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Polyphenolic and biological activities of leaves extracts of Argemone subfusiformis (Papaveraceae) and Urtica urens (Urticaceae)

dc.creatorJimoh, Florence
dc.creatorAdedapo, Adeolu A.
dc.creatorAliero, Adamu
dc.creatorAfolayan, Anthony Jide
dc.date2009-08-31
dc.date.accessioned2016-05-03T15:30:57Z
dc.date.available2016-05-03T15:30:57Z
dc.identifierhttp://revistas.ucr.ac.cr/index.php/rbt/article/view/5428
dc.identifier10.15517/rbt.v58i4.5428
dc.identifier.urihttp://hdl.handle.net/10669/26972
dc.descriptionNowadays there is a resurgence of interest in wild plants for their possible medicinal value in diets, since some epidemiological studies have demonstrated their effectiveness against important diseases. Generally, foods of plant origin contain many bioactive compounds, proteins, energy, vitamins and specific minerals; in addition, the popular wild plant species provide fibre, essential fatty acids and enhance the taste and colour in diets. We studied the nutritional and medicinal potential of leaves of A. subfusiformis and U. urens, collected in Alice, South Africa in November 2006. To asses this we analyzed the phytochemical, antioxidant and antibacterial activities of leaves in acetone, methanol and water extracts, using standard analytical methods. The proximate analysis showed that the leaves of both plant species contained appreciable percentages of moisture; ashes; carbohydrates; crude proteins, lipids and fibres. Elemental analysis of macro and microelements showed higher values for U. urens that contained in decreasing order: iron > manganese > zinc > copper > calcium > potassi um > nitrogen > magnesium > phosphorus > sodium, for A. subfusiformis resulted in iron > zinc > manganese > coppe r > calcium > potassium > nitrogen > magnesium > phosphorus > sodium. Besides, the chemical composition showed higher concentration of alkaloids, saponins and phytates in A. subfusiformis. The extracts also caused 1, 1- diphenyl-2-picrylhydrazyl (DPPH) and 2, 2-azinobis-3 ethylbenzothiazoline-6-sulfonic acid (ABTS) radical scavenging activities which were comparable to those of ascorbic acid. The extracts of both plants contained appreciable levels of polyphenols and also caused varied inhibition of some bacterial strains used in this study. When the nutrient and chemical constituents of these plants were compared with recommended dietary allowance (RDA) values, the results revealed that the leaves contain an appreciable amount of nutrients, minerals, and phytochemicals and low levels of toxicants. Since the plants also exhibited some level of antibacterial activities, their use for medicinal purposes is to some extent being justified.en-US
dc.formatapplication/pdf
dc.languageenges_ES
dc.publisherUniversidad de Costa Ricaes_ES
dc.rightsCopyright (c) 2014 International Journal of Tropical Biology and Conservationes_ES
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 58 (4) December 2010en-US
dc.sourceRevista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 58 (4) December 2010es-ES
dc.sourceRevista Biología Tropical; Vol. 58 (4) December 2010pt-PT
dc.source2215-2075
dc.source0034-7744
dc.source10.15517/rbt.v58i4
dc.titlePolyphenolic and biological activities of leaves extracts of Argemone subfusiformis (Papaveraceae) and Urtica urens (Urticaceae)en-US
dc.titlePolyphenolic and biological activities of leaves extracts of Argemone subfusiformis (Papaveraceae) and Urtica urens (Urticaceae)es-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion
dc.coverageCRCes_ES


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