Types of Variation in Actinomycetes

Duggar, B. M.; Backus, E. J.; Campbell, T. H.

doi:10.1111/j.1749-6632.1954.tb39999.x

Cited by 16 publications

(2 citation statements)

References 14 publications

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“…2 The trade-mark of American Cyanamid Company for the antibiotic chlortetracycline is Aureomycin. biological activity and are produced simultaneously by the same organism are illustrated by spinulosin, fumigatin, and gliotoxin (Menzel et al, 1944); actidione, grisein, and streptomycin (Waksman et al, 1948;Whiffen, 1948); rimocidin and oxytetracycline (Davisson et al, 1951); fradicin and neomycin (Waksman, 1953); chlortetracycline and an antifungal compound (Duggar et al, 1954); and fungicidin and an actidione-like antibiotic (Hazen and Brown, 1951).…”

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Production of Tetracycline by Streptomyces aureofaciens in Synthetic Media

Darken¹,

Berenson²,

Shirk³

et al. 1960

Applied Microbiology

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mentioning

confidence: 99%

Production of Tetracycline by Streptomyces aureofaciens in Synthetic Media

Darken¹,

Berenson²,

Shirk³

et al. 1960

Applied Microbiology

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“…LITERATURE CITED BACKUS, E. J., B. M. DUGGAR, AND T. H. CAMP- BELL. 1954 Table Discussion on Actinomycetes, 7th…”

Section: Resultsmentioning

confidence: 99%

Constancy of Characteristics in the Streptomycetes

Sánchez-Marroquín¹

1962

J Bacteriol

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A total of 150 Streptomyces strains isolated from soil was studied during a 3-year period in regard to constancy and variation of the following characteristics: sporophore micromorphology, color of the aerial and substrate mycelium, surface configuration of the spores, assimilation of carbon compounds, production of H2S and melanoid pigment, and reduction of nitrates. A remarkable constancy in the following characteristics was found: (i) sporophore micromorphology When only three of the seven morphological series of Pridham et al. were developed on tomato paste-oatmeal agar or yeast extract-malt extract agar; (ii) color of the aerial mycelium if only four fundamental colors are distinguished (white to cream or buff shades; yellow to orange or brown; pink to cinnamon, red or pinkish tan to lavender; and green to gray or blue); (iii) surface configuration of the spores divided in two types (smooth and warty to spinous or hairy); (iv) assimilation of five carbon compounds (arabinose, xylose, rhamnose, raffinose, and mannitol); (v) production of H2S on Difco peptone-iron agar supplemented with 0.1 % Difco yeast extract; and (vi) production of melanoid pigment on peptone agar, giving similar results to those of the H2S test. Color of the substrate mycelium, size and shape of the spores, and reduction of nitrates should be used only as complementary data in the species descriptions, owing to their inconsistency and unreliability. Various cooperative studies of taxonomic problems in the genus Streptomyces have been undertaken. Among them are those of the First International Cooperative Work on criteria

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