FAMILY III. STREPTOMYCETACEAE 



811 



Ann. Appl. Biol., 13, 1926, 601; Waksman, 

 in Waksman and Lechevalier, Actinomj'- 

 cetes and Their Antibiotics, Baltimore, 

 1953, 112.) 



mar.gi.na'tus. L. part. adj. marginntus 

 margined. 



Aerial mycelium: Abundant, gray to 

 yellow to olive-buff. Sporophores simple. 

 Spores spherical, 0.8 by 0.87 micron. 



Gelatin: Thin, pale olive-gray growth 

 covered with abundant, pale gray to olive- 

 buff aerial mycelium. Soluble buff pigment. 



Synthetic sucrose agar: Thin, echinate 

 growth covered with abundant, olive-buff 

 aerial mycelium. Cream-colored pigment. 



Synthetic glucose agar: Thin, yellowish 

 growth covered with white to buff aerial 

 mycelium. Soluble buff pigment. 



Potato agar: Heavy, gray growth covered 

 with white to whitish yellow aerial myce- 

 lium. Soluble, light, golden brown to deep 

 golden brown pigment. 



Glycerol synthetic solution: Flaky growth 

 at base and on surface. Aerial mycelium 

 scant, olive-buff. 



Glucose broth: White, spongy mass at 

 surface and on bottom, covered with white 

 to yellow aerial mycelium. Soluble, light 

 golden brown pigment. 



Milk: Good, flocculated growth. Aerial 

 mycelium white. Coagulation followed by 

 peptonization. 



Potato: Good, raised growth covered 

 with abundant, buff to olive-buff aerial 

 mycelium. Plug at first gray, later becom- 

 ing black. 



Starch is hydrolyzed. 



Tyrosina.se reaction: Negative. 



Nitrites produced from nitrates. 



Grows well at 37.5° C. 



Source : Isolated from a small, unruptured 

 potato scab. 



Habitat : Potato so far as known. 



132. Streptomyces salnionicolor (Mil- 

 lard and Burr, 1926) Waksman, 1953. (Ac- 

 tinomyces salnionicolor Millard and Burr, 

 Ann. Appl. Biol., 13, 1926, 601; Waksman, 

 in Waksman and Lechevalier, Actinomy- 

 cetes and Their Antibiotics, Baltimore, 

 1953, 113.) 



sal.mo.ni'co.lor. L. mas.n. salmo salmon; 



L. gen. noun salmonis of a salmon; L. fem.n. 

 color color; M.L. adj. salnionicolor salmon- 

 colored. 



Vegetative growth: Hyphae minute. 



Aerial mycelium: Poorly developed or 

 absent entirely. Sporophores straight or 

 form open spirals. Spores spherical or ellip- 

 soidal, 0.4 to 0.8 by 0.5 to 0.8 micron. 



Gelatin: Poor growth. Slow liquefaction. 



Synthetic sucrose agar: Minute, gray to 

 pinkish colonies. No aerial mycelium. No 

 soluble pigment. 



Synthetic glucose agar: Gray to purplish 

 growth. No aerial mycelium. Faint, golden 

 soluble pigment. 



Potato agar: Wrinkled, pinkish growth. 



Glycerol synthetic solution: Poor, flaky 

 growth at bottom of tube. 



Glucose broth: Growth in form of sponge- 

 like mass. 



Milk: Fair surface growth. Coagulated; 

 slowly peptonized. 



Potato: Restricted, wrinkled, raised, 

 ocher-red to brown growth. Plug pigmented 

 drab-gray. 



Starch is hydrolyzed. 



Tyrosinase reaction: Negative. 



Nitrites produced from nitrates. 



Grows well at 37.5° C. 



Source: Isolated from sour soil. 



Habitat: Soil. 



133. Streptomyces maculatus (Millard 

 and Burr, 1926) Waksman, 1953. (Actino- 

 myces maculatus Millard and Burr, Ann. 

 Appl. Biol., IS, 1926, 601; Waksman, in 

 Waksman and Lechevalier, Actinomycetes 

 and Their Antibiotics, Baltimore, 1953, 113.) 



ma.cu.la'tus. L. part. adj. maculatus 

 spotted. 



Vegetative growth: Dark green. Hyphae 

 extremely fine. 



Aerial mycelium: Poorly developed; only 

 on certain media as a fine gray cover. 

 Sporophores short, straight. Spores spheri- 

 cal, 0.5 to 0.6 micron. Chlamydospores 

 produced. 



Gelatin: Poor growth. Slow liquefaction. 



Synthetic sucrose agar: Round, flat, 

 pale gray to pinkish colonies, later showing 

 dark green centers. No aerial mycelium. 



