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A novel actinomycete, strain S10T, was isolated from rhizosphere soil of wild Vitis vinifera in Thinghir, Ouarzazate Province, Southern Morocco. The taxonomic status of this strain was established using a polyphasic approach. Strain S10T had white–grey aerial mycelium with long, spiral spore chains bearing smooth surfaced spores and produced a yellow diffusible pigment. Chemotaxonomic analyses showed that the cell wall of strain S10T contained ll-diaminopimelic acid and glycine. Phylogenetic analysis based on the almost complete 16S rRNA gene sequence indicated that strain S10T belonged to the Group I streptomycetes, branching off next to Streptomyces marokkonensis LMG 23016T from the Streptomyces violaceoruber group. DNA–DNA relatedness and phenotypic data distinguished strain S10T from the phylogenetically closest related type strains. It is therefore proposed that strain S10T (=CCMM B35T=DSM 41919T) represents the type strain of a novel species of the genus Streptomyces, for which the name Streptomyces thinghirensis sp. nov. is proposed.
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