DESCRIPTION OF SPECIES OF STREPTOMYCES 



261 



194. Streptomyces praefecundus (Millard 

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

 and Burr, S. Ann. Appl. Biol. L3: 580, L926). 



Morphology: Sporophores straight, fre- 

 quently forming brushes. Spores spherical 

 to oval, 0.8 by 0.85 p. 



Sucrose aitrate agar: ( Jrowth good, cream- 

 colored. Aerial mycelium cottony, olive- 

 buff. Soluble pigment cream-colored. 



Nutrient potato agar: Growth lichenoid, 

 gray. Aerial mycelium smooth, white to 

 yellowish. Soluble pigment golden brown. 



Potato: Growth good, wrinkled. Aerial 

 mycelium white to yellowish to olive-buff. 

 Soluble pigment gray to brown. 



Gelatin: Surface growth good. Aerial my- 

 celium white. Soluble pigment light pink to 

 dark golden brown. Liquefaction rapid. 



Milk: Surface growth good. Aerial myce- 

 lium scant, white. Coagulation and peptoni- 

 zation. 



Starch: Hydrolysis. 



Nitrate reduction: Positive. 



Temperature: Grows well at 37.5°C. 



Habitat : Potato .-cab and soil. 



195. Streptomyces pra&inophilus Ettlinger 

 et a/., L958 (Ettlinger, L., Corbaz, R., and 

 Hutter, R. Arch. Mikrobiol. 31: 345, L958). 



Morphology: Sporophores monopodia I ly 

 branched, long, straight, with open spirals, 

 usually I to 3 coils. Spores covered with 

 long, fine hair (PI. II, K). 



Glycerol nitrate agar: Growth red or red- 

 brown. Aerial mycelium leek-green with 

 white spots. Soluble pigment pink. 



Glucose-asparagine agar: Growth brick- 

 red. Aerial mycelium white to leek-green. 

 Soluble pigment brick-red. 



Glycerol malate agar: Growth brick-red. 

 Aerial mycelium leek-green. Soluble pig- 

 ment pink. 



( rlucose-peptone agar: Growth brick-red. 



Starch-KN( b agar: Growth pink. Aerial 

 mycelium white to leek-green. Soluble pig- 

 ment light pink. Good hydrolysis. 



Gelatin: Bottom hakes red to yellowish, 



later brick-red. Slow liquefaction. No soluble 

 pigment . .Melanin-negat ive. 



Potato: Growth slow, flesh-red. No solu- 

 ble pigment. 



Milk: Strong coagulation and peptoniza- 

 tion. 



Antagonistic properties: Weak activity 

 against gram-positive bacteria. 



Habitat: Soil in Mallorca, Spain. 



196. Streptomyces prasinus Ettlinger et "/., 

 1958 (Ettlinger, L., Corbaz, P., and Hutter, 

 R. Arch. Mikrobiol. 31:343, 1958). 



Morphology: Sporophores monopodia I ly 

 blanched, long, straight, with open spirals, 

 forming 1 to 2 coils. Spores covered with 

 short spines (PI. II, K). 



Glycerol nitrate agar: Growth colorless. 

 Aerial mycelium grass-green, later dark 

 green. 



Glucose-asparagine agar: Growth whitish- 

 yellow. 



Glycerol malate agar: Growth copper-red. 

 Aerial mycelium velvety, leek-green. 



Gelatin: Growth limited, whitish-yellow. 

 No soluble pigment. Liquefaction positive. 



Starch agar: Growth reddish-brown. 

 Aerial mycelium leek-green. Strong hy- 

 drolysis. 



Potato: Growth limited, light brown. 

 Aerial mycelium leek-green. Melanin-nega- 

 tive. 



Milk: Heavy pellicle. Aerial mycelium 

 whitish-gray to greenish-gray. No coagula- 

 tion ; slow peptonization. 



Antagonistic properties: None. 



Habitat: Soils in Mallorca and Belgian 

 Congo. 



I!»7. Streptomyces pseudogriseolus Okami 

 et al., 1955 (Okami, Y., [Jtahara, P.. Oyagi, 

 II., Nakamura, S., and Umezawa, II. .1. 

 Antibiotics (.Japan) 8A: 126-131, L955). 



Morphology: Sporophores produce nu- 

 merous closed spirals. Spores oval to cylin- 

 drical, 0.8 to 1.2 by 1.0 t«, 1.5 fj.. 



Glycerol nitrate agar: Growth colorless to 



