Growth and biosynthesis of aflatoxin by Aspergillus parasiticus in cultures containing nisin |
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Authors: | Ahmed E Yousef Shaker M El-Gendy and Elmer H Marth |
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Affiliation: | (1) Department of Food Science and the Food Research Institute, University of Wisconsin-Madison, 53706 Madison, Wisconsin, USA |
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Abstract: | Summary Nisin, 200 or 5000 Reading units/ml, was added toAspergillus parasiticus cultures. The cultures were incubated at 28 °C for 3, 7 or 10 days and analyzed for mycelial dry weight, pH and accumulation of aflatoxin B1 and G1. During the first 3 days of incubation, dry weight, pH decrease and aflatoxin accumulation were suppressed by nisin, when compared with similar values for the nisin-free control. After longer incubation, differences in dry weight and pH values decreased, whereas accumulation of aflatoxin in the nisin-containing cultures surpassed that of the control.
Wachstum und Aflatoxin-Biosynthese von Aspergillus parasiticus in Nisin-enthaltenden Kulturen Zusammenfassung Nisin (200 oder 5000 Reading-Einheiten/ml) wurdeAspergillus parasiticus Kulturen zugegeben. Die Kulturen wurden bei 28 °C für 3, 7 oder 10 Tage bebrütet und auf Mycel-Trockengewicht, pH und Aflatoxin-Inhalt geprüft. Während der ersten drei Tage wurden das Wachstum und die Aflatoxin-Biosynthese durch Nisin etwas gehemmt, nach längere Incubation jedoch gefördert. |
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