Resumen

MANZANO SANTANA, Patricia et al. Some pharmacognostic parameters of native Vernonanthura patens (Kunth) H. Rob. (Asteraceae) from Ecuador. Rev Cubana Plant Med [online]. 2013, vol.18, n.1, pp. 131-139. ISSN 1028-4796.

Introduction: Vernonanthura patens (Kunth) H. Rob., a native shrub from South America, grows wild in southern Ecuador. The people of Canton Marcabelí, El Oro province, know it as "laritaco" and use aqueous brews of the leaves to wash and heal wounds, to soothe headaches, to reduce inflammation, to soothe coughs and to combat certain types of cancer. Preliminary biological research studies have shown good antimalarial and antileishmanial activity. However, there is no history of other pharmacological or chemical studies about the species. Objective: to determine the quality parameters of the flowers, leaves and branches of the species in the fructification stage as well as to determine the secondary metabolites present through the phytochemical screening. Methods: the plant was harvested in mature state, at time of flowering; the parts of the plant were dried in an oven and then milled to 2 mm particle size. The indexes were determined according to NRSP 309, 1992 and phytochemical screening was performed according to Miranda and Cuellar's analytical methodology 2000. Basic summary statistics was used to determine the statistical data behavior (measures of central tendency and dispersion). To obtain significant statistical differences, the variance analysis and Tukey post-test were used. The multivariate analysis of main components served to determine, through a biplot, the multivariate relationships among the study parameters. For this analysis, the 2010 InfoStat Software version of Group InfoStat FCA, National University of Cordoba, Argentina was the choice. Results: significant differences were found for some numeric indexes and in the results of phytochemical screening among the different vegetative organs. Conclusions: the flowers generally have a higher percentage of water -and alcohol- soluble substances, less residual moisture and are richer in secondary metabolites than the leaves and the stalks.

Palabras clave : Vernonanthura pathens; laritaco; pharmacognitive parameters.

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