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Antioxidant properties of flowers and vegetative parts of wild Taraxacum sect. Ruderalia

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dc.contributor.authorDias, Maria Inês
dc.contributor.authorBarros, Lillian
dc.contributor.authorSousa, Maria João
dc.contributor.authorAlves, Rita C.
dc.contributor.authorOliveira, Beatriz
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2013-09-09T15:18:22Z
dc.date.available2013-09-09T15:18:22Z
dc.date.issued2013
dc.description.abstractThe species of the genus Taraxacum are known as dendalion (due to the shape of the leaves) and are commonly found in the Northern Hemisphere, in inhabiting fields and roadsides with warmer temperatures. Dendalion infusion and decoction are used in traditional medicine to treat kidney disease, dyspepsia, arthritic and rheumatic complaints, skin problems like eczema and even diabetes mellitus. Besides the pharmaceutical uses, the whole plant is included in many food products [1]. One of the most commonly consumed species is T. officinale; however, traditional collectors have sometimes difficulties in distinguish different Taraxacum species. In the present study, two samples of wild Taraxacum sect. Rudera/ia collected in Bragan9a, flowers and vegetative parts, were studied for their antioxidant activity. Free radicals (DPPH- 2,2-diphenyl-1- picrylhydrazyl) scavenging activity, reducing power and lipid peroxidation inhibition were evaluated on the methanolic extract, infusion and decoction of dandelion samples. The results of the antioxidant activity of the flowers and vegetative parts were very similar. Decoctions of both samples showed the highest DPPH scavenging activity (EC50= 0.42 and 0.12 mg/ml for flowers and vegetative parts, respectively). The decoction of vegetative parts also showed the highest reducing power (EC50= 0.16 mg/ml). The decoction of flowers and the infusion of vegetative parts showed very similar results for 13-carotene bleaching inhibition (EC50= 0.40 and 0.46 mg/ml, respectively) .The methanolic extract of vegetative parts showed the highest activity in TSARS (thiobarbituric acid reactive substances) assay (EC50= 0.13 mg/ml), although the infusion revealed also a low EC50 value for the same assay (0.16 mg/ml). As far as we know, there are no previously studies on the comparison of the antioxidant activity of different extracts and parts of this species of dendalion. More studies will be conducted to evaluate the activity against human tumour cell lines and to characterize the bioactive compounds present in the different extracts.por
dc.description.sponsorshipFCT for financial support to the research centre CIMO (PEst-OE/AGR/UI0690/2011) and REOUIMTE (PEst-C/EOB/LA0006/2011 ). M.l. Dias, L. Barros and R.C. Alves also thank to FCT, POPH-OREN and FSE for their grants (SFRH/80/84485/2012, SFRH/BPD/4609/2008 and SFRH/BPD/68883/201 0, respectively).por
dc.identifier.citationDias, Maria Inês; Barros, Lillian; Sousa, Maria João; Alves, Rita C.; Oliveira, M. Beatriz P.P.; Ferreira, Isabel C.F.R. (2013). Antioxidant properties of flowers and vegetative parts of wild Taraxacum sect. Ruderalia. In 1st Symposium on Medicinal Chemistry. Bragapor
dc.identifier.urihttp://hdl.handle.net/10198/8692
dc.language.isoengpor
dc.peerreviewedyespor
dc.relationPEst-C/EOB/LA0006/2011
dc.relationStrategic Project - UI 690 - 2011-2012
dc.relationSFRH/BPD/4609/2008
dc.relationIMPROVING SECONDARY METABOLITES PRODUCTION THROUGH IN VITRO CULTURE TECHNIQUE: CHEMICAL AND GENETIC CHARACTERIZATION OF EDIBLE PLANTS, BIOACTIVE PROPERTIES AND MICROENCAPSULATION OF PHENOLIC FRACTIONS
dc.relationALERGÉNIOS ALIMENTARES: DESENVOLVIMENTO DE IMUNO-BIOSSENSORES ELECTROQUÍMICOS PARA SUA DETECÇÃO
dc.titleAntioxidant properties of flowers and vegetative parts of wild Taraxacum sect. Ruderaliapor
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleStrategic Project - UI 690 - 2011-2012
oaire.awardTitleIMPROVING SECONDARY METABOLITES PRODUCTION THROUGH IN VITRO CULTURE TECHNIQUE: CHEMICAL AND GENETIC CHARACTERIZATION OF EDIBLE PLANTS, BIOACTIVE PROPERTIES AND MICROENCAPSULATION OF PHENOLIC FRACTIONS
oaire.awardTitleALERGÉNIOS ALIMENTARES: DESENVOLVIMENTO DE IMUNO-BIOSSENSORES ELECTROQUÍMICOS PARA SUA DETECÇÃO
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/PEst-OE%2FAGR%2FUI0690%2F2011/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F84485%2F2012/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F68883%2F2010/PT
oaire.citation.conferencePlaceBraga, Portugalpor
oaire.citation.title1st Symposium on Medicinal Chemistry of University of Minhopor
oaire.fundingStream6817 - DCRRNI ID
person.familyNameDias
person.familyNameBarros
person.familyNameSousa
person.familyNameFerreira
person.givenNameMaria Inês
person.givenNameLillian
person.givenNameMaria João
person.givenNameIsabel C.F.R.
person.identifier469085
person.identifier144781
person.identifier.ciencia-id2A13-4BE6-C7CF
person.identifier.ciencia-id9616-35CB-D001
person.identifier.ciencia-idD91E-3571-3979
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0001-8744-7814
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0002-9946-4926
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridM-8242-2013
person.identifier.ridJ-3600-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id54388787000
person.identifier.scopus-author-id35236343600
person.identifier.scopus-author-id55230282700
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspor
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