SPECIES OF STREPTOMYCES 93 



95. Streptomyces lipmanii (Waksman and Curtis) Waksman and 

 Henrici. (Waksman, S. A., and Curtis, R. E., Soil ScL, 1, 1916, 123.) 



Aerial mycelium: Mycelium and hyphae straight, branching. Conidia 

 oval, 0.8-1.1 by 1.0-1.5 /a. 



Synthetic agar: Growth abundant, raised, colorless, becoming light brown 

 and wrinkled. Aerial mycelium white, turning gray. 



Nutrient agar: Growth radiately wrinkled, glossy, yellow. 



Glucose agar: Growth irregular, spreading, light yellow. 



Potato: Growth abundant, wrinkled, cream-colored. 



Gelatin: Liquefaction, with cream-colored, flaky sediment. 



Milk: Ring cream-colored; coagulation; peptonization with alkaline reac- 

 tion. 



Starch: Growth transparent, becoming dark with age. Hydrolysis posi- 

 tive. 



Glucose broth: Ring white, with abundant, colorless, flaky sediment. 



Nitrate: Reduction to nitrite. 



Temperature: Optimum 25°C. 



Antagonistic properties: Good, though some strains show no activity. 



Remarks : The pigment formed is not soluble. 



96. Streptomyces hygroscopicus (Jensen) Waksman and Henrici. 

 (Jensen, H. L., Proc. Linnean Soc. N. S. Wales, 56, 1931, 359.) 



Vegetative growth: Hyphae 0.6-0.8 ju in diameter. 



Aerial mycelium: Hyphae long, tangled, branched, 0.8-1 .0/* in diameter. 

 Spirals numerous, sinistrorse, narrow, usually short, only 1 or 2 turns, 

 closed, typically situated as dense clusters on the main stems of the aerial 

 hyphae. Spores oval, 0.8-1.0 by 1.0-1.2 /x. 



Synthetic agar: Growth good, folded, glossy surface; white to cream- 

 colored, later sulfur-yellow to yellowish gray, with golden to light orange 

 reverse. Soluble pigment of the same color. Aerial mycelium scant, thin, 

 white, or absent. 



Nutrient agar: Growth good, raised, wrinkled, glossy, cream-colored; 

 later yellowish gray with yellowish brown reverse. Occasionally, a scant 

 white aerial mycelium. 



Glucose agar: Growth good; granulated, cream-colored to straw-yellow, 

 later dull chrome-yellow to brownish orange. Aerial mycelium thin, smooth, 

 dusty, white to pale yellowish gray; later interspersed with small, moist, 

 dark violet-gray to brownish patches which gradually spread over the whole 

 surface. Soluble pigment light yellow. 



Km*? 



LIBRARY I 



