Dl SCRIPTION OF SPECIES OF STREPTOMYCES 



219 



Milk: Questionable coagulation; good 

 peptonizal ion. 

 Starch: Hydrolysis. 

 Cellulose: ( rood growth. 

 Sucrose: No inversion. 

 Production of IPS: Positive. 

 Antagonistic properties: No activity. 

 Habitat : Soil, food product-, potatoes. 



Type culture: [MRU 3736. 



104. Streptomyces gougeroti (Duche, 1934) 

 Waksman and Henrici, L948 (Duche, J. Les 

 actinomyces du groupe albus. 1'. Lechevalier, 

 Paris, L934). 



Morphology: Aerial hyphae short , gnarled. 

 Spores oval. 



Glucose nitrate agar: Growth slow as 

 punctiform colonies; cream-colored with 

 smooth edge. Xo aerial mycelium. No soluble 

 pigment. 



Glucose-asparagine agar: Growth colorless 

 to yellowish. Aerial mycelium thin, white. 

 Xo soluble pigment. 



Nutrienl agar: Growth cream-colored 

 with brownish reverse. Aerial mycelium 

 thin, white. Soluble pigment faint yellowish. 



Potato: Growth slow, greenish tinged. 

 Aerial mycelium thin, white. Xo soluble pig- 

 ment . 



Gelatin: Surface growth heavy, cream- 

 colored. Aerial mycelium thin, white. Lique- 

 faction strong. Melanin-negative. 



Milk: Growth cream-colored. Aerial my- 

 celium thin, white. Peptonization rapid. 



( Joagulated serum: ( rrowth cream-colored. 

 Aerial mycelium white. Liquefaction rapid. 



Starch: Hydrolysis rapid. 



Nitrate reduction: Negative. 



Production of H 2 S: Negative. 



Antagonistic properties: Active against 

 fungi. 



Remarks: This culture is believed to be 

 intermediate between N. albus, with it- 

 abundant aerial mycelium, and S. almquisti, 

 with its very scant aerial mycelium. 



Type cull lire: [MRU 3590. 



105. Streptomyces gracilis (Millard and 

 Burr, 1926) Waksman (Millard, \Y. A. and 

 Burr, S. Ann Appl Biol. L3: 580, 1926). 



Morphology: Sporophores form spirals. 

 Spores oval or spherical, 0.8 to 0.9 by 0.8 n. 



Sucrose nitrate agar: Growth fern-like, 

 pale gray. Aerial mycelium scant, gray to 

 buff. Soluble pigment cream-colored. 



Nutrienl potato agar: Growth vinaceous- 

 bul'f to dark brown or almost black. Aerial 

 mycelium gray. Soluble pigment light golden 

 brown. 



Potato: Aerial mycelium abundant, olive- 

 gray to buff. Plug pigmented light brown. 



Gelatin: Growth gray. Aerial mycelium 

 white. Liquefaction rapid. Soluble pigment 

 pink to dark golden blown. 



Milk: Surface growth good. Aerial myce- 

 lium white in the form of a ring and specks 

 on surface. Coagulation slow, followed by 

 rapid peptonization. 



Starch: Positive hydrolysis. 



Nitrate reduction: Positive. 



Tyrosinase reaction: Negative. 



Temperature: Grows well at 37.5°C. 



Habitat : Potato scab. 



106. Streptomyces griseinus Waksman 

 (Reynolds, I). M. and Waksman, S. A. 

 J. Bacterid., 55: 7:5<> 751, 1948; Okami, Y. 



J. Antibiotics (Japan) 5: '.15 «.»7, 1950). 



Morphology: Straight sporophores pro- 

 duced in clusters or tufts, without spirals. 

 Spores rod-shaped, 1.0 to 1.8 by 0.8 to 1.0 m- 



Sucrose nitrate agar: Substrate growth 

 wrinkled, reverse cream-colored to brownish. 

 Aerial mycelium white to cream-colored 

 with light greenish tinge (lesser tendency to 

 grass-green coloration, more of a cream- 

 colon. Xo soluble pigment. 



Starch agar: Colorless to cream-colored 

 growth. Aerial mycelium grayish-olive. Hy- 

 drolysis rapid. 



Potato: ( Growth wrinkled, yellowish-white. 

 Aerial mycelium grayish-white with olive 

 tinge. 



