Abstract
Thirty-nineAspergillus flavus genotypes (DNA fingerprinting) isolated from corn grown in a field near Kilbourne, Illinois were evaluated for their sensitivity to β-carotene (50 μg/ml) inhibition of aflatoxin B1 biosynthesis. Inhibition of aflatoxin was greater than 90% for 28 of the genotypes and >70% for 38 of the 39 genotypes. FiveA. flavus strains (4 fingerprint groups) isolated from molded raw peanuts, NRRL 3239, NRRL 3357, NRRL 6514, NRRL 6515 and NRRL 13135, produced greater quantities of aflatoxin than all 39 genotypes isolated from corn, and were less sensitive to β-carotene inhibition.Aspergillus flavus NRRL 3357 is commonly used as inoculum in variety trials for aflatoxin resistance. Isolate identity and sensitivity to potential inhibitors in corn can be critical in assessing corn resistance to aflatoxin.
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Wicklow, D.T., Norton, R.A. & McAlpin, C.E. β-Carotene inhibition of aflatoxin biosynthesis amongAspergillus flavus genotypes from Illinois corn. Mycoscience 39, 167–172 (1998). https://doi.org/10.1007/BF02464055
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DOI: https://doi.org/10.1007/BF02464055