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A filamentous actinomycete, designated strain D65T, was isolated from a root of a wild tree, Alnus nepalensis D. Don (Nepalese Alder), collected in Xishuangbanna, China. It produced the bioactive agents daidzein and N-acetyltyramine and had morphological and chemical properties characteristic of streptomycetes. Pink to brownish red diffusible pigments were produced on several ISP media. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain D65T formed a distinct phyletic line that was most closely, albeit loosely, associated with Streptomyces hebeiensis YIM 001T, Streptomyces aurantiogriseus NRRL B-5416T, Streptomyces griseoviridis NBRC 12874T, Streptomyces niveoruber NBRC 15428T and Streptomyces thermovulgaris NBRC 13473. A number of phenotypic properties allowed differentiation of the strain from related Streptomyces species. Therefore strain D65T represents a novel species of the genus Streptomyces, for which the name Streptomyces alni sp. nov. is proposed. The type strain is D65T (=CGMCC 4.3510T=NRRL B-24611T).
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International Journal of Systematic and Evolutionary Microbiology vol. 59 , part 2, pp. 254 - 258
Supplementary Figure S1. Scanning electron micrographs showing spore chains and spore-surface ornamentation of cells of strain D65 T( Streptomyces alni sp. nov.) grown on ISP 2 agar. [PDF](55 KB)