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Streptomyces stramineus sp. nov., a New Species of the Verticillate Streptomycetes

¹Microbial Properties Research, National Center for Agricultural Utilization Research, Agricultural Research Service, U.S. Department of Agriculture, Peoria, Illinois 61604
²R.R. 2, Box 2235, Morrisville, Vermont 05661
³Infectious Disease Section, Wyeth-Ayerst Research, Pearl River, New York 10965

^* Corresponding author. Mailing address: National Center for Agricultural Utilization Research, 1815 North University Street, Peoria, IL 61604.

ABSTRACT

Strain NRRL 12292^T, which produces the bleomycin-like antibiotics LL-BO1208 and LL-BO1208β forms umbels consisting of chains of smooth-surface ovoid spores that are borne on verticils on the aerial mycelia, indicating that it is a member of the verticillate group of the genus Streptomyces formerly classified in the genus Streptoverticillium. This strain was compared morphologically and physiologically to 54 other verticillate Streptomyces strains. The levels of DNA relatedness between strain NRRL 12292^Tand 34 other verticillate Streptomyces strains, including strains representing at least 19 genetic species clusters, were also determined. Strain NRRL 12292^Tis morphologically and physiologically distinct from the other verticillate strains studied, particularly because of the straw yellow color of its aerial mycelia and spore mass. DNA hybridization data support the uniqueness of this strain, since the levels of DNA relatedness between NRRL 12292^Tand the other verticillate strains used in this study were low. Our data support designation of a new species, Streptomyces stramineus, whose type strain is NRRL 12292.

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