Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10198/20276 |
Resumo: | Purslane (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. |
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Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant partFatty acidsHepatotoxicityOleracein derivativesOmega-3 fatty acidsPhenolic compoundsPortulaca oleraceaePurslaneTocopherolsα-linolenic acidPurslane (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.The 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.Biblioteca Digital do IPBPetropoulos, Spyridon Α.Fernandes, ÂngelaDias, Maria InêsVasilakoglou, Ioannis B.Petrotos, KonstantinosBarros, LillianFerreira, Isabel C.F.R.2018-01-19T10:00:00Z20192019-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10198/20276engPetropoulos, 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. 1-1510.3390/antiox8080293info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-11-21T10:46:12Zoai:bibliotecadigital.ipb.pt:10198/20276Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T23:11:04.082723Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
title |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
spellingShingle |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part Petropoulos, Spyridon Α. Fatty acids Hepatotoxicity Oleracein derivatives Omega-3 fatty acids Phenolic compounds Portulaca oleraceae Purslane Tocopherols α-linolenic acid |
title_short |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
title_full |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
title_fullStr |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
title_full_unstemmed |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
title_sort |
Nutritional value, chemical composition and cytotoxic properties of common purslane (Portulaca oleracea L.) in relation to harvesting stage and plant part |
author |
Petropoulos, Spyridon Α. |
author_facet |
Petropoulos, Spyridon Α. Fernandes, Ângela Dias, Maria Inês Vasilakoglou, Ioannis B. Petrotos, Konstantinos Barros, Lillian Ferreira, Isabel C.F.R. |
author_role |
author |
author2 |
Fernandes, Ângela Dias, Maria Inês Vasilakoglou, Ioannis B. Petrotos, Konstantinos Barros, Lillian Ferreira, Isabel C.F.R. |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Biblioteca Digital do IPB |
dc.contributor.author.fl_str_mv |
Petropoulos, Spyridon Α. Fernandes, Ângela Dias, Maria Inês Vasilakoglou, Ioannis B. Petrotos, Konstantinos Barros, Lillian Ferreira, Isabel C.F.R. |
dc.subject.por.fl_str_mv |
Fatty acids Hepatotoxicity Oleracein derivatives Omega-3 fatty acids Phenolic compounds Portulaca oleraceae Purslane Tocopherols α-linolenic acid |
topic |
Fatty acids Hepatotoxicity Oleracein derivatives Omega-3 fatty acids Phenolic compounds Portulaca oleraceae Purslane Tocopherols α-linolenic acid |
description |
Purslane (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. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-19T10:00:00Z 2019 2019-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10198/20276 |
url |
http://hdl.handle.net/10198/20276 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Petropoulos, 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. 1-15 10.3390/antiox8080293 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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