Repository logo
 
Publication

Nutritional value and chemical composition of purslane leaves in relation to harvest stage

2021Conference object Open access
Simple item page
dc.contributor.authorPolyzos, Nikolaos
dc.contributor.authorFernandes, Ângela
dc.contributor.authorDias, Maria Inês
dc.contributor.authorPetropoulos, Spyridon Α.
dc.contributor.authorFerreira, Isabel C.F.R.
dc.contributor.authorBarros, Lillian
dc.date.accessioned2022-01-26T11:39:07Z
dc.date.available2022-01-26T11:39:07Z
dc.date.issued2021
dc.description.abstractPurslane (Portulaca oleraceae L.) is an omnipresent weed, while it is also considered a common ingredient of the Mediterranean diet due to its high nutritional value with particular reference to omega-3 fatty acids content ln the present study, we evaluated the nutritional value and chemical composition of purslane leaves in relation to harvesting stage. Plants were harvested at three growth stages (29, 43 and 52 days a:fter sowing (DAS)), while leaves were separated from the aerial parts ofthe plant. Leaves contained high amounts of macronutrients, especially at 52 DAS. a-Tocopherol was the main isoform, which increased at 52 DAS, as well as the total tocopherols (values were in the ranges of 197-327 !J.g/l 00 g fresh weight (fw) and 302-481 !J.g/100 g fw, for a-tocopherol and total tocopherols, respectively). Glucose and fructose were the main detected free sugars, while total sugars content ranged between O. 160 g and 0.330 g/100 g fw). Oxalic and total organic acids content increased at late harvesting (52 DAS; 8.6 g and 30.3 g/ 100 g fw for oxalic acid and total organic acids, respectively). Regarding the fatty acids content, leaves were abundant in a-linolenic acid (35.4--54.92%), although a decreasing trend was observed with successive harvesting. Oleracein A and C were the major oleracein derivatives detected in leaves, regardless ofthe harvesting stage (values were in the ranges of8.2-103.0 mg and 21.2-143 mg/100 g dried weight (dw) for oleraceins A and C, respectively), while the highest content was recorded at 29 DAS for both compounds. Hepatotoxicity assays showed no toxicity with Gl50 values being higher than 400 !J.g/rnL for all the harvesting stages. ln conclusion, early harvesting could increase the nutritional value of the final product through increasing the content ofvaluable compounds, such as omega-3 fatty acids, phenolic compounds and oleracein derivatives, while at the sarne time, the contents of anti-nutritional compounds such as oxalic acid are reduced.pt_PT
dc.description.sponsorshipThis work was funded by the General Secretariat for Research and Technology of Greece and PRIMA foundation under the project VALUEFARM (Prima2019-11). The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) for financial support through national funds FCT/MCTES to CIMO (UIDB/00690/2020); for the financial support within the scope ofthe Project PRIMA Section 2- Multi-topic 2019: VALUEFARM (PRIMA/0009/2019); and L. Barros, M.l. Dias and Â. Fernandes thank FCT, P.l., through the institutional scientific employment program-contract for their contacts.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationPolyzos, Nikolaos; Fernandes, Ângela; Dias, Maria Inês; Petropoulos, Spyridon A.; Ferreira, Isabel C.F.R.; Barros, Lillian (2021). Nutritional value and chemical composition of purslane leaves in relation to harvest stage. In 1st Natural products application: health, cosmetic and food: book of abstracts. Bragança: Instituto Politécnico. ISBN 978-972-745-286-6pt_PT
dc.identifier.isbn978-972-745-286-6
dc.identifier.urihttp://hdl.handle.net/10198/24919
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationMountain Research Center
dc.relationValueFarm - Valorization of Mediterranean small-scale farms by cropping wild unexploited species
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectPortulaca oleraceae L.pt_PT
dc.titleNutritional value and chemical composition of purslane leaves in relation to harvest stagept_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitleMountain Research Center
oaire.awardTitleValueFarm - Valorization of Mediterranean small-scale farms by cropping wild unexploited species
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UIDB%2F00690%2F2020/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PRIMA%2F0009%2F2019/PT
oaire.citation.titleNatural products application: Health. Cosmetic and Food.pt_PT
oaire.fundingStream6817 - DCRRNI ID
oaire.fundingStream3599-PPCDT
person.familyNameFernandes
person.familyNameDias
person.familyNameFerreira
person.familyNameBarros
person.givenNameÂngela
person.givenNameMaria Inês
person.givenNameIsabel C.F.R.
person.givenNameLillian
person.identifier144781
person.identifier469085
person.identifier.ciencia-id2015-0434-AE7C
person.identifier.ciencia-id2A13-4BE6-C7CF
person.identifier.ciencia-id9418-CF95-9919
person.identifier.ciencia-id9616-35CB-D001
person.identifier.orcid0000-0002-0157-9873
person.identifier.orcid0000-0001-8744-7814
person.identifier.orcid0000-0003-4910-4882
person.identifier.orcid0000-0002-9050-5189
person.identifier.ridM-8242-2013
person.identifier.ridE-8500-2013
person.identifier.ridJ-3600-2013
person.identifier.scopus-author-id54388787000
person.identifier.scopus-author-id36868826600
person.identifier.scopus-author-id35236343600
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
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
relation.isAuthorOfPublication6233e657-3885-40a3-885e-0d51cf4dbaad
relation.isAuthorOfPublication7ca8432b-e7f4-4116-a56e-9eba0d4403bd
relation.isAuthorOfPublicationbd0d1537-2e03-41fb-b27a-140af9c35db8
relation.isAuthorOfPublication3af07ffe-f914-48ba-a5d5-efcf70fdce01
relation.isAuthorOfPublication.latestForDiscovery6233e657-3885-40a3-885e-0d51cf4dbaad
relation.isProjectOfPublication29718e93-4989-42bb-bcbc-4daff3870b25
relation.isProjectOfPublication3021616a-61bc-433d-9374-0376a00f56b9
relation.isProjectOfPublication.latestForDiscovery29718e93-4989-42bb-bcbc-4daff3870b25

Files

Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
6 Poster Nac.pdf
Size:
2.39 MB
Format:
Adobe Portable Document Format
Download

Collections

CIMO - Resumos em Proceedings Não Indexados à WoS/Scopus