Mycotoxin production byPenicillium expansumon blackcurrant and cherry juice

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Abstract
The production of mycotoxins and other secondary metabolites by Penicillium expansum on blackcurrant and cherry juice has been studied at 10°C and 25°C under storage imitated conditions. P. expansum was able to synthesize extracellular patulin under all conditions, and together with extracellular chaetoglobosin A when unlimited oxygen was available. Patulin, the chaetoglobosins A and C, the communesins A and B and the expansolides A and B could be detected intracellularly depending on the conditions. The metabolites were detected using thin‐layer chromatography and high‐performance liquid chromatography with diode array detection by comparison to standards. A method to detect the expansolides A and B by TLC was developed.