Ochratoxin a risk assessment in portuguese wines: a one-year case study
Autor(a) principal: | |
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Data de Publicação: | 2003 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/1822/16655 |
Resumo: | During the 2001 wine vintage, grapes were sampled at harvest time in eleven vineyards located in four Portuguese wine regions (from north to south: Vinhos Verdes, Douro, Ribatejo and Alentejo) for filamentous fungi isolation and identification, and for ochratoxin A (OTA) analysis. In all studied vineyards, fungi isolates belonging to Penicillium and Aspergillus recognized as producers of OTA were tested to detect its production. Also, several strains were assessed for their ability to degrade OTA in other compounds. The Penicillium isolates were not OTA producers, although some were able to degrade OTA. Many of the Aspergillus strains belong to the black Aspergillus section, mainly: A. niger aggregate and A. carbonarius. Not all the strains from the above-mentioned Aspergillus were able to produce OTA, but most of them were able to degrade OTA. It was found that just 13 out of 207 A. niger aggregate and 32 out of 33 A. carbonarius were OTA producers. Furthermore, all the black Aspergillus tested were able to degrade OTA, in many cases to the less toxic ochratoxin a. It was also observed a prevalence of not OTA producer strains over the producer ones, and many of these not OTA producer strains were able to degrade OTA. The presence of OTA in grapes from all sampled vineyards was determined. However, it was not possible to correlate the presence of OTA in grapes with the presence of OTA producer strains in the same grapes. The possibility that the presence of OTA in grapes is due to in vivo interactions between the ability to produce and to degrade the mycotoxin by fungi is suggested. |
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Ochratoxin a risk assessment in portuguese wines: a one-year case studyEvaluation des risques de contamination des vins portugais par l’Ochratoxine A : étude menée sur un anPortuguese winesOchratoxin AContaminationAspergillusPenicilliumVins portugaisOchratoxine ADuring the 2001 wine vintage, grapes were sampled at harvest time in eleven vineyards located in four Portuguese wine regions (from north to south: Vinhos Verdes, Douro, Ribatejo and Alentejo) for filamentous fungi isolation and identification, and for ochratoxin A (OTA) analysis. In all studied vineyards, fungi isolates belonging to Penicillium and Aspergillus recognized as producers of OTA were tested to detect its production. Also, several strains were assessed for their ability to degrade OTA in other compounds. The Penicillium isolates were not OTA producers, although some were able to degrade OTA. Many of the Aspergillus strains belong to the black Aspergillus section, mainly: A. niger aggregate and A. carbonarius. Not all the strains from the above-mentioned Aspergillus were able to produce OTA, but most of them were able to degrade OTA. It was found that just 13 out of 207 A. niger aggregate and 32 out of 33 A. carbonarius were OTA producers. Furthermore, all the black Aspergillus tested were able to degrade OTA, in many cases to the less toxic ochratoxin a. It was also observed a prevalence of not OTA producer strains over the producer ones, and many of these not OTA producer strains were able to degrade OTA. The presence of OTA in grapes from all sampled vineyards was determined. However, it was not possible to correlate the presence of OTA in grapes with the presence of OTA producer strains in the same grapes. The possibility that the presence of OTA in grapes is due to in vivo interactions between the ability to produce and to degrade the mycotoxin by fungi is suggested.En 2001, au moment des vendanges, nous avons cueilli des raisins dans onze vignes situées dans quatre régions viticoles du Portugal (du nord au sud: Vinhos Verdes, Douro, Ribatejo et Alentejo) pour isoler et identifier les moisissures filamenteuses et pour analyser la présence d’ochratoxine A (OTA). Pour toutes les vignes étudiées, les espèces de Penicillium et Aspergillus connues comme productrices d’OTA ont été testées quant à la production de cette mycotoxine. Nous avons aussi testé quelques moisissures pour savoir si elles étaient capables de transformer l’OTA et de produire des composés moins toxiques. La plupart des Aspergillus isolés appartiennent au groupe Aspergillus noir comme: A. niger (agrégat) et A. carbonarius. Cependant, nous avons trouvé que seulement 13 des 207 appartenant à l’agrégat A. niger et 32 des 33 A. carbonarius étaient producteurs d’OTA. Nous avons aussi constaté, dans la plupart des cas, que les Aspergillus noirs ont été capables de transformer l´OTA en ochratoxine a (OTa). Nous avons pourtant trouvé dans les raisins une prédominance des moisissures non productrices d’OTA et des moisissures capables de transformer l´OTA. La présence de l´OTA dans les raisins de toutes les vignes échantillonnées a également été déterminée. Toutefois, il n´a pas été possible de relier la présence d´OTA dans les raisins avec la présence des espèces productrices de cette mycotoxine dans ces mêmes raisins. Les espèces capables de transformer l´OTA peuvent-elles, in vivo, jouer un rôle important?Organisation Internationale de la Vigne et du VinUniversidade do MinhoAbrunhosa, LuísSerra, RitaLima, NelsonVenâncio, Armando20032003-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/1822/16655eng0029-7127info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:11:25Zoai:repositorium.sdum.uminho.pt:1822/16655Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:03:12.038798Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Ochratoxin a risk assessment in portuguese wines: a one-year case study Evaluation des risques de contamination des vins portugais par l’Ochratoxine A : étude menée sur un an |
title |
Ochratoxin a risk assessment in portuguese wines: a one-year case study |
spellingShingle |
Ochratoxin a risk assessment in portuguese wines: a one-year case study Abrunhosa, Luís Portuguese wines Ochratoxin A Contamination Aspergillus Penicillium Vins portugais Ochratoxine A |
title_short |
Ochratoxin a risk assessment in portuguese wines: a one-year case study |
title_full |
Ochratoxin a risk assessment in portuguese wines: a one-year case study |
title_fullStr |
Ochratoxin a risk assessment in portuguese wines: a one-year case study |
title_full_unstemmed |
Ochratoxin a risk assessment in portuguese wines: a one-year case study |
title_sort |
Ochratoxin a risk assessment in portuguese wines: a one-year case study |
author |
Abrunhosa, Luís |
author_facet |
Abrunhosa, Luís Serra, Rita Lima, Nelson Venâncio, Armando |
author_role |
author |
author2 |
Serra, Rita Lima, Nelson Venâncio, Armando |
author2_role |
author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Abrunhosa, Luís Serra, Rita Lima, Nelson Venâncio, Armando |
dc.subject.por.fl_str_mv |
Portuguese wines Ochratoxin A Contamination Aspergillus Penicillium Vins portugais Ochratoxine A |
topic |
Portuguese wines Ochratoxin A Contamination Aspergillus Penicillium Vins portugais Ochratoxine A |
description |
During the 2001 wine vintage, grapes were sampled at harvest time in eleven vineyards located in four Portuguese wine regions (from north to south: Vinhos Verdes, Douro, Ribatejo and Alentejo) for filamentous fungi isolation and identification, and for ochratoxin A (OTA) analysis. In all studied vineyards, fungi isolates belonging to Penicillium and Aspergillus recognized as producers of OTA were tested to detect its production. Also, several strains were assessed for their ability to degrade OTA in other compounds. The Penicillium isolates were not OTA producers, although some were able to degrade OTA. Many of the Aspergillus strains belong to the black Aspergillus section, mainly: A. niger aggregate and A. carbonarius. Not all the strains from the above-mentioned Aspergillus were able to produce OTA, but most of them were able to degrade OTA. It was found that just 13 out of 207 A. niger aggregate and 32 out of 33 A. carbonarius were OTA producers. Furthermore, all the black Aspergillus tested were able to degrade OTA, in many cases to the less toxic ochratoxin a. It was also observed a prevalence of not OTA producer strains over the producer ones, and many of these not OTA producer strains were able to degrade OTA. The presence of OTA in grapes from all sampled vineyards was determined. However, it was not possible to correlate the presence of OTA in grapes with the presence of OTA producer strains in the same grapes. The possibility that the presence of OTA in grapes is due to in vivo interactions between the ability to produce and to degrade the mycotoxin by fungi is suggested. |
publishDate |
2003 |
dc.date.none.fl_str_mv |
2003 2003-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/1822/16655 |
url |
http://hdl.handle.net/1822/16655 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0029-7127 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Organisation Internationale de la Vigne et du Vin |
publisher.none.fl_str_mv |
Organisation Internationale de la Vigne et du Vin |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799132436805713920 |