Phytochemical characterization and radical scavenging activity of Portulaca oleraceae L. leaves and stems

Oliveira, Ivo; Valentão, Patrı́cia; Lopes, Rosário; Andrade, Paula B.; Bento, Albino; Pereira, José Alberto

doi:10.1016/j.microc.2009.02.006

Cited by 117 publications

(100 citation statements)

References 32 publications

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“…In contrast, Oliveira et al [7] reported higher percentages for SFAs than those for PUFAs for all the tested ecotypes, apart from one where PUFAs and SFAs were detected at similar amounts, whereas the omega-6: omega-3 ratio was significantly lower (0.14-0.28) compared to our study. These differences could be possibly due to genotype, the plant part and the harvest stage, since the samples were collected in situ without more available information about the growth stage of the plants when collected.…”

Section: Resultscontrasting

confidence: 99%

“…Genotype D had the highest relative percentage in alpha-linolenic acid. Oliveira et al [7] have reported the same fatty acids to be the most abundant, however they detected significantly lower percentages for linoleic acid (4.00-6.31%) compared to our study (25.09-32.90%). This difference may be attributed to the fact that they analysed the leaves separately from the stems, whereas in our study the results refer to whole plants (stems and leaves) since they are both edible, as well as to different genotype and growing conditions.…”

Section: Resultscontrasting

confidence: 94%

“…Furthermore, Oliveira et al [7] reported that oxalic acid content in purslane showed a significant negative linear correlation with antioxidant activity.…”

mentioning

confidence: 99%

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Chemical Composition and Yield of Six Genotypes of Common Purslane (Portulaca oleracea L.): An Alternative Source of Omega-3 Fatty Acids

Petropoulos

Karkanis

Fernandes

et al. 2015

Plant Foods Hum Nutr

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Common purslane (Portulaca oleracea L.) is an annual weed rich in omega-3 fatty acids which is consumed for its edible leaves and stems. In the present study six different genotypes of common purslane (A-F) were evaluated for their nutritional value and chemical composition. Nutritional value and chemical composition depended on genotype. Oxalic acid content was the lowest for genotype D, whereas genotypes E and F are more promising for commercial cultivation, since they have low oxalic acid content. Genotype E had a very good antioxidant profile and a balanced composition of omega-3 and omega-6 fatty acids. Regarding yield, genotype A had the highest yield comparing to the other genotypes, whereas commercial varieties (E and F) did not differ from genotypes B and C. This study provides new information regarding common purslane bioactive compounds as affected by genotype and could be further implemented in food industry for products of high quality and increased added value.

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Section: Resultscontrasting

confidence: 99%

Section: Resultscontrasting

confidence: 94%

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Chemical Composition and Yield of Six Genotypes of Common Purslane (Portulaca oleracea L.): An Alternative Source of Omega-3 Fatty Acids

Petropoulos

Karkanis

Fernandes

et al. 2015

Plant Foods Hum Nutr

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“…These results confirm previous data on the antioxidative properties of purslane extract in other tissues, including heart, where it was shown to increase SOD activity (Caballero-Salazar et al, 2002;Hongxing et al, 2007). Purslane has been classically characterized as an antioxidant (Dkhil et al, 2011), and is involved in the direct detoxification of rotenones, mediated by two flavonols and flavones present in purslane (Cai et al, 2004;Oliveira et al, 2009). Purslane also effectively detoxifies superoxide, either by superoxide dismutation or by directly reacting with it (Siriamornpun & Suttajit, 2010).…”

Section: Discussionsupporting

confidence: 90%

Hepatoprotective effects ofPortulaca oleraceaextract against CCl₄-induced damage in rats

Eidi

Mortazavi

Moghadam

et al. 2014

Pharmaceutical Biology

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Context: Purslane (Portulaca oleracea L., Portulacaceae) has been traditionally used in folk medicine to afford protection against liver injury, although its actual efficacy remains uncertain. Objective: To evaluate purslane as a hepatoprotective agent, we investigated the protective effect of its ethanol extract against carbon tetrachloride (CCl 4 )-induced hepatic toxicity in rats. Materials and methods: A total of 108 male Wistar rats were randomly divided into 12 groups. The first group was maintained as normal control, whereas CCl 4 (0.5 ml/kg bw, 50% CCl 4 in olive oil, i.p.), purslane extract (0.005, 0.01, 0.05, 0.1, and 0.15 g/kg bw, intragastrically), and purslane extract (five doses as above) along with CCl 4 were administered to the Groups II, III-VII, and VIII-XII, respectively. The rats were sacrificed on the 30th day, and blood was withdrawn by cardiac puncture. Liver damage was assessed by measuring hepatic marker enzymes (ALT, AST, ALP, GGT, and SOD) and histopathological observation. Results: Treatment with CCl 4 resulted in increased serum activities of marker enzymes with a concomitant decrease in SOD. Histological alterations were also observed in the liver tissue upon CCl 4 treatment. Administration of purslane extract (0.01, 0.05, 0.1, and 0.15 g/kg b.w.) significantly showed a marked tendency towards normalization of all measured biochemical parameters in CCl 4 -treated rats. Histopathological changes also paralleled the detected alteration in markers of liver function. Discussion and conclusion: These results demonstrate that purslane exerts protective effects against CCl 4 -induced damage in rat liver and supports a potential therapeutic use of purslane as an alternative for patients with liver diseases.

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“…and the leaves of Portulaca oleracea L. have the highest moisture content (ranging from 91.8 to 93.4 g/100 g) (Cowan et al, 1963;García-Herrera et al, 2014b;García Herrera, 2014;Oliveira et al, 2009;Pereira et al, 2011;Pinela et al, 2016a;Tardío et al, 2011). These plants are usually consumed raw in salads, sautéed or cooked (Table 1).…”

Section: Proximate Compositionmentioning

confidence: 99%

Wild edible plants: Nutritional and toxicological characteristics, retrieval strategies and importance for today's society

Pinela

Ferreira

2017

Food and Chemical Toxicology

146

111

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A B S T R A C TWild edible plants (WEPs) are part of the cultural and genetic heritage of different regions of the world. In times of famine and scarcity, these sources of nutrients and health-promoting compounds have received high importance mainly in rural and suburban areas. Although currently underutilized, WEPs are still consumed traditionally by different communities and are gaining relevance in today's society. However, these foods lack recognition as significant contributors to the human diet in developed areas. This review describes the nutritional value of WEPs from the North-eastern region of Portugal and points out those containing potentially toxic compounds. Several retrieval strategies are presented with the aim of promoting the (re)use, production, commercialization and conservation of WEPs (wild harvested plants and crop wild relatives), and their importance for social, economic and agro-ecological development is highlighted.

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Phytochemical characterization and radical scavenging activity of Portulaca oleraceae L. leaves and stems

Cited by 117 publications

References 32 publications

Chemical Composition and Yield of Six Genotypes of Common Purslane (Portulaca oleracea L.): An Alternative Source of Omega-3 Fatty Acids

Chemical Composition and Yield of Six Genotypes of Common Purslane (Portulaca oleracea L.): An Alternative Source of Omega-3 Fatty Acids

Hepatoprotective effects ofPortulaca oleraceaextract against CCl₄-induced damage in rats

Wild edible plants: Nutritional and toxicological characteristics, retrieval strategies and importance for today's society

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Phytochemical characterization and radical scavenging activity of Portulaca oleraceae L. leaves and stems

Cited by 117 publications

References 32 publications

Chemical Composition and Yield of Six Genotypes of Common Purslane (Portulaca oleracea L.): An Alternative Source of Omega-3 Fatty Acids

Chemical Composition and Yield of Six Genotypes of Common Purslane (Portulaca oleracea L.): An Alternative Source of Omega-3 Fatty Acids

Hepatoprotective effects ofPortulaca oleraceaextract against CCl4-induced damage in rats

Wild edible plants: Nutritional and toxicological characteristics, retrieval strategies and importance for today's society

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Product

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Hepatoprotective effects ofPortulaca oleraceaextract against CCl₄-induced damage in rats