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Revista Cubana de Plantas Medicinales

versión On-line ISSN 1028-4796

Resumen

RINCON AGUILAR, Carlos Mario et al. Preliminary chemical study and evaluation of antioxidant, antifeedant and toxic activity of the species Pernettya prostrata (Ericaceae). Rev Cubana Plant Med [online]. 2014, vol.19, n.2, pp.138-150. ISSN 1028-4796.

Introduction: studies about the phytochemistry and biological properties of the species Pernettya prostrata (Cav.) DC. (Ericaceae) conducted so far have been preliminary and many of the results published are not totally reliable. Therefore, the plant is an interesting and promising object of study. Objective:carry out the preliminary phytochemical analysis and evaluation of some biological properties of extracts and fractions of P. prostrata. Methods: preliminary phytochemical analysis was conducted of ethanolic extracts from the aerial parts and fruits for determination of possible constituents. Antioxidant activity was evaluated by DPPH free radical capture. Toxic activity against Artemia salina and antifeedant activity against Sitophilus zeamais and Tribolium castaneum were also determined. Results: preliminary phytochemical tests suggest the presence of flavonoids, tannins, triterpenes and/or steroids in ethanolic extracts from fruits and aerial parts of P. prostrata. Squalene and β-1-O-methoxy-glucopyranose were isolated and identified from the phytochemical study of the fruit ethanolic extract. The compounds isolated and identified did not reveal any promising results in the biological assays performed. Ethanolic extracts from fruits (72.8 ppm) and aerial parts (60.9 ppm) exhibited similar antioxidant activity. The methanolic fraction showed the highest antioxidant activity with IC 50 (86.2 ± 8.8 ppm) and IP (89.8 %), greater than those in the ascorbic acid used as a standard (IC50 = 49.3 ± 0.2 ppm). No toxic or antifeedant activity was found in the extracts and fractions evaluated. Conclusions: the present paper makes a contribution to knowledge about the chemical composition and biological properties of the species P. prostrata through isolation and identification of two new substances, and determination of the antioxidant activity of some extracts and fractions.

Palabras clave : Ericaceae; Pernettya; Pernettya prostrata; preliminary phytochemical analysis; toxic activity; antifeedant activity; antioxidant activity; squalene; -1-O-methoxy-glucopyranose.

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