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EnglishBerries of Vitis vinifera L. cv. Barbera were infected, at veraison and during ripening, by a conidial suspension of A. japonicus, A. ochraceus, A. fumigatus and two isolates of A. carbonarius to control ochratoxin A production and stilbene induced synthesis. The experimental design provided also for intact and punctured berries and incubation temperature of 25 degrees C and 30 degrees C. All the tested fungi, except A. fumigatus, significantly increased trans-resveratrol synthesis over the control, while trans-piceid was not affected; only A. ochraceus significantly elicited the berries to synthesize piceatannol. The two isolates of A. carbonarius produced higher amounts of ochratoxin A than did the other fungi. A positive correlation between ochratoxin A and trans-resveratrol synthesis occurred. trans-Resveratrol and piceatannol showed fungicidal activity against A. carbonarius, being able to completely inhibit fungal growth at a concentration of 300 micro g/g and 20 micro g/g, respectively.
| Autori: | |
| Titolo: | Effect of ochratoxin A-producing Aspergilli on stilbenic phytoalexin synthesis in grapes |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1021/jf0301908 |
| Data di pubblicazione: | 2003 |
| Abstract: | Berries of Vitis vinifera L. cv. Barbera were infected, at veraison and during ripening, by a conidial suspension of A. japonicus, A. ochraceus, A. fumigatus and two isolates of A. carbonarius to control ochratoxin A production and stilbene induced synthesis. The experimental design provided also for intact and punctured berries and incubation temperature of 25 degrees C and 30 degrees C. All the tested fungi, except A. fumigatus, significantly increased trans-resveratrol synthesis over the control, while trans-piceid was not affected; only A. ochraceus significantly elicited the berries to synthesize piceatannol. The two isolates of A. carbonarius produced higher amounts of ochratoxin A than did the other fungi. A positive correlation between ochratoxin A and trans-resveratrol synthesis occurred. trans-Resveratrol and piceatannol showed fungicidal activity against A. carbonarius, being able to completely inhibit fungal growth at a concentration of 300 micro g/g and 20 micro g/g, respectively. |
| Lingua: | Inglese |
| Rivista: | |
| Citazione: | Bavaresco, L., Vezzulli, S., Battilani, P., Giorni, P., Pietri, A., Bertuzzi, T., Effect of ochratoxin A-producing Aspergilli on stilbenic phytoalexin synthesis in grapes, <<JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY>>, 2003; 2003/51 (21): 6151-6157. [doi:10.1021/jf0301908] [http://hdl.handle.net/10807/11328] |
| Appare nelle tipologie: | Articolo in rivista, Nota a sentenza |
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