DESCRIPTION OF SPECIES OF STREPTOMYCES 209 



Malate-glycerol agar: Growth colorless to late, at first white, later gray. Soluble pig- 

 cream-colored. Aerial mycelium mouse-gray, menl brown. 



Glucose-asparagine agar: Aerial mycelium Starch agar: Growth yellow. Aerial myce- 



pale gray. Soluble pigmenl yellowish-green, lium white. Weakly diastatic. 



Nutrient agar: Growth colorless, ".listen- Potato: Growth yellow. Aerial mycelium 



ing, wrinkled. Aerial mycelium white. Solu- white. Soluble pigmenl black, 



ble pigmenl absenl or yellow. Gelatin: Colonies yellowish. Slight lique- 



Potato: Growth abundant, wrinkled, faction. Soluble pigment brown, 



cream-colored to yellow. Aerial mycelium Cellulose : Growth slow. 



white to pinkish. Soluble pigmenl absent or Nitrate reduction: Strong. 



taint brown. Tyrosinase: Positive. 



Gelatin: Growth abundant, yellowish, Temperature: Optimum 35°C. 

 spreading. Aerial mycelium white. Liquefac- Habitat: Garden soil, 

 tion rapid. Soluble pigment yellowish-brown, Remarks: Krainsky considered this cul- 

 not melanoid. ture as identical to .1. chromogenes (las- 

 Milk: Ring sulfur-yellow. Rapid coagula- perini. 

 tion and strong peptonization. Type culture: [MRU 3671. 



Starch media: Growth colorless. Aerial my- s; , Strevtomyces ilw , iqns< „, ( Duch< * 



celium hghl gray. Hydrolysis. , u;U) Waksman ( Duch 4 J. Les actinomyces 



Cellulose: Growth scant. du groupe albus. P. Lechevalier, Paris, 1934 



Invertase: Negative. 

 Nitrate reduction: Positive. 



Morphology: Sporophores long, straight, 



with a few curling tips. Spores spherical. 



Production ot IP.S: Negative. o„ ,. tl . t n ,i i- ■ i 



6 Sucrose nitrate agar: Growth hunted. 



Antagonistic properties: Some strains yellowish) reverse fcuming black Aeria] 



P roduc e actinomycm. mycelium thin, gray to mouse-gray. 



Habitat: Soil. Xutri(lllt Qrowth thi 



Remarks: Several varieties of this org aJ .. M , <im ,_ A( , na| lium thi white _ X( 



ream 



colored. Aerial mycelium thin, white. 



ism have been described. It is sumcienl to s()lul)](> pigment Melanin-negative. 



mention a culture described by Krassilmkov Glucose-peptone agar: Growth yellow; 



as .1. rectus, which appears to he a variety ,. „ ,. ♦ , u , .,,, i i \ ■ i 



' ' • reverse tending to turn dark. Aerial myce- 



of S. flaveolus. Krassilnikov also believed i- „ , ,, i '. ,, . , , A1 



•' hum abundant, mouse-gray to drab. No 



thai .1. krainskii Duche" belongs to this so i u bl e nigmenl 



lil '" ,l,) ' Starch agar: Growth very limited, similar 



Type culture: IMRU 3319. tn lh;M on sucrose nitrate agar. Hydrolysis. 



82. Streptomyces flavochromogenes (Krain- Potato: Growth abundant, lichenoid. 



sky, L914) Waksman and Henrici, 1948 Aerial mycelium abundant, mouse-gray to 



(Krainsky, A. Centr. Bakteriol. Parasitenk. drab with white edge. No soluble pigment. 



Abt. II, 11: us:,. L914 . Gelatin: Growth flocculent, through me- 



Morphology: Spores oval, 1.7 p. dium. Liquefaction slow. No soluble pig- 



Glucose-asparagine agar: Growth yellow, ment. 



Aerial mycelium gray. Soluble pigmenl Milk: Cream-colored ring. No aerial myce- 



brown. lium. Peptonization very rapid. 



Calcium malate agar: Growth yellow. Remarks: According to Ettlinger et al. 



Aerial mycelium produced late, white to (1958) this organism belongs to the S. 



gray. fradiae group. 



Nutrient agar: Aerial mycelium formed Type culture: IMRU 3322. 



