Black Aspergillus species as ochratoxin A producers in Portuguese wine grapes
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چکیده
منابع مشابه
Black Aspergillus species as ochratoxin A producers in Portuguese wine grapes.
To evaluate the incidence of fungi producing ochratoxin A (OA) in Portuguese wine grapes, a survey was conducted in 11 vineyards, from four winemaking regions each with distinct climatic conditions. From setting to the harvesting period, a total of 1,650 berries were sampled by plating methods. Out of 370 aspergilli and 301 Penicillium strains isolated, 14% of the aspergilli were OA-producing s...
متن کاملEcophysiology of Aspergillus Section Nigri Species Potential Ochratoxin A Producers
After aflatoxins, ochratoxin A (OTA) is the most studied mycotoxin due to the toxicological significance in human and animal diets. OTA presence has been extensively reported worldwide in the last decade in several agricultural products. The main OTA producer in tropical and temperate climates is Aspergillus carbonarius followed by species belonging to A. niger aggregate. Currently, many scient...
متن کاملOchratoxin A occurrence and formation in Portuguese wine grapes at various stages of maturation.
A total of 93 Portuguese grape samples destined for wine production were examined for the presence of ochratoxin A (OTA) and the OTA producing fungi Aspergillus carbonarius and A. niger aggregate. Samples came from 11 vineyards from four winemaking regions in the North and South of the Portuguese mainland, during the harvest seasons of 2001, 2002 and 2003. Grapes were examined at 3 maturation s...
متن کاملAspergilli as ochratoxin producers.
To determine whether ochratoxin is produced by species of Aspergillus other than A. ochraceus, 44 strains representative of the nine species composing the A. ochraceus group were grown on both pearled wheat and cracked corn in duplicate shaken flasks at 28 C for 5 days. Rice was a poor substrate for production of ochratoxin. Molded substrates were extracted with acetonitrile-water; partially pu...
متن کاملFungi and ochratoxin A detected in healthy grapes for wine production.
AIMS The mycoflora of healthy grapes (i.e. without visible symptoms of rot) for wine production in Portuguese wine-making regions was assessed and its potential for ochratoxin A (OTA) production evaluated. The OTA content of grapes was also determined. METHODS AND RESULTS A total of 386 fungal strains were isolated by plating methods. The most frequent genera found in grapes were non-ochratox...
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ژورنال
عنوان ژورنال: International Journal of Food Microbiology
سال: 2003
ISSN: 0168-1605
DOI: 10.1016/s0168-1605(03)00085-0