Análise fitoquímica da espécie Allamanda blanchetti (Apocynaceae)

Abstract

Over the years, the use of plants in the medical field has become very frequent, since the search for alternative treatment for some diseases has proved to be something very accessible, because they have effective pharmacological properties in the fight against various diseases. Secondary metabolites isolated from plants have also been used as intermediates / models for drug synthesis. Allamanda blanchetti (Apocynaceae), is a plant of perennial leaves and flowers of pink or purple colour, used as ornament in gardens, is considered a medicinal plant, being used in the treatment of diseases of the digestive and nervous systems, for example, but its therapeutic use has not been much studied. Research carried out with the ethanolic extract of this plant has indicated that these can act in the fight of existing fungi in some plant species, replacing the use of agrotoxics. This work aims to perform a phytochemical analysis of extracts of ethanolic extracts from the leaves and stem of Allamanda blanchetti. The plant material was collected in the city of Parnaíba, located in northern Piauí. The phytochemical evaluation was by means of tests, which consisted of precipitation reactions, foam formation and variation in coloration, and it was possible to suggest the presence of condensed tannins, xanthones, saponins, alkaloids, steroids, and dihydroflavonois in both ethanolic extracts, being verified the presence of flavonoids and flavonones only in EEC.