Aspergillus carbonarius in syrah grapes grown in three wine-growing regions of Brazil

Terra M. F., . and Bastos S. C., . and Pereira G. E., . and Passamani F. R. F, . and Freire L., . and Batista L. R., . Aspergillus carbonarius in syrah grapes grown in three wine-growing regions of Brazil. pp. 2207-2211. ISSN 2231-7546

Contamination by ochratoxin A (OTA) in agricultural products grown in regions with different climate conditions is difficult to predict since this contamination depends on a complex interaction of factors. Thus the aim of this study was to use a mathematical model to predict OTA synthesis by Aspergillus carbonarius in grape (Vitis vinifera) of the Syrah variety grown in three wine-growing regions considering the mean monthly temperature of the environment and water activity and pH of grape. Results indicate that the greatest risks of contamination by the toxin are in the months when the temperature is below 19.0C and these months are just before grape harvest. However with the predicted increase in temperature these conditions change i.e. they are no longer favorable to OTA synthesis thus reducing the risks of the presence of the toxin in cultivated grapes. For the tropical region the current environmental temperature and water availability to grape are not favorable to OTA synthesis showing that even if A. carbonarius is present in the crop it does not encounter suitable conditions of environmental temperature water activity and grape pH to synthesize OTA.

Full text available from: Official URL: http://www.ifrj.upm.edu.my/24%20(05)%202017/(51).p...

Abstract

Contamination by ochratoxin A (OTA) in agricultural products grown in regions with different climate conditions is difficult to predict since this contamination depends on a complex interaction of factors. Thus the aim of this study was to use a mathematical model to predict OTA synthesis by Aspergillus carbonarius in grape (Vitis vinifera) of the Syrah variety grown in three wine-growing regions considering the mean monthly temperature of the environment and water activity and pH of grape. Results indicate that the greatest risks of contamination by the toxin are in the months when the temperature is below 19.0C and these months are just before grape harvest. However with the predicted increase in temperature these conditions change i.e. they are no longer favorable to OTA synthesis thus reducing the risks of the presence of the toxin in cultivated grapes. For the tropical region the current environmental temperature and water availability to grape are not favorable to OTA synthesis showing that even if A. carbonarius is present in the crop it does not encounter suitable conditions of environmental temperature water activity and grape pH to synthesize OTA.

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Item Type:	Article
AGROVOC Term:	Aspergillus
AGROVOC Term:	Ochratoxins
AGROVOC Term:	Secondary metabolites
AGROVOC Term:	Contamination
AGROVOC Term:	Agricultural products
AGROVOC Term:	Climate change
AGROVOC Term:	Tropical zones
AGROVOC Term:	Vitis vinifera
AGROVOC Term:	Mathematical models
AGROVOC Term:	Environmental temperature
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23863

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