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Antioxidant activity and phenolic content of extracts from different Pterospartum tridentatum populations growing in Portugal

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dc.contributor.authorCoelho, Maria Teresa
dc.contributor.authorGonçalves, José Carlos
dc.contributor.authorDelgado Alves, Vitor
dc.contributor.authorMoldão, Margarida
dc.date.accessioned2019-05-09T13:18:59Z
dc.date.available2019-05-09T13:18:59Z
dc.date.issued2011
dc.description.abstractIn the present study, aerial parts of Pterospartum tridentatum plants, collected in three locations in Portugal, at different vegetative stages, were evaluated for their total phenolic content and the antioxidant activity of aqueous extracts. The influence of the seasonal variation in the yield and composition of the extracts was evaluated, in order to select the most appropriate harvest season. Among the populations assayed, the extraction yields have some differences with the harvest period but the highest yield extraction was obtained in the flowering season, using flowers (19.4g/100g plant dry mass) and the lowest extraction yield was also obtained in the same period but using stems. The antioxidant activity of the solid extracts of Pterospartum tridentatum aerial parts, was determined by the radical scavenging activity method using 2,2-diphenyl-1-picrylhydrazyl radical (DPPH). The greatest DPPH radical scavenging activity was observed in the flowering period (3.6 mMTrolox/Kg dry mater), but no significant differences for the dormancy period. According to these results, we can choose the harvest season more favorable. The total phenolic content (TP) of the extracts was evaluated by measuring the absorbance at 280 nm and the values ranged from 270.7 to 402.9 mg gallic acid equivalents per g dry matter. The vegetative stage did not influence this total phenolic content. From preliminary experiments, it is also anticipated a significant antimicrobial activity of the solid extracts against bacteria and funguspt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationProcedia Food Science 1 (2011) 1454 – 1458pt_PT
dc.identifier.doidoi:10.1016/j.profoo.2011.09.215pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/17781
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectPterospartum tridentatumpt_PT
dc.subjectaqueous extractspt_PT
dc.subjectextraction yieldpt_PT
dc.subjectantioxidant activitypt_PT
dc.subjectphenolic contentpt_PT
dc.titleAntioxidant activity and phenolic content of extracts from different Pterospartum tridentatum populations growing in Portugalpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlace11th International Congress on Engineering and Food (ICEF11)pt_PT
oaire.citation.titleProcedia Food Sciencept_PT
person.familyNameDelgado Alves
person.familyNameMoldao-Martins
person.givenNameVitor
person.givenNameMargarida
person.identifier1916677
person.identifier.ciencia-id2E1E-6918-4DB3
person.identifier.ciencia-id9F1F-85B6-C3EC
person.identifier.orcid0000-0002-4117-5582
person.identifier.orcid0000-0003-0558-8715
person.identifier.scopus-author-id24536716000
person.identifier.scopus-author-id6506047512
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8d1a8489-8789-4569-89e2-0bade23dd945
relation.isAuthorOfPublicationbf1df164-d6fd-4b4f-833f-db9cbb390005
relation.isAuthorOfPublication.latestForDiscovery8d1a8489-8789-4569-89e2-0bade23dd945

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