Three-dimensional study of F. graminearum colonisation of stored wheat: post-harvest growth patterns, dry matter losses and mycotoxin contamination

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dc.contributor.authorPortell, Xavier
dc.contributor.authorVerheecke-Vaessen, Carol
dc.contributor.authorTorrelles-Ràfales, Rosa
dc.contributor.authorMedina, Angel
dc.contributor.authorOtten, Wilfred
dc.contributor.authorMagan, Naresh
dc.contributor.authorGarcía-Cela, Esther
dc.date.accessioned2020-08-06T13:53:40Z
dc.date.available2020-08-06T13:53:40Z
dc.date.issued2020-08-01
dc.description.abstractFusarium causes significant post-harvest quality losses and mycotoxin contamination in stored wheat but the colonisation dynamics of the grain and how this may be affected by the initial inoculum position in the grain mass is poorly understood. This study examined the 3D growth kinetics and mycotoxin production (deoxynivalenol and zearalenone) by F. graminearum during hyphal colonisation from different initial inoculum positions in wheat microcosms (top-centre, bottom-centre, and bottom-side) maintained at two water activities (aw; 0.95 and 0.97). Clear jars were used to visually follow the colonisation dynamics. Fungal respiration and associated dry matter loss (DML) and ergosterol were also quantified. Colonisation dynamics was shown to be affected by the inoculation position. At the end of the colonisation process, fungal respiration and DML were driven by the inoculation position, and the latter also by the prevailing aw. Fungal biomass (ergosterol) was mainly affected by the aw. The initial inoculum position did not affect the relative mycotoxin production. There was a positive correlation between respiration and ergosterol, and between mycotoxin production and colonisation indicators. We suggest that spatially explicit predictive models can be used to better understand the colonisation patterns and mycotoxin contamination of stored cereal commodities and to aid more effective post-harvest management.en_UK
dc.identifier.citationPortell X, Verheecke-Vaessen C, Torrelles-Ràfales R, et al., (2020) Three-dimensional study of F. graminearum colonisation of stored wheat: post-harvest growth patterns, dry matter losses and mycotoxin contamination. Microorganisms, Volume 8, Issue 8, August 2020, Article number 1170en_UK
dc.identifier.issn2076-2607
dc.identifier.urihttps://doi.org/10.3390/microorganisms8081170
dc.identifier.urihttp://dspace.lib.cranfield.ac.uk/handle/1826/15649
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/*
dc.subjecttrichothecenesen_UK
dc.subjectdeoxynivalenolen_UK
dc.subjectzearalenoneen_UK
dc.subjectergosterolen_UK
dc.subjectrespirationen_UK
dc.subject3D colonisationen_UK
dc.subjectfungien_UK
dc.subjectsiloen_UK
dc.subjectCerealsen_UK
dc.titleThree-dimensional study of F. graminearum colonisation of stored wheat: post-harvest growth patterns, dry matter losses and mycotoxin contaminationen_UK
dc.typeArticleen_UK

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