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Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part

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dc.contributor.authorPetropoulos, Spyridon Α.
dc.contributor.authorFernandes, Ângela
dc.contributor.authorDias, Maria Inês
dc.contributor.authorVasilakoglou, Ioannis B.
dc.contributor.authorPetrotos, Konstantinos
dc.contributor.authorBarros, Lillian
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2018-02-19T10:00:00Z
dc.date.accessioned2020-01-06T14:10:29Z
dc.date.available2018-01-19T10:00:00Z
dc.date.available2020-01-06T14:10:29Z
dc.date.issued2019
dc.description.abstractPurslane (Portulaca oleraceae L.) is a widespread weed, which is highly appreciated for its high nutritional value with particular reference to the content in omega-3 fatty acids. In the present study, the nutritional value and chemical composition of purslane plants in relation to plant part and harvesting stage were evaluated. Plants were harvested at three growth stages (29, 43 and 52 days after sowing (DAS)), while the edible aerial parts were separated into stems and leaves. Leaves contained higher amounts of macronutrients than stems, especially at 52 DAS. -tocopherol was the main isoform, which increased at 52 DAS, as well total tocopherols (values were in the ranges of 197–327 g/100 g fresh weight (fw) and 302–481 g/100 g fw, for -tocopherol and total tocopherols, respectively). Glucose and fructose were the main free sugars in stems and leaves, respectively, whereas stems contained higher amounts of total sugars (values were ranged between 0.83 g and 1.28 g/100 g fw). Oxalic and total organic acid content was higher in leaves, especially at the last harvesting stage (52 DAS; 8.6 g and 30.3 g/100 g fw for oxalic acid and total organic acids, respectively). Regarding the fatty acid content, stems contained mainly palmitic (20.2–21.8%) and linoleic acid (23.02–27.11%), while leaves were abundant in -linolenic acid (35.4–54.92%). Oleracein A and C were the major oleracein derivatives in leaves, regardless of the harvesting stage (values were in the ranges of 8.2–103.0 mg and 21.2–143 mg/100 g dried weight (dw) for oleraceins A and C, respectively). Cytotoxicity assays showed no hepatotoxicity, with GI50 values being higher than 400 g/mL for all the harvesting stages and plant parts. In conclusion, early harvesting and the separation of plant parts could increase the nutritional value of the final product through increasing the content of valuable compounds, such as omega-3 fatty acids, phenolic compounds and oleracein derivatives, while at the same time, the contents of anti-nutritional compounds such as oxalic acid are reduced.
dc.description.sponsorshipThe authors are grateful to the Foundation for Science and Technology FCT, Portugal and FEDER under Programme PT2020 for financial support to CIMO (UID/AGR/00690/2019). Â.F., M.I.D., and L.B. thank the national funding by FCT, P.I., through the institutional scientific employment program-contract for their contracts. The authors are also grateful to the FEDER-Interreg España-Portugal program for financial support through the project 0377_Iberphenol_6_E.
dc.description.versioninfo:eu-repo/semantics/publishedVersionen_EN
dc.identifier.citationPetropoulos, Spyridon A.; Fernandes, Ângela; Dias, Maria Inês; Vasilakoglou, Ioannis B.; Petrotos, Konstantinos; Barros, Lillian; Ferreira, Isabel C.F.R. (2019). Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part. Antioxidants. ISSN 2076-3921. 8, p. 1-15en_EN
dc.identifier.doi10.3390/antiox8080293en_EN
dc.identifier.urihttp://hdl.handle.net/10198/20276
dc.language.isoeng
dc.peerreviewedyesen_EN
dc.subjectFatty acidsen_EN
dc.subjectHepatotoxicityen_EN
dc.subjectOleracein derivativesen_EN
dc.subjectOmega-3 fatty acidsen_EN
dc.subjectPhenolic compoundsen_EN
dc.subjectPortulaca oleraceaeen_EN
dc.subjectPurslaneen_EN
dc.subjectTocopherolsen_EN
dc.subjectα-linolenic aciden_EN
dc.titleNutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant parten_EN
dc.typejournal article
dspace.entity.typePublication
person.familyNameFernandes
person.familyNameDias
person.familyNameBarros
person.familyNameFerreira
person.givenNameÂngela
person.givenNameMaria Inês
person.givenNameLillian
person.givenNameIsabel C.F.R.
person.identifier469085
person.identifier144781
person.identifier.ciencia-id2015-0434-AE7C
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person.identifier.ciencia-id9616-35CB-D001
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0002-0157-9873
person.identifier.orcid0000-0001-8744-7814
person.identifier.orcid0000-0002-9050-5189
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-id36868826600
rcaap.rightsopenAccessen_EN
rcaap.typearticleen_EN
relation.isAuthorOfPublication6233e657-3885-40a3-885e-0d51cf4dbaad
relation.isAuthorOfPublication7ca8432b-e7f4-4116-a56e-9eba0d4403bd
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