Abstract

MARTINEZ-LOPEZ, José Nabor et al. Phenolic compounds and antiradical capacity of five wild accessions of Portulaca oleracea L. obtained with three solvents. Rev. Mex. Cienc. Agríc [online]. 2021, vol.12, n.6, pp.1020-1030.  Epub Mar 21, 2022. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v12i6.2729.

Purslane (Portulaca oleracea L.) is a species recognized for its high levels of bioactive compounds, among which the compounds with antioxidant properties stand out. The objective of the work was to determine the variation of phenolic metabolites and their antiradical capabilities in wild accessions of P. oleracea. The research was conducted with samples from five municipalities in Tamaulipas, Mexico collected in October 2018. The contents of total phenolic compounds (CFT) and free radical scavenging capacity against ABTS (2,2’-azino-bis- (3-ethylbenzothiazoline-6-sulfonic) acid) and DPPH (2,2-diphenyl-1-picrylhydracyl) were determined. Extractions were made from vegetative parts using three solvents: acetone, water and ethanol. The accession of the localities of Abasolo and Padilla were the ones that had the highest amount of CFT with 5.8938 ±0.03 and 5.3742 ±0.11 mEAG g-1 PS, respectively, using water in the extraction. Regarding the free radical scavenging capacity against ABTS, the accession of Abasolo and Jiménez recorded the highest values, with 3.27 ±0.06 and 3.2226 ±0.04 mM ET g-1 PS. Regarding the level against DPPH radicals, the accession of Abasolo was the highest with 2.0204 ±0.05 mM ET g-1 PS, using water in the extraction. Water was the best solvent for the extraction of the determined contents. Heterogeneity was observed in the composition and levels of the parameters evaluated among the accessions. Wild P. oleracea accessions represent reservoirs of phenolic compounds and free radical scavenging capacity, including cultivated and wild varieties.

Keywords : antioxidants; edible plant; phytochemical variation.