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

2011Journal article Restricted access
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dc.contributor.authorCoelho, Mara Teresa
dc.contributor.authorGonçalves, José Carlos
dc.contributor.authorAlves, Vítor
dc.contributor.authorMartins, Margarida Moldão
dc.date.accessioned2013-07-18T16:57:30Z
dc.date.available2013-07-18T16:57:30Z
dc.date.issued2011
dc.descriptiondoi:10.1016/j.profoo.2011.09.215por
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 fungus.por
dc.identifier.citationCOELHO, M.T. [et al.] (2011) - Antioxidant activity and phenolic content of extracts from different Pterospartum tridentatum populations growing in Portugal. Procedia Food Science. ISSN 2211-601X. 1. p. 1454-1458.por
dc.identifier.issn2211-601X
dc.identifier.urihttp://hdl.handle.net/10400.11/2007
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherElsevierpor
dc.relation.publisherversionhttp://www.sciencedirect.com/science?_ob=PublicationURL&_method=list&_hubEid=1-s2.0-S2211601X11X00020&_auth=y&_version=1&refSource=toc&_pubType=J&PDF_DDM_MAX=20&_cid=282070&md5=643ce7a99d937e16f274acdd49c5f7aa&chunk=1&view=c&go=next&count=300&pdfDownload=&count=300&PREV_LIST=0&NEXT_LIST=Ypor
dc.subjectPterospartum tridentatumpor
dc.subjectAqueous extractspor
dc.subjectExtraction yieldpor
dc.subjectAntioxidant activitypor
dc.subjectPhenolic contentpor
dc.titleAntioxidant activity and phenolic content of extracts from different Pterospartum tridentatum populations growing in Portugalpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1458por
oaire.citation.startPage1454por
oaire.citation.titleProcedia Food Sciencepor
oaire.citation.volume1por
person.familyNamePita Pegado Gonçalves Rodrigues Coelho
person.familyNameGonçalves
person.givenNameMaria Teresa
person.givenNameJosé
person.identifier508085
person.identifier.ciencia-id7712-5E8C-98E9
person.identifier.ciencia-idAE1F-12BE-65DD
person.identifier.orcid0000-0002-4461-6670
person.identifier.orcid0000-0003-3387-4487
person.identifier.scopus-author-id24831942500
person.identifier.scopus-author-id7103325479
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor
relation.isAuthorOfPublication44c3e10b-fe15-4f49-92eb-f200284a2f4a
relation.isAuthorOfPublication3f401604-ccbb-45f3-8ee1-05063cf3d60a
relation.isAuthorOfPublication.latestForDiscovery3f401604-ccbb-45f3-8ee1-05063cf3d60a

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