Grains colonised by moulds: fungal identification and headspace analysis of produced volatile metabolites

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ID: 3798
2010
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Abstract
The aim of this work was to verify if the headspace analysis of fungal volatile compounds produced by some species of Fusarium can be used as a marker of mould presence on maize. Eight samples of maize (four yellow maize from North Italy and four white maize from Hungary), naturally contaminated by Fusarium and positive for the presence of fumonisins, were analyzed to detect moisture content, Aw, volatile metabolites and an enumeration of viable moulds was performed by means of a colony count technique. Headspace samples were analysed using a gas-chromatograph equipped with a capillary column TR-WAX to detect volatile metabolites of moulds. Furthermore macro and microscopic examination of the colonies was performed in order to distinguish, according to their morphology, the genera of the prevalent present moulds. Prevalent mould of eight samples was Fusarium, but other fungi, like Aspergillus, Penicillum and Mucoraceae, were observed. The metabolites produced by F.graminearum and F. moniliforme were Isobutyl-acetate, 3-Methyl-1-butanol and, only at 8 days, 3-Octanone. The incubation time can affect off flavour production in consequence of the presence of other moulds. Further studies on maize samples under different conditions are needed in order to establish the presence of moulds using the count technique and through the identification of volatile compounds.
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tampieri2010grainsitalian Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Tampieri, Maria Paola;Bonoli, Cristina;Canestrari, Giorgia;Simioli, Marco;Galuppi, Roberta;Rizzi, Laura;
Journal italian journal of animal science
Year 2010
DOI
DOI not found
URL
http://www.aspajournal.it/index.php/ijas/article/view/449
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