Aflatoxin and fumonisin contamination of commercial corn (Zea mays) hybrids in Mississippi

Hamed K. Abbas, W. Paul Williams, Gary L. Windham, Horace C. Pringle, Weiping Xie, W. Thomas Shier

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112 Scopus citations

Abstract

Resistance to mycotoxin contamination was compared in field samples harvested from 45 commercial corn (maize) hybrids and 5 single-cross aflatoxin-resistant germplasm lines in years with high and moderate heat stress. In high heat stress, mycotoxin levels were (4.34 ± 0.32) × 103 μg/kg [(0.95-10.5 × 103 μg/kg] aflatoxins and 11.2 ± 1.2 mg/kg (0-35 mg/kg) fumonisins in commercial hybrids and 370 ± 88 μg/kg (140-609 μg/kg) aflatoxins and 4.0 ± 1.3 mg/kg (1.7-7.8 mg/kg) fumonisins in aflatoxin-resistant germplasm lines. Deoxynivalenol was detected (one-fourth of the samples, 0-1.5 mg/kg), but not zearalenone. In moderate heat stress, mycotoxin levels were 6.2 ± 1.6 μg/kg (0-30.4 μg/kg) aflatoxins and 2.5 ± 0.2 mg/kg (0.5-4.8 mg/kg) fumonisins in commercial hybrids and 1.6 ± 0.7 μg/kg (0-7 μg/kg) aflatoxins and 1.2 ± 0.2 mg/kg (0.5-3.0 mg/kg) fumonisins in aflatoxin-resistant germplasm lines. The results are consistent with heat stress playing an important role in the susceptibility of corn to both aflatoxin and fumonisin contamination, with significant reductions of both aflatoxins and fumonisins in aflatoxin-resistant germplasm lines.

Original languageEnglish (US)
Pages (from-to)5246-5254
Number of pages9
JournalJournal of agricultural and food chemistry
Volume50
Issue number18
DOIs
StatePublished - Aug 28 2002

Keywords

  • Aflatoxin
  • Aflatoxin-resistance
  • Aspergillus
  • Corn hybrids
  • Deoxynivalenol
  • Drought
  • Fumonisin
  • Fusarium
  • Heat stress
  • Maize
  • Mycotoxin
  • Zearalenone

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