1 research outputs found
Mycotoxin production from fungi isolated from grapes
Aims: In order to assess the potential for producing mycotoxins, fungi were isolated from
wine producing grapes.
Methods and Results: The isolates were identified and Penicillium expansum, the most well
recognized mycotoxin producer, was analysed for mycotoxin production by TLC. Many of the
strains produced patulin and/or citrinin, often depending on whether they were grown on a
grape or yeast extract sucrose media.
Conclusions: Citrinin was produced by all strains grown in the yeast extract sucrose medium,
but only one strain (from 51) was able to produce this compound in grape juice medium.
Patulin was produced in the yeast extract medium by 20 strains and in grape juice medium by
33 strains.
Significance and Impact of the Study: The presence of mycotoxins in wine producing
grapes is discussed. Grapes contamination with patulin seems not to contribute to wine
contamination, and no ochratoxin producing fungi was identified.The British Council, Conselho de Reitores das Universidades Portuguesas (CRUP) - Windsor Programme - grant no 29/00