DESCRIPTION OF SPECIES OF STREPTOMYCES 



IT.') 



(Leben, ('., Stessel, G. J., Keitt, G. W. 

 Mycologia 11: L59 169, L952). 



Morphology: Sporophores with spirals 

 situated typically in dense groups. Spirals 

 lend to be open, becoming closed and com- 

 pact prior to the formation of spores. Spores 

 «»val, 0.6 to L.3 by 0.7 to 2.0 n. 



Sucrose nitrate agar: Substrate growth 

 at first white, later gray. Aerial mycelium 

 abundant, light neutral gray. No soluble 

 pigmenl . 



Glycerol malate agar: Aerial mycelium 

 abundant, lighl neutral gray. Soluble pig- 

 menl taint green. 



Nutrient peptone agar: Growth shiny, 

 cream-colored. Aerial mycelium moderate, 

 pebbly, white. No soluble pigment. Melanin- 

 uegative. 



Potato-glucose agar: Aerial mycelium 

 abundant, neutral gray. Soluble pigment 

 faint, brown. 



Yeast extract agar: Aerial mycelium 

 abundant, neutral gray. No soluble pigment. 



Starch agar: Aerial mycelium abundant, 

 white to neutral gray. No soluble pigment. 

 Diastatic action weak to moderate. 



Potato: Growth finely wrinkled, cream- 

 colored. Aerial mycelium sparse. Plug dark- 

 ened slightly. 



Gelatin: Growth translucent, cream- 

 colored. Aerial mycelium sparse, white. 

 Liquefaction slight at 15 days, moderate 

 at 30 days. No soluble pigment. 



Milk: King cream-colored. Coagulation; 

 peptonization in 15 to 30 days. Yellowish- 

 orange pigmentation. 



Nitrate reduction: Slight. 



Antagonistic properties: Produces an anti- 

 fungal agent, helixin. 



21. Streptomyces <ir<n<n Grundy, L954 

 (Grundy, W. E. Brit. Pat. 71<),2:;o, Dec l, 

 1<)54*). 



Morphology: Monopodia] branching of 

 mycelium. Sporophores terminate in tight 

 spirals. Spores spherical to oval. 



■ Supplemented by personal communication. 



Sucrose nitrate agar: Growth wrinkled, 

 yellow, turning dark orange-brown with age. 

 Aerial mycelium grayish-white. Soluble pig- 

 ment light yellow-brown. 



Calcium malate agar: Growth cream- 

 colored, turning bright reddish-brown with 

 age. Aerial mycelium fluffy, cream-colored 

 turning gray with pink tinge. Soluble pig- 

 ment light pink. Complete dissolution of the 

 calcium malate. 



Glucose-asparagine agar: Growth sparse, 



golden brown; a few tufts of white aerial 

 mycelium. Soluble pigment yellow. 



Nutrient agar: Growth moderate, golden 

 brown. Aerial mycelium gray-white, -pore- 

 turning darker gray. Soluble pigment light 

 brown. 



Potato: Growth abundant, golden brown, 

 turning dark brown. Aerial mycelium fluffy, 

 becoming on sporulation dark gray. Potato 

 dark gray, turning black. 



Gelatin: Heavy gray pellicle on surface. 

 Liquefaction slow. Soluble pigment deep red- 

 brown diffusing through the liquefied zone. 

 Medium liquefaction. 



Milk: Heavy pellicle. Milk digested in 2.") 

 to 28 days with formation of curd just before 

 complete digestion. Soluble pigmenl dark 

 brown, turning black in MO days. 



Starch: Hydrolysis slow. 



Nitrate: No reduction. 



Carbon utilization: Good growth with 

 xylose, glucose, mannose, galactose, lactose, 

 maltose, sucrose, starch, mannitol, glycerol 

 sodium acetate, sodium citrate, and potas- 

 sium sodium tartrate. Sorbitol and calcium 

 lactate not utilized. 



Antagonistic properties: Produce- an anti- 

 biotic active upon Mycobacterium tuberculo- 

 sis. 



Habitat : Illinois soil. 



22. Streptomyces argenteolus Perlman, 

 L957 (Perlman, D. I'. S. Patent 2.7<) , .>.7<>:>. 

 October 7, 1958 . 



Morphology: Aerial mycelium hyaline, 

 generally branched, not forming loop- or 



