DESCRIPTION OF SPECIES OF STREPTOM1 CBS 223 



pallid neutral gray, with yellowish tone. Maeda, K., Ogata, Y.. and Okami, V. J. 



Faint brownish soluble pigment. Antibiotics (Japan) t: 34 10, L951; Okami, 



Mfalate-glycerol agar: Growth brownish. Y. ibid. 5: 477 180 L952). 



Aerial mycelium lighl mouse-gray. Soluble Morphology: Sporophores with mono- 



pigmenl taint brownish. podial and irregular branching, flexible and 



Glucose-asparagine agar: Growth cream- hooked. Spores oval to cylindrical, L.O to 1.2 



colored, turning dark. Aerial mycelium deep by i .s to 2.2 M . 



dull gray. No soluble pigment. Sucrose nitrate agar: Growth thin, color- 



Xuirient agar: Brownish growth, with less to cream-colored. Margin plumose, pene- 



smooth surface. Aerial mycelium white with trating into medium. Aerial mycelium pow- 



gray tinge. Soluble pigmenl brown. Mela- dery, grayish-white to lighl drab. Soluble 



nin-negative. pigmenl absent or yellowish-brown. 



Potato: Growth cream-colored, becoming Glucose-asparagine agar: Growth wrin- 



black. Aerial mycelium white with greenish kled, cream-colored. Aerial mycelium thin, 



tinge. Soluble pigmenl brown to black. white. Pigmenl reddish-brown. 



Gelatin: Yellowish flaky pellicle and sedi- Nutrient agar: Growth wrinkled, trans- 

 ment. Aerial mycelium white. Gradual lique- parent. Aerial mycelium thin, white, pow- 

 taction. Paint browning of medium. dery. Soluble pigmenl absent or yellowish- 

 Milk: Growth abundant, pink pellicle, brown. 

 Slow coagulation and good peptonization. Potato: Growth abundant, wrinkled, 



Starch media: ( Irowth grayish-brown with cream-colored. Aerial mycelium dusty white, 



dark liiiu;. Aerial mycelium gray. Slight hy- thin. Plug becoming slightly brownish. 



drolysis of starch. Gelatin: No growth. 



Cellulose: Scant growth. Milk: Surface ring cream-colored. Aerial 



Invertase: Negative. mycelium in form of white patches. 



Nitrate reduction: Positive. Starch: Hydrolysis. 



Production of IPS: Negative. Nitrate reduction: Positive. 



Temperature: Optimum 25 C. Production of IPS: Negative. 



Antagonistic properties: Some strains Antagonistic properties: Produces griseo- 



show considerable activity againsl various lutein 



bacteria. Several antibiotics (phagomycin, Type culture: [MRU 3674; 3729. 

 fermicidin, anisomycin, oxytetracycline, gris- 



eomycin) were isolated from culture, de- l13 " Streptomyces griseoplanus Backus ei 



scribed as strains of S. griseolus. " l - L957 (Backus, E. J, Tresner, IP I)., and 



Habitat: Soil. Campbell, T. IP Antibiotics cV- Chemother- 



Remarks: Ettlinger et al. I L958) considered ;l P>' ": 532 541, 1957 . 



this organism a- related to S. olivaceus. Morphology: Sporophores arise as tangled 



Krassilnikov (1949) considered it a- a -train and curved and often loosely spiraled chains 



of A. candidus. Hoffmann (1958) isolated a of spores. Spore- globose to elliptical, 0.6 to 



strain of this species from potato scab. Al- 1 .1' by 1.2 to 1.5 n (Fig. 10). 



though this organism is usually described as Sucrose nitrate agar: (irowth colorless, 



melanin-negative, Krassilnikov (1941) and Aerial mycelium scant, white to gray. 



Hoffmann consider it as melanin-positive. Glucose-asparagine agar: (irowth -ray to 



Type culture: [MRU 3325. [ighi pinkish. No aerial mycelium. 



112. Streptomyces griseoluteus Dmezawa Nutrient agar: (irowth ivory-yellow. No 



et <il., L951 (Umezawa, IP, Hayano, S., aerial mycelium. Melanin-negative. 



