Abstract
Fourteen samples of preharvest infected corn ears, collected in 1990-1991 from different Polish cornfields, were found to be highly infected by fusarium subglutinans. This species was recently shown to produce in culture beauvericin (BEA), a toxin mostly known for its insecticidal properties. Chemical analysis by high-performance liquid chromatography and high-performance thin-layer chromatography revealed the occurrence in the naturally infected corn samples of BEA (up to 60 mg/kg). When cultured on autoclaved corn kernels for 4 weeks at 25 degrees C 8 of the 10 assayed strains of F. subglutinans produced BEA (up to 200 mg/kg), whereas 9 strains also produced moniliformin (up to 500 mg/kg). Cultural extracts containing the highest amounts of BEA proved to be toxic in Artemia salina bioassay. The natural occurrence of BEA in corn is reported here for the first time.
Published Version
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