SPECIES OF STREPTOMYCES 113 



Glycerol synthetic solution : Flaky growth at base and on surface. Aerial 

 mycelium scant, olive-buff. 

 Tyrosinase reaction: Negative. 

 Temperature: Grows well at 37.5°C. 

 Habitat: Potato scab. 



129. Streptomyces salmonicolor (Millard and Burr) comb. nov. (Mil- 

 lard, W. A., and Burr, S., Ann. Appl. Biol., 13, 1926, 580.) 



Vegetative growth : Hyphae minute. 



Aerial mycelium: Poorly developed or absent entirely. Sporophores 

 straight or form open spirals. Spores spherical or oval, 0.5-0.8 by 0.4-0.8 n. 



Synthetic sucrose agar: Colonies minute, gray to pinkish. No aerial 

 mycelium. No soluble pigment. 



Synthetic glucose agar: Growth gray to purplish. No aerial mycelium. 

 Soluble pigment faint golden. 



Nutrient potato agar: Growth wrinkled, pinkish. 



Potato: Growth restricted, wrinkled, raised, ocher-red to brown. Plug 

 pigmented drab-gray. 



Gelatin: Growth poor; liquefaction slow. 



Milk: Surface growth fair. Coagulation; peptonization slow. 



Starch: Hydrolysis. 



Glucose broth: Growth in form of sponge-like mass. 



Nitrate: Reduction. 



Glycerol synthetic solution : Poor flaky growth at bottom of tube. 



Tyrosinase reaction: Negative. 



Temperature: Grows well at 37.5°C. 



130. Streptomyces maculatus (Millard and Burr) comb. nov. (Millard, 

 W. A., and Burr, S., Ann. Appl. Biol., 13, 1926, 580.) 



Vegetative growth: Dark green; hyphae extremely fine. 



Aerial mycelium: Poorly developed, only on certain media as a fine gray 

 cover. Sporophores short, straight. Spores spherical, 0.5-0.6 y.. Chlamydo- 

 spores produced. 



Synthetic sucrose agar: Colonies round, flat, pale gray to pinkish, later 

 showing dark green centers. No aerial mycelium. 



Synthetic glucose agar: Growth thin, flat, almost black, with greenish 

 tinge. 



Nutrient potato agar: Growth vinaceous-tawny-colored, producing a 

 vinaceous-tawny soluble pigment. 



Potato: Growth restricted, raised, pinkish. Aerial mycelium scant, white. 

 Soluble pigment gray to brown. 



Gelatin: Growth poor; liquefaction slow. 



