Abstract

GONZALEZ-GARCIA, Karla Elizabeth et al. Polyphenols in five varieties of Euphorbia pulcherrima native to Mexico. Rev. Mex. Cienc. Agríc [online]. 2022, vol.13, n.3, pp.433-442.  Epub Aug 08, 2022. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v13i3.2831.

Poinsettia (Euphorbia pulcherrima Willd. ex Klotsch) grows wild in the Mexican tropical forests in a shrubby form and with striking red bracts and less often it has white bracts. The main use of the native poinsettia is ornamental, little has been studied about the nutritional or nutraceutical properties of the plant. The objective of the present study was to determine the profile of flavonoids and phenolic acids present in the methanolic-aqueous extracts in bracts of five varieties of sun poinsettia in order to know their nutritional properties and promote their consumption. Dry bracts (0.5 g per sample) were used. The extraction of the compounds was done from a solution of methanol/water (80:20 v/v). A profile of phenolic acids and flavonoids was made by high-performance liquid chromatography (HPLC) coupled to a diode-array detector. Gallic and syringic acids were the ones that had the highest concentrations in the varieties analyzed. The flavonoid rutin was found in high concentrations in all varieties, however, in the Juan Pablo variety, it was not possible to detect phlorizin and phloretin. These results suggest that poinsettia bracts may provide important antioxidants when consumed.

Keywords : euphorbiaceae; flavonoids; HPLC; phenolic acids.

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