Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations

Detalhes bibliográficos
Autor(a) principal: Ferreira, Isabel C.F.R.
Data de Publicação: 2007
Outros Autores: Barros, Lillian, Soares, Maria Elisa, Bastos, Maria de Lourdes, Pereira, J.A.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10198/749
Resumo: Olive trees (Olea europaea L. Cv. Cobranc¸osa) from the northeast of Portugal were sprayed with three different copper formulations [bordeaux mixture (copper sulphate + calcium hydroxide - 20% Cu), copper hydroxide (40% Cu) and copper oxychloride (50% Cu)] to control olive fungal diseases. The residues of copper in olive leaves, harvested at different times, were evaluated by atomic absorption spectrometry. At all the collection times, treated olive leaves had significantly higher copper contents, compared to the control. The different copper amounts in pesticide formulations lowered the leaves contents in total phenols and hence their antioxidant properties. Olive leaves sprayed with copper oxychloride possessed the highest copper levels and the lowest content in phenols, which influenced its antioxidant activity (higher EC50 values for reducing power, scavenging effect on DPPH radicals and inhibition of erythrocyte hemolysis). Leaves without copper residues proved to be a good natural source of antioxidants, giving values comparable to the reference compounds.
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spelling Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulationsOlea europaeaOlive leavesCopperPhenolsAntioxidant activityOlive trees (Olea europaea L. Cv. Cobranc¸osa) from the northeast of Portugal were sprayed with three different copper formulations [bordeaux mixture (copper sulphate + calcium hydroxide - 20% Cu), copper hydroxide (40% Cu) and copper oxychloride (50% Cu)] to control olive fungal diseases. The residues of copper in olive leaves, harvested at different times, were evaluated by atomic absorption spectrometry. At all the collection times, treated olive leaves had significantly higher copper contents, compared to the control. The different copper amounts in pesticide formulations lowered the leaves contents in total phenols and hence their antioxidant properties. Olive leaves sprayed with copper oxychloride possessed the highest copper levels and the lowest content in phenols, which influenced its antioxidant activity (higher EC50 values for reducing power, scavenging effect on DPPH radicals and inhibition of erythrocyte hemolysis). Leaves without copper residues proved to be a good natural source of antioxidants, giving values comparable to the reference compounds.ElsevierBiblioteca Digital do IPBFerreira, Isabel C.F.R.Barros, LillianSoares, Maria ElisaBastos, Maria de LourdesPereira, J.A.2008-09-03T15:32:24Z20072007-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/749engFerreira, Isabel C.F.R.; Barros, Lillian; Soares, M. E.; Bastos, M. L.; Pereira, J.A. (2007). Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations. Food Chemistry. ISSN 0308-8146. 103:1, p. 188-195.0308-814610.1016/j.foodchem.2006.08.006info: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:RCAAP2023-11-21T10:03:47Zoai:bibliotecadigital.ipb.pt:10198/749Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T22:54:24.840983Repositório 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 Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
title Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
spellingShingle Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
Ferreira, Isabel C.F.R.
Olea europaea
Olive leaves
Copper
Phenols
Antioxidant activity
title_short Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
title_full Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
title_fullStr Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
title_full_unstemmed Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
title_sort Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations
author Ferreira, Isabel C.F.R.
author_facet Ferreira, Isabel C.F.R.
Barros, Lillian
Soares, Maria Elisa
Bastos, Maria de Lourdes
Pereira, J.A.
author_role author
author2 Barros, Lillian
Soares, Maria Elisa
Bastos, Maria de Lourdes
Pereira, J.A.
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Biblioteca Digital do IPB
dc.contributor.author.fl_str_mv Ferreira, Isabel C.F.R.
Barros, Lillian
Soares, Maria Elisa
Bastos, Maria de Lourdes
Pereira, J.A.
dc.subject.por.fl_str_mv Olea europaea
Olive leaves
Copper
Phenols
Antioxidant activity
topic Olea europaea
Olive leaves
Copper
Phenols
Antioxidant activity
description Olive trees (Olea europaea L. Cv. Cobranc¸osa) from the northeast of Portugal were sprayed with three different copper formulations [bordeaux mixture (copper sulphate + calcium hydroxide - 20% Cu), copper hydroxide (40% Cu) and copper oxychloride (50% Cu)] to control olive fungal diseases. The residues of copper in olive leaves, harvested at different times, were evaluated by atomic absorption spectrometry. At all the collection times, treated olive leaves had significantly higher copper contents, compared to the control. The different copper amounts in pesticide formulations lowered the leaves contents in total phenols and hence their antioxidant properties. Olive leaves sprayed with copper oxychloride possessed the highest copper levels and the lowest content in phenols, which influenced its antioxidant activity (higher EC50 values for reducing power, scavenging effect on DPPH radicals and inhibition of erythrocyte hemolysis). Leaves without copper residues proved to be a good natural source of antioxidants, giving values comparable to the reference compounds.
publishDate 2007
dc.date.none.fl_str_mv 2007
2007-01-01T00:00:00Z
2008-09-03T15:32:24Z
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/10198/749
url http://hdl.handle.net/10198/749
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Ferreira, Isabel C.F.R.; Barros, Lillian; Soares, M. E.; Bastos, M. L.; Pereira, J.A. (2007). Antioxidant activity and phenolic contents of Olea europaea L. leaves sprayed with different copper formulations. Food Chemistry. ISSN 0308-8146. 103:1, p. 188-195.
0308-8146
10.1016/j.foodchem.2006.08.006
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 Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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