hi SCRIPTION OF SPECIES OF STREPTOMYCES 



201 



Figure 37. Sporophores of S. tliastalicus, X 4,500, showing 

 tesy of E. Baldacci. University of Milan, Italy). 



whole surface i < low 



spreading. Aerial mycelium gray. Ready hy- 

 drolysis. 



Cellulose: Good growth. 



[nvertase: Negative. 



Nitrate reduction: Weak. 



Production of 1 1 jS : Negative. 



Temperature: Optimum 37°C. 



Antagonistic properties: Limited. 



Habitat : Soil. 



Remarks: This species was redescrihed by 

 Duche ( L934) under the name .1. roseodiasta- 

 tlCUS. Baldacci et al. (1955) raised this spe- 

 cies to the status of a "series." Several new 

 species or varieties were created: A. virido- 

 diastaticus, A. diastaticus var. ardesicicus, A. 

 diastaticus var. venezuelae, A. rubrocyano- 

 diastaticus var. impiger and var. piger. 



Type culture: [MRU 3315. 



66. Streptomyces diastatochromogi nes 



(Krainsky, 1!I14; Waksman and Curtis, 

 L916) Waksman and Henrici, L948 (Krain- 

 sky, A. Centr. Bakteriol. Parasitenk. Abt. 

 II., 41: 683, L914). 



Morphology: According to Waksman and 

 Curtis (1916), sporophores are straight. Ac- 

 cording to .Jensen (1930), sinist rorse spirals 

 are produced. Spores spherical or oval, L.2 m- 



Sucrose nitrate agar: Growth colorless. 

 later yellowish-brown. Aerial mycelium 

 abundant, white, later ash-gray. Soluble 

 pigment yellowish to light brown. 



Sucrose malate agar: According to Krain- 

 sky, growth colorless, with gray aerial myce- 

 lium. When glucose is added, center of aerial 

 mycelium is colored yellowish, with gray 

 margin. 



GllK 



•ose-asparagiue agai 



dor- 



less, with gray aerial mycelium. 



Nutrient agar: Aerial mycelium white to 

 gray. Soluble pigment brownish to coffee- 

 brown. Melanin-positive. 



Potato: Growth light gray, later grayish- 

 black. Aerial mycelium white to gray. Solu- 

 ble pigment black. 



Gelatin: Growth cream-colored to yellow- 

 ish-brown. Aerial mycelium -cant white. Sol- 



