ANTIOXIDANT POTENTIAL OF SOME SPECIES OF THE GENUS Bomarea (ALSTROEMERIACEAE)
Keywords:Antioxidant, <I>Bomarea</I>, DPPH, Folin-Ciocalteau, plant TBARS.
This work evaluated the antioxidant activity of ethanol extracts from 11 species of the genus Bomarea (Alstroemeriaceae) by means of two in vitro methods. Values of CE50 between 51 and 333 μg/mL were obtained for DPPH the test, and the highest activity levels were found for B. glaucescens, B. setacea, B. pardina and B. euryantha, which presented a similar CE50 or lower than the reference used, silymarin (70.6 μg/mL). Likewise, the TBARS method showed that the maximum inhibition of lipid peroxidation of the linoleic acid was produced by B. hirsuta (malondialdehyde = 0.429 μM), followed by B. bredemeyerana (0.474 μM), B. callejasiana (0.479 μM), B. euryantha (0.489 μM), B. glaberrima (0.497 μM), and B. setacea (0.500 μM). Additionally, the concentration of phenol compounds was evaluated by the Folin-Ciocalteau method, finding that B. setacea presented the highest content of these (159.75 gallic acid equivalents/mg of extract). Bomarea setacea showed the highest antioxidant properties demonstrated by its free-radical scavenging and significant inhibition capacity of the oxidation of linoleic acid.
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