacidiphilus melanogenes sp. nov. (type strain SB-B34T =NBRC 103184T =KCTC 19280T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of strains AM-11T, AM-16T and SB-B34T are DQ904546, DQ904547 and DQ994689; those of other strains described in this work are given in Supplementary Fig. S1.

An extended neighbour-joining phylogenetic tree and whole-cell fatty acid profiles for strains AM-11T, AM-16T and SB-B34T and recognized Streptacidiphilus species are available as supplementary data in the online version of this paper.






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Copyright © 2008 by the International Union of Microbiological Societies.