DESCRIPTION OF SPECIES OF STREPTOMYCES 



277 



> gas from adonito 

 dextrin, dextros' 

 se, maltose, maim 

 imnose, salich 



Prodi 



am 



■t al. 



Cellulose: No growth. 



Carbon utilization: Xi 

 arabinose, cellobiose, 

 galactose, lactose, levulose, 



sucrose, or xylose. 



Antagonistic properties: 

 biotic novobiocin. 



Habitat: Soil. 



Remarks: According to 

 (1958), this organism is related if not identi- 

 cal to S. griseoflavus. 



228. Streptomyces spiralis (Millard and 

 Burr, 1926) Waksman (Millard, W. A. and 

 Burr, S. Ann. Appl. Biol. 13: 580, L926). 



Morphology: Sporophores straight or 

 spiral-shaped. Spores cylindrical, 1.0 to 1.7 

 by 0.9 m (Fig. 46). 



Sucrose nitrate agar: Growth rough or 

 granular, yellowish-golden. Aerial mycelium 

 vinaceous-buff to dark grayish-olive. Soluble 

 pigment pale vinaceous to fawn-colored. 



Potato: Growth poor, wrinkled, grayish- 

 vinaceous. Aerial mycelium white to grayish- 

 vinaceous. Plug colored brown around and 

 below growth. 



Gelatin: Growth limited, gray. Aerial my- 

 celium scant, white. Liquefaction rapid. 

 Melanin-negative. 



Milk: Surface growth good. Aerial myce- 

 lium abundant, white. Coagulation and 

 rapid peptonization. 



Starch: No hydrolysis. 



Nitrate reduction: None. 



Tyrosinase reaction: Negative. 



Habitat : Potato scab. 



Remarks: Krassilnikov (1949) considered 

 this organism as belonging to the A. scabies 

 group. 



229. Streptomyces spiroverticillatus Shin- 

 obu, 1958 (Shinobu, R. Botan. Mag. Tokyo 

 71:87-93, L958). 



Morphology: Verticil formation usually 

 occurs near base of aerial mycelium, but 

 generally not so remarkable as in the other 



Figure 46. Sporophores of S. spiralis, showing 

 that not all arc transformed into spun-, x 8,000 

 (Courtesy of E. Baldacci, University of Milan. 

 Italy). 



verticil-forming species. Occasionally, very 



few tufts on the skirt of the colony. Nitella 

 type verticils, generally primary only, seldom 

 secondary. About 2 to 4 short radial 

 branches. On synthetic media, many spirals 

 in form of curled tips with 1 to2 turns, seldom 

 .") turns; diameter of spirals about 5 to 8 n; 

 sometimes snail-like and hook-like curls, 

 ly loose or closed spirals with 2 to 



o, 



iona 

 3 verticil t 

 somewhat 

 (Fig. 47). 



urns, sinistrorse. Spores spheroid, 

 ellipsoid; about 0.8 n in length 



nil rate agar: ( 



th colorless t. 



