Summary
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1.
An addition of acid casein hydrolysate, supplemented with tryptophan, to a synthetic medium caused an inhibition of the growth of Marasmius perforans.
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2.
The inhibition was overcome by the addition of a mixture of B vitamins. When added separately, only pantothenic acid and pyridoxine counteracted the inhibiting effect.
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3.
Additions of individual amino acids at a concentration of 0.5mm in most cases stimulated growth, and there was no case of inhibition observed.
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4.
Several amino acids could be used as the sole nitrogen source.
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5.
When aspartic acid or glutamic acid were added as the nitrogen source, pyridoxine had a marked stimulating effect on the growth. Also in the presence of supraoptimal concentrations of tryptophan or phenylalanine, an addition of pyridoxine had a positive effect.
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6.
Thirteen freshly isolated strains of M. perforans showed a high degree of variation with respect to their sensitivity towards casein hydrolysate and pyridoxine.
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Lindeberg, G., Lindeberg, M. The effect of pyridoxine and amino acids on the growth of marasmius perforans Fr.. Archiv. Mikrobiol. 49, 86–95 (1964). https://doi.org/10.1007/BF00510543
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DOI: https://doi.org/10.1007/BF00510543