Fusarium graminearum in Stored Wheat: Use of CO₂ Production to Quantify Dry Matter Losses and Relate This to Relative Risks of Zearalenone Contamination under Interacting Environmental Conditions

Toxins
Esther Garcia-CelaNaresh Magan

Abstract

Zearalenone (ZEN) contamination from Fusarium graminearum colonization is particularly important in food and feed wheat, especially during post-harvest storage with legislative limits for both food and feed grain. Indicators of the relative risk from exceeding these limits would be useful. We examined the effect of different water activities (aw; 0.95-0.90) and temperature (10-25 °C) in naturally contaminated and irradiated wheat grain, both inoculated with F. graminearum and stored for 15 days on (a) respiration rate; (b) dry matter losses (DML); (c) ZEN production and (d) relationship between DML and ZEN contamination relative to the EU legislative limits. Gas Chromatography was used to measure the temporal respiration rates and the total accumulated CO₂ production. There was an increase in temporal CO₂ production rates in wetter and warmer conditions in all treatments, with the highest respiration in the 25 °C × 0.95 aw treatments + F. graminearum inoculation. This was reflected in the total accumulated CO₂ in the treatments. The maximum DMLs were in the 0.95 aw/20-25 °C treatments and at 10 °C/0.95 aw. The DMLs were modelled to produce contour maps of the environmental conditions resulting in maximum/minimum losses. Contami...Continue Reading

References

Apr 1, 1996·International Journal of Food Microbiology·M JiménezE Hernández
Aug 26, 1998·International Journal of Food Microbiology·G BreslerV Fernandez Pinto
Sep 4, 2007·International Journal of Food Microbiology·Naresh Magan, David Aldred
Jul 24, 2008·Dose-response : a Publication of International Hormesis Society·Jaap C Hanekamp, Edward J Calabrese
May 11, 2010·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Naresh MaganRonald J W Lambert
Aug 17, 2010·International Journal of Food Microbiology·Meri KokkonenMarika Jestoi
Apr 13, 2012·Food Additives & Contaminants. Part A, Chemistry, Analysis, Control, Exposure & Risk Assessment·Kalliopi MylonaNaresh Magan

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Citations

Jan 22, 2019·Journal of the Science of Food and Agriculture·Jelena KruljMarija Bodroža-Solarov
Aug 19, 2021·Journal of the Science of Food and Agriculture·Volnei L MeneghettiLuiz C Gutkoski

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