. The actinomycetes. Actinomycetales. $ t t * j pi. Figure 34. Sporophores of S. ralvus (Reproduced from: Backus, E. J. et al. Antibiotics & Chemo- therapy 7: 530, 1957). Antagonistic properties: Weak. Habitat: Soil. Remarks: Certain varieties of this species have also been described. This is true, for example, of A. fasciculus, which Krassilni- kov himself considered as a variety of S. candid'us; it is also true of .4. farinosus Krassilnikov and of .4. candidus var. albo- roseus described by Gause et al. (1957). S. nitrosporeus Okami (1952) appears to be closely related, if not identical
. The actinomycetes. Actinomycetales. $ t t * j pi. Figure 34. Sporophores of S. ralvus (Reproduced from: Backus, E. J. et al. Antibiotics & Chemo- therapy 7: 530, 1957). Antagonistic properties: Weak. Habitat: Soil. Remarks: Certain varieties of this species have also been described. This is true, for example, of A. fasciculus, which Krassilni- kov himself considered as a variety of S. candid'us; it is also true of .4. farinosus Krassilnikov and of .4. candidus var. albo- roseus described by Gause et al. (1957). S. nitrosporeus Okami (1952) appears to be closely related, if not identical to it. Ett- lrnger et al. (1958) consider this organism as related to S. griseus. Type culture: [MRU 3416. 42. Streptomyces rum sens Hickey et al., L952 (Hickey, U. J., Coram, C. J., Hidy, P. H., Cohen, I. R., Nager, U. F. B., and Kropp, E. Antibiotics & Chemotherapy 2:472-483, 1952). Morphology: Sporophores straight or curved, not forming any spirals. Spores globose, to by to n (Fig. 35). Calcium malate agar: Growth gray to rose-gray; reverse yellow to tan. No soluble pigment. Yeast extract-casein digest agar: Growth effuse to convex, edge filamentous; reverse brown. Aerial mycelium powdery, varying from gray-white to gray. No soluble pig- ment. Acid-glucose-peptone agar: Growth at first white, then tan. Aerial mycelium faintly. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Waksman, Selman A. (Selman Abraham), 1888-1973. Baltimore, Williams & Wilkins
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