Streptomyces fuscichromogenes sp. nov., an actinomycete from soil

A novel actinomycete, designated strain m16^T, was isolated from a soil sample collected from the tropical rain forest of Xishuangbanna, a prefecture in Yunnan Province, south-west China, and characterized by using polyphasic taxomomy. Cells were aerobic and Gram-reaction-positive, and spore chains were observed to be of the helical type, with elliptical spores and smooth spore surfaces. The novel strain grew over a temperature range of 15–35^ºC, at pH 5.0–11.0 and in the presence of 0–3 % (w/v) NaCl. The DNA G+C content of strain m16^T was 70.0 mol%. The main fatty acids were iso-C_16:0 (29.3%), iso-C_15:0 (15.4 %) and anteiso-C_15:0 (14.6 %), and the predominant menaquinones were MK-9(H₆), MK-9(H₈) and MK-9(H₄). Comparative 16S rRNA gene sequence analysis showed that strain m16^T was most closely related to Streptomyces jiujiangensis KCTC 29262^T (98.7 %), Streptomyces panaciradicis KACC 17632^T (98.7 %), Streptomyces rhizophilus NBRC 108885^T (98.5 %), Streptomyces shenzhenensis DSM 42034^T (98.4 %), Streptomyces graminisoli JR-19^T (98.4 %) and Streptomyces gramineus JR-43^T (98.3 %). Phylogenetic, chemotaxonomic and phenotypic analyses indicated that strain m16^T represents a novel species within the genus Streptomyces, for which the name Streptomyces fuscichromogenes is proposed. The type strain is m16^T (=CGMCC 4.7110^T=KCTC 29195^T).