DESCRIPTION OF SPECIES OF STREPTOMYCES 



L'ST 



Certain other forms belonging to this 

 group have been described, such as .1 . griseus 

 variabilis and A. griseus zonatus of Krassil- 

 nikov (1949), .1. badius and A. malachiticus 

 of Gause et al. (1957). Krassilnikov also 

 listed viridis sterilis as a strain that lost the 

 capacity to produce aerial mycelium. 



Millard and Burr (1926) described, under 

 A. viridis, an organism thai produces dark 

 to black growth on sucrose-nitrate agar, 

 with a mouse-gray aerial mycelium, gradu- 

 ally becoming black. On nutrient agar, 

 growth is at first colorless, gradually becom- 

 ing gray; aerial mycelium gray to mouse- 

 gray. On gelatin, it produces a thin colorless 

 growth and a faint brownish pigment; rapid 

 liquefaction. 



Duche ( 1934) described an organism under 

 the name .4. viridis; he later changed this 

 name to .1. baarnensis. This organism was 

 isolated as a contaminant of cultures of S. 

 albus and S. lavendulae. 



Type culture: [MRU 3372 (strain of 

 Millard and Burr). 



246. Streptomyces viridochromogenes (Kra- 

 insky, L914) Waksman and Henrici, L948 

 (Krainsky, A. Centr. Bakteriol. Parasitenk. 



Abt. II., II: 684 lis;,, Mil l,. 



Morphology: Sporophores monopodially 

 branched, with numerous open or compact, 

 sinistrorse spirals, :; to 5 M in diameter, oc- 

 curring as side branches. Spores short, oval 

 or spherical, 1.25 to 1.5 n (Figs. 49-51); sur- 

 face covered with long spines (PI. II k). 



Sucrose nitrate agar: Growth cream-col- 

 ored with dark center, becoming dark green; 

 reverse yellowish to light cadmium. Aerial 

 mycelium white, becoming light green to 

 light blue. 



Glucose-asparagine agar: Growth abund- 

 ant, spreading, wrinkled, gray, becoming- 

 black. Aerial mycelium appeal's late; white, 

 later becoming green to light blue. 



Nutrient agar: Growth restricted, gray, 

 with greenish tinge. Xo aerial mycelium. 

 Soluble pigment brown. 



Potato: Growth abundant, gray-brown. 



Figure 49. Chains of spores of S. viridochromogenes, grown for 10 days on glucose asparagine-CaCh 

 agar, X 13,500 (Reproduced from: Lechevalier, H. A. and Tikhonienko, A. S. Mikrobiologiya 2<>: 13 :.n 

 1960). 



