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Chemical characterization and extractives composition of heartwood and sapwood from Quercus faginea

2017Journal article Open access
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dc.contributor.authorMiranda, Isabel
dc.contributor.authorSousa, Vicelina
dc.contributor.authorFerreira, Joana
dc.contributor.authorPereira, Helena
dc.date.accessioned2017-07-04T09:11:28Z
dc.date.available2017-07-04T09:11:28Z
dc.date.issued2017
dc.descriptionResearch Articlept_PT
dc.description.abstractHeartwood and sapwood of Quercus faginea were evaluated in relation to summative chemical composition and non-polar and polar extracts composition, including an assessment of antioxidant properties (DPPH and FRAP). Twenty trees from two sites in Portugal were analysed. Heartwood had approximately two times more solvent extractible compounds than sapwood (on average 19.0% and 9.5%). The lipophilic extractible compounds were below 1%, and most of them were polar e.g. ethanol-soluble compounds corresponded to 65% of total extractives in heartwood and 43% in sapwood. Lignin content was similar in sapwood and heartwood (28.1% and 28.6% of extractive-free wood respectively) as well as the sugar composition. Site did not influence the chemical composition. The lipophilic extractible compounds from both sapwood and heartwood included mainly saturated fatty acids (23.0% and 36.9% respectively) and aromatic compounds were also abundant in sapwood (22.9%). The ethanol-water extractibles had a high content of phenolic substances (558.0 and 319.4 mg GAE/g extract, respectively of heartwood and sapwood). The polyphenolic composition was similar in heartwood and sapwood with higher content of ellagitannins (168.9 and 153.5 mg tannic acid/g of extract in sapwood and heartwood respectively) and very low content of condensed tannins. The antioxidant activity was very high with IC50 of 2.6 μg/ml and 3.3 μg/ml for sapwood and heartwood respectively, as compared to standard antioxidants (IC50 of 3.8 μg/ml for Trolox). The ferric reducing ability was 2.8 and 2.0 mMol Trolox equivalents/ g extract of heartwood and sapwood respectively. The variability between trees was low and no differences between the two sites were found. Q. faginea showed a very good potential for cooperage and other applications for which a source of compounds with antioxidant properties is desirablept_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMiranda I, Sousa V, Ferreira J, Pereira H (2017) Chemical characterization and extractives composition of heartwood and sapwood from Quercus faginea. PLoS ONE 12(6): e0179268.pt_PT
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0179268pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/13844
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherHoracio Bach (ed.)pt_PT
dc.relationSFRH /BPD/ 97970/2013pt_PT
dc.subjectQuercus fagineapt_PT
dc.subjectheartwoodpt_PT
dc.subjectsapwoodpt_PT
dc.titleChemical characterization and extractives composition of heartwood and sapwood from Quercus fagineapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAGR%2F00239%2F2013/PT
oaire.citation.titlePLoS ONEpt_PT
oaire.fundingStream5876
person.familyNameSousa
person.givenNameVicelina
person.identifier223146
person.identifier.ciencia-idD71A-897F-89A0
person.identifier.orcid0000-0003-4221-0041
person.identifier.ridB-3067-2016
person.identifier.scopus-author-id14826214800
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication4afaffdd-25ee-4d07-af3e-237c2ffe5866
relation.isAuthorOfPublication.latestForDiscovery4afaffdd-25ee-4d07-af3e-237c2ffe5866
relation.isProjectOfPublication560d5e42-c1ac-4401-a3f8-518d12401c5a
relation.isProjectOfPublication.latestForDiscovery560d5e42-c1ac-4401-a3f8-518d12401c5a

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