FAMILY III. STREPTOMYCETACEAE 



813 



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

 myces sampsonii Millard and Burr, Ann. 

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

 Waksman and Lechevalier, Actinomycetes 

 and Their Antibiotics, Baltimore, 1953, 115.) 



samp.so'ni.i. M.L. gen. noun sampsonii 

 of Sampson; named for a person, Sampson. 



Original description supplemented by 

 observations made bj^ Waksman and Gor- 

 don. 



Aerial mycelium: Long branching aerial 

 hyphae. Spores cylindrical, 0.5 by 0.8 to 

 1.0 micron. Spores ellipsoidal to spherical 

 (Waksman and Gordon). 



Gelatin: Scant, gray surface growth. A 

 trace of whitish aerial mycelium. Rapid 

 liquefaction. 



Synthetic sucrose agar: Good, wrinkled, 

 pale gray to white growth. Aerial mycelium 

 very scant, white. Soluble, green to buff 

 pigment. 



Synthetic glucose agar: Good, wrinkled, 

 white to gray growth. Aerial mycelium 

 scant, white. Soluble, yellow to brownish 

 pigment. 



Glycerol synthetic solution: No growth. 



Glucose broth: Good surface and bottom 

 growth as well as many colonies clinging to 

 side of tube. Aerial mycelium white. 



Milk: Good, whitish surface growth. No 

 aerial mycelium. Not coagulated; not pep- 

 tonized. Rapid peptonization (Waksman 

 and Gordon). 



Potato: Wrinkled, grayish growth. Aerial 

 mj^celium white. Soluble, golden brown 

 pigment. None observed (Waksman and 

 Gordon). 



Starch is not hydrolyzed. Starch is rap- 

 idly hjdrolyzed (Waksman and Gordon). 



Tyrosinase reaction: Negative. 



Nitrites produced from nitrates. 



Optimum temperature, 28° C. 



Source: Isolated from a medium-sized, 

 ruptured potato scab. 



Habitat: Unknown. 



137. Slreploniyces inlerinediiis (Krii- 

 ger, 1890, emend. Wollenweber, 1920) Waks- 

 man, 1953. (Oospora intermedia Kriiger, 

 Berichte der Versuchsstat. f. Zuckerrohrs, 

 Kergok-Legal, 1890; Actinomyces inter - 

 medius Wollenweber, Arb. d. Forschungs- 



inst. fiir Kartoffelbau, 1920, 16; Waksman, 

 in Waksman and Lechevalier, Actinomy- 

 cetes and Their Antibiotics, Baltimore, 

 1953, 116.) 



in.ter.me'di.us. L. adj. intermedius in- 

 termediate. 



Vegetative growth: Green-colored colo- 

 nies. Soluble green pigment. On continued 

 cultivation, green color tends to become 

 cream-colored to brownish. 



Aerial mycelium: Light gray to gray. 

 Sporophores straight, frequently arranged 

 in clumps. Spores elongated, 0.7 by 0.9 to 

 1.0 micron. 



Gelatin: Thin, colorless to faintly brown 

 growth, dropping to bottom. No soluble 

 pigment. Slow liquefaction. 



Agar: Much-folded, cream-colored 

 growth. Aerial mycelium in upper portion 

 of slant white. Soluble, faintly golden pig- 

 ment. 



Synthetic agar: Slightly folded, cream- 

 colored to brown growth. Aerial mycelium 

 thin, white. 



Starch agar: Same as on synthetic agar. 



Glucose agar: Good, brownish growth. 

 Aerial mycelium heavy, cream-colored. 

 No soluble pigment. 



Broth: Thin, colorless film dropping to 

 bottom. No aerial mycelium. No soluble 

 pigment. 



Milk: Heavy, cream-colored surface 

 growth. No aerial mycelium. Not coagu- 

 lated; slowly peptonized. 



Potato: Folded, brown growth. Trace of 

 white aerial mycelium in upper, drier por- 

 tions of growth. No soluble pigment. 



Sucrose slowly inverted. 



Starch is actively hydrolyzed. 



Nitrites weakly produced from nitrates. 



Antagonistic properties: Positive. 



Source: Isolated from the soil of potato 

 fields near Berlin. 



Habitat: Soil. 



138. Streptomyces iponioeae (Person 

 and Martin, 1940) Waksman and Henrici, 

 1948. {Actinomyces ipomoea (sic) Person 

 and Martin, Phytopath., SO, 1940, 313; 

 Waksman and Henrici, in Manual, 6th ed., 

 1948, 958.) 



i.po.moe'ae. ML. noun. Ipomoea generic 



