Production of aflatoxin and its partition between the medium and the mycelium of Aspergillus parasiticus during incubation under various conditions.

Zeitschrift Für Lebensmittel-Untersuchung Und -Forschung
C N Shih, E H Marth

Abstract

Spores of an aflatoxigenic strain of Aspergillus parasiticus were inoculated into a glucose-salts medium which was incubated with and without shaking at 28 degrees C for 15 days. Without shaking, maximal production of total aflatoxin and aflatoxins B1, G1, and G2 occurred at 5 days, whereas the maximal amount of B2 appeared after 7 days. Initially approximately 5% of the total toxins appeared in the mycelium but this increased to more than 60% after 5 days. Shaking of cultures during incubation served to reduce production of total aflatoxin and of each of the individual toxins. The maximal amount of total aflatoxin and of toxins B1 and G1 appeared in shaken cultures after 5 days, whereas 8 and 11 days were needed to obtain maximal amounts of B2 and G2, respectively. The mycelium of shaken cultures initially retained approximately 50% of the total aflatoxin and this increased to about 80% as the incubation progressed. Very little aflatoxin was synthesized at 35 and 45 degrees C and production of total aflatoxin and of each individual toxin was less at 15 degrees C than at 25 or 28 degrees C. When the medium contained 0.5 to 50% glucose, maximal amounts of total aflatoxin and of aflatoxins B1, G1 and G2 appeared in the presence o...Continue Reading

References

Feb 1, 1971·Journal of General Microbiology·S R GuptaT A Venkitasubramanian

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Citations

Sep 1, 1995·Mycotoxin Research·M E GarciaG Suarez
Feb 5, 2008·Applied Microbiology and Biotechnology·Robert A HolmesGary A Payne
Apr 1, 1988·Zeitschrift Für Lebensmittel-Untersuchung Und -Forschung·J L BlancoG Suárez

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