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Artigo Produção Nacional
BIBTEX RIS

Potential ochratoxin A producers from wine grapes in Argentina and Brazil

2002; Taylor & Francis; Volume: 19; Issue: 4 Linguagem: Inglês

10.1080/02652030110092748

ISSN

1464-5122

Autores

C.A.R. Rosa, Víctor Palacios, Mariana Combina, Marcelo Elias Fraga, A. De Oliveira Rekson, C. Magnoli, A. Dalcero,

Tópico(s)

Plant and fungal interactions

Resumo

Abstract The aim was to identify the normal mycoflora in wine grapes from Argentina and Brazil. We collected 50 grapes samples from Malbec and Chardonnay varieties in each country during the 1997–98 harvest. Yeasts were a major component of the fungal population, and the most frequent genera of filamentous fungi isolated were: Aspergillus, Penicillium and Botrytis. Other genera identified (in decreasing order) were: Phythophthora, Moniliella, Alternaria and Cladosporium. From grapes, the mean frequency of filamentous fungi ranged from 1.3 × 104 to 5.4 × 106 CFUg-1. We isolated 48 Aspergillus niger strains from Argentinian grape, of which eight could produce ochratoxin A. Sixteen of 53 A. niger strains from Brazilian grapes produced ochratoxin A. The results indicate that similar mycobiota were isolated from Argentinian and Brazilian wine grapes and there could be ochratoxin A production in this substrate. Keywords: Wine GrapesOchratoxinMycobiotaAspergillus SectionNigri

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