University of Hertfordshire

From the same journal

By the same authors

  • E. Garcia-Cela
  • F.J. Gari Sanchez
  • M. Sulyok
  • C. Verheecke-Vaessen
  • A. Medina
  • R. Krska
  • N. Magan
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Original languageEnglish
Pages (from-to)1-7
Number of pages7
JournalFungal Biology
Volume124
Issue1
Early online date24 Oct 2019
DOIs
Publication statusPublished - Jan 2020

Abstract

Aspergillus flavus is the main xerophylic species colonising stored peanuts resulting in contamination with aflatoxins (AFs) and cyclopiazonic acid (CPA). This study evaluated the relationship between storage of shelled peanuts under interacting abiotic conditions on (a) temporal respiration (R) and cumulative CO2 production, (b) dry matter losses (DMLs) and (c) aflatoxin B1 (AFB1) and CPA accumulation. Both naturally contaminated peanuts and those inoculated with A. flavus were stored for 7-days under different water activities (aw; 0.77–0.95) and temperatures (20–35°C). There was an increase in the temporal CO2 production rates in wetter and warmer conditions, with the highest respiration at 0.95 aw + A. flavus inoculum at 30°C (2474 mg CO2kg−1h−1). The DMLs were modelled to produce contour maps of the environmental conditions resulting in maximum/minimum losses. Maximum mycotoxin contamination was always at 0.95 aw although optimal temperatures were 25-30°C for AFs and 30-35°C for CPA. These results showed a correlation between CO2 production and mycotoxin accumulation. They also provide valuable information for the creation of a database focused on the development of a post-harvest decision support system to determine the relative risks of contamination with these mycotoxins in stored shelled peanuts.

Notes

Export Date: 25 January 2020

ID: 19108981