Publicação
Mycotoxigenic fungi in Portuguese wine regions : fumonisin B2 and ochratoxin A
| Resumo: | Studies were conducted between 2001 and 2003 to evaluate the incidence of ochratoxigenic strains in Portuguese wine-grapes. At that time, the main responsible for ochratoxin A production in grapes were found to be Aspergillus carbonarius with a production mean of 1.13 mg/kg and some strains from the Aspergillus niger aggregate with a production mean of 0.14 mg/kg. At that time also, all the black aspergilli isolates were preserved in glycerol and stored at -80 ºC. Since recently A. niger was reported as a producer of the mycotoxin fumonisin B2, its levels produced by black aspergilli isolates from the Portuguese grapes were investigated. Approximately 29% of A. niger aggregate strains were found to produce it between 0.003–6.0 mg/kg with a mean of 0.66 mg/kg and only 6% produced more than 1 mg/kg. The incidence and distribution of fumonisinogenic strains among five Portuguese wine-regions is also presented and correlated with data of the ochratoxigenic ones. |
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| Autores principais: | Calado, Thalita |
| Outros Autores: | Abrunhosa, Luís; Venâncio, Armando |
| Assunto: | Wine Ochratoxin A Fumonisins |
| Ano: | 2011 |
| País: | Portugal |
| Tipo de documento: | outro |
| Tipo de acesso: | acesso aberto |
| Instituição associada: | Universidade do Minho |
| Idioma: | inglês |
| Origem: | RepositóriUM - Universidade do Minho |
| Resumo: | Studies were conducted between 2001 and 2003 to evaluate the incidence of ochratoxigenic strains in Portuguese wine-grapes. At that time, the main responsible for ochratoxin A production in grapes were found to be Aspergillus carbonarius with a production mean of 1.13 mg/kg and some strains from the Aspergillus niger aggregate with a production mean of 0.14 mg/kg. At that time also, all the black aspergilli isolates were preserved in glycerol and stored at -80 ºC. Since recently A. niger was reported as a producer of the mycotoxin fumonisin B2, its levels produced by black aspergilli isolates from the Portuguese grapes were investigated. Approximately 29% of A. niger aggregate strains were found to produce it between 0.003–6.0 mg/kg with a mean of 0.66 mg/kg and only 6% produced more than 1 mg/kg. The incidence and distribution of fumonisinogenic strains among five Portuguese wine-regions is also presented and correlated with data of the ochratoxigenic ones. |
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