DESCRIPTION OF SPECIES OF STREPTOMYCES 237 



Sucrose nitrate agar: Growth thin, flat, L39. Streptomyces lucensis Arcamone et al., 

 gray to yellowish-olive. Aerial mycelium L957* (Arcamone, F., Bertazzoli, ('., Cane- 

 scant, olive-colored. Soluble pigment yellow, vazzi, (>., DiMarco, A., Ghione, M., and 



Nutrient potato agar: Growth good, gray. Grein, A. Giorn. Microbiol. 1: 119 128, 



Aerial mycelium olive-buff. Soluble pigmenl 1957). 

 golden brown. Morphology: Aerial hyphae long, 



Gelatin: Growth gray. Aerial mycelium branched, and hooked at the tip. Spirals 



scant, white. Liquefaction rapid. Soluble produced abundantly, 

 pigment yellow. Glycerol-glycine agar: Growth abun- 



Milk: Surface growth excellent. Aerial dant, lemon-yellow. Aerial mycelium gray- 

 mycelium white. Coagulation and rapid pep- brown. Some soluble pigmenl produced. 

 tonization. Glucose-asparagine agar: Growth abun- 



Starch: Hydrolysis. dant. Aerial mycelium hazel-brown; scanty 



Nitrate reduction : None. clusters of white, short, sterile hyphae. No 



Temperature: Grows well at :i7."> ( '. soluble pigment. 



Habitat: Potato scab. Potato-Glucose agar: Growth abundant, 



,, /T , smooth, yellowish. Aerial mycelium abun- 



138. Streptomyces longisporoflavus (Kras- . a 



.. .. „ ,, „, , .... ., .. dant, bun-gray to hazel-brown. Soluble pig- 



silnikov, 11)4 1 ) Waksman (Krassilmkov, N. . , > 



, . . . . . , N . , ment ash-gray, later turning gray- brown. 



A. Actmomycetales. Izvest. Akad. Nauk. _. ° ■ ,.,,',, 



Yeast-glucose agar: drowth dark brown. 



SSSH, Moskau, p. 30, 1941). 



Morphology: Sporophores produce long 

 open spirals. Spores cylindrical or elongated, 



1.0 to 1..") by 0.7 /u. some rounded at ends 

 and swollen in center. 



Agar media: Growth yellow to lemon-yel- 

 low or dirty yellow, seldom golden yellow. 

 Pigment insoluble. Aerial mycelium well de- 



veloped, velvety, whitish-yellow to brow.. 



. . .. soluble pigm 



ish-vellow. ,, , 



Aei'ial mycelium whitish. Soluble pigmenl 

 dark brown. 



Starch agar: Growth abundant, colorless 

 to yellowish-brown. Aei'ial mycelium pow- 

 dery, buff-gray to light brown. No soluble 

 pigment. Moderate starch hydrolysis. 



Oatmeal agar: Growth yellowish and 

 smooth. Aerial mycelium hazel-brown. No 



Potato plug: Growth abundant, wrinkled. 



Aerial mycelium lighl gray to hazel-brown. 

 Milk: Coagulation and slow peptonization. _. J , ' , ,' , , 



. ' . , , PI1112; surface turns dark la-own around 



Gelatin: Liquefaction mediui 



Starch: Hydrolysis weak. 



Cellulose: No growth. 



Nitrate reduction : Positive. 



Sucrose: No inversion. 



Antagonistic properties: Weakly antago- 

 nistic. 



Remarks: Some strains, such as S. flavo- 

 viridis, sometimes have a greenish or green- 

 ish-yellow color instead of a yellow color. 

 .... . . . . . I ype culture: I AIKI 3783. 



1 his organism and related forms belong to 



the same group as S. griseoflavus and S. 140. Streptomyces luridus (Krassilniko\ 



microflavus. The form described by Gause l( " L - l!,: > 7 ' Waksman (Krassilnikov, N. A. 



culture. 



Gelatin: Growth abundant, blown. Aerial 

 mycelium white, turning grayish-brown. 

 Substrate is strongly darkened within 3 

 days. No liquefaction. 



Antagonistic properties: Produces an 

 antifungal antibiotic, etruscomycin, of the 

 let raene i ype. 



<t al. (1 ( .)")7) as A. aurini also belongs to this 



Koreniako, A. [., Meksina, M. M., Vale- 



group. * Supplemented by personal communicatio 



