FAMILY III. STREPTOMYCETACEAE 



765 



Starch is rapidly hydrolyzed. 

 No growth on cellulose. 

 Source: Isolated from mud from the edge 

 of a river. 

 Habitat: Unknown. 



27. Streptomyces griseoluteus Ume- 

 zawa et al., 1951. (Umezawa, Hayano, 

 Maeda, Ogata and Okami, Jour. Antibiotics 

 (Japanese), 4, 1951, 34; also see Okami, Jour. 

 Antibiotics (Japanese), 5, 1952, 478.) 



gri.se.o.lu'te.us. M.L. adj. griseus gray; 

 luteus golden yellow; M.L. adj. griseoluteus 

 grayish yellow. 



Aerial mycelium: Hyphae branch mono- 

 podially and irregularly; conidia ellipsoidal 

 to cylindrical, 1.0 to 1.2 by 1.8 to 2.2 mi- 

 crons. 



Gelatin : No growth. 



Agar: Wrinkled, transparent growth. 

 Aerial mj'celium thin, white, powdery. No 

 soluble pigment or a j'ellowish brown pig- 

 ment. 



Synthetic agar: Thin, colorless to cream- 

 colored growth. Margin plumose, penetrat- 

 ing into medium. Aerial mycelium powdery, 

 grayish white to light drab. No soluble pig- 

 ment or a yellowish brown pigment. 



Glucose agar: Wrinkled, cream-colored 

 growth. Aerial mycelium thin, white. Red- 

 dish brown pigment. 



Glucose broth: Cream-colored to brown 

 surface ring. Aerial mycelium powdery, 

 white. Soluble reddish brown pigment 

 weakly produced. 



Milk: Cream-colored ring; white surface 

 patches. 



Potato: Abundant, wrinkled, cream- 

 colored growth. Aerial mycelium dusty 

 white, thin; plug becoming slightly brown- 

 ish. 



Starch is hydrolyzed. 



Nitrites produced from nitrates. 



Antagonistic properties: Produces griseo- 

 lutein, a yellow antibiotic active against 

 Gram-positive and Gram-negative bacteria. 



Source: Isolated from the soil of a potato 

 field in Tokyo. 



Habitat: Soil. 



28. Streptomyces bobiliae (Waksman 

 and Curtis, 1916) Waksman and Henrici, 

 1948. (Actinomyces bobili Waksman and Cur- 

 tis, Soil Sci., /, 1916, 121; Waksman and 

 Henrici, in Manual, 6th ed., 1948, 937.) 



bo.bi'li.ae. M.L. gen. noun bobiliae of 

 Bobili; named for Bobili, a person's nick- 

 name. 



Aerial mycelium: Few close spirals of a 

 de.xtrorse type. 



Gelatin: Dense, cream-colored to brown- 

 ish surface growth. Rapid liquefaction. 



Agar: Restricted, glossy, gray growth be- 

 coming brownish. 



Synthetic agar: Abundant, glossy wrin- 

 kled, elevated, coral-red growth becoming 

 deep red. Aerial mycelium scant, white. 



Starch agar: Restricted, finely wrinkled, 

 coral-red growth with hyaline margin. 



Glucose broth: Round colonies in fluid; 

 flaky sediment. 



Milk: Dark brown ring; not coagulated; 

 peptonized. 



Potato: Thin, yellowish growth becoming 

 red, dry and wrinkled. 



Starch is hydrolyzed. 



Nitrites produced from nitrates. 



Soluble brown pigment formed. 



Aerobic. 



Optimum temperature, 37° C. 



Antagonistic properties: Positive. 



Source: Isolated once from adobe and 

 from garden soils. 



Habitat: Soil. 



29. Streptomyces aiirantiacus (Rossi- 

 Doria, 1891, emend. Krassilnikov, 1941) 

 Waksman, 1953. (Streptotrix (sic) aurantiaca 

 Rossi-Doria, Ann. Inst. d'Ig. sper. d. Univ. 

 di Roma, 1, 1891, 417; Actinomyces aurantia- 

 cus Gasperini, Ann. Inst. d'Ig. sper. d. Univ. 

 di Roma, 2, 1892, 222; Krassilnikov, Guide 

 to the Actinomycetes, Izd. Akad. Nauk, 

 U.S.S.R., Moskau, 1941, 36; Waksman, in 

 Waksman and Lechevalier, Actinomj'^cetes 

 and Their Antibiotics, Baltimore, 1953, 53.) 



au.ran.ti'a.cus. L. neut.n. aurum gold; 

 M.L. neut.n. Aurantium generic name of 

 the orange; M.L. adj. mirantiacus orange- 

 colored. 



Vegetative growth: Lichenoid, dry, com- 

 pact, bright orange or golden color which 

 does not change on continued incubation. 

 Pigment insoluble in medium but soluble in 

 organic solvents. Produces an abundance of 

 chlamydospores. 



Aerial mycelium: Poorly developed or 

 completely absent on many media; non- 

 septate. Sporophores form spirals with 3 to 



