Influence of storage environment on maize grain: CO2 production, dry matter losses and aflatoxins contamination

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dc.contributor.authorGarcia-Cela, Esther
dc.contributor.authorKiaitsi, Elisavet
dc.contributor.authorSulyok, M.
dc.contributor.authorKrska, R.
dc.contributor.authorMedina-Vayá, Ángel
dc.contributor.authorPetit Damico, I.
dc.contributor.authorMagan, Naresh
dc.date.accessioned2019-03-15T11:04:53Z
dc.date.available2019-03-15T11:04:53Z
dc.date.issued2019-01-14
dc.description.abstractPoor storage of cereals, such as maize can lead to both nutritional losses and mycotoxin contamination. The aim of this study was to examine the respiration of maize either naturally contaminated or inoculated with Aspergillus flavus to examine whether this might be an early and sensitive indicator of aflatoxin (AF) contamination and relative storability risk. We thus examined the relationship between different interacting storage environmental conditions (0.80–0.99 water activity (aw) and 15–35°C) in naturally contaminated and irradiated maize grain + A. flavus on relative respiration rates (R), dry matter losses (DMLs) and aflatoxin B1 and B2 (AFB1-B2) contamination. Temporal respiration and total CO2 production were analysed by GC-TCD, and results used to calculate the DMLs due to colonisation. AFs contamination was quantified at the end of the storage period by HPLC MS/MS. The highest respiration rates occurred at 0.95 aw and 30–35°C representing between 0.5% and 18% DMLs. Optimum AFs contamination was at the same aw at 30°C. Highest AFs contamination occurred in maize colonised only by A. flavus. A significant positive correlation between % DMLs and AFB1 contamination was obtained (r = 0.866, p < 0.001) in the irradiated maize treatments inoculated with A. flavus. In naturally contaminated maize + A. flavus inoculum loss of only 0.56% DML resulted in AFB1 contamination levels exceeding the EU legislative limits for food. This suggests that there is a very low threshold tolerance during storage of maize to minimise AFB1 contamination. This data can be used to develop models that can be effectively used in enhancing management for storage of maize to minimise risks of mycotoxin contamination.en_UK
dc.identifier.citationGarcia-Cela E, Kiaitsi E, Sulyok M, et al., Influence of storage environment on maize grain: CO2 production, dry matter losses and aflatoxins contamination. Food Additives and Contaminants: Part A: Chemistry, Analysis, Control, Exposure and Risk Assessment, Volume 36, Issue 1, 2019, pp. 175-185en_UK
dc.identifier.issn1944-0049
dc.identifier.urihttps://doi.org/10.1080/19440049.2018.1556403
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/13993
dc.language.isoenen_UK
dc.publisherTaylor and Francisen_UK
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectCerealsen_UK
dc.subjectcornen_UK
dc.subjecttemperatureen_UK
dc.subjectwater activityen_UK
dc.subjectAspergillus flavusen_UK
dc.subjectmycotoxinsen_UK
dc.subjectcarbon dioxideen_UK
dc.subjectsilosen_UK
dc.titleInfluence of storage environment on maize grain: CO2 production, dry matter losses and aflatoxins contaminationen_UK
dc.typeArticleen_UK

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