
handle: 10495/7882
RESUMEN: las frutas y vegetales desempeñan un papel importante en la dieta humana, lo cual se atribuye al hecho de que estos alimentos proveen una mezcla óptima de antioxidantes como la vitamina C y E, polifenoles y carotenoides, que otorgan beneficios para la protección de la salud. Objetivos: evaluar la capacidad antioxidante, el poder reductor y el contenido de fenoles totales de extractos de algunas frutas y hojas del género Passiflora pertenecientes al departamento de Huila. Métodos: la capacidad antioxidante fue medida como la habilidad para atrapar el radical 2.2-difenil-1-picril hidrazilo (DPPH) y 2'-azino-bis (3-etilbenztiazolin-6-sulfonato de amonio (ABTS'+), el potencial para reducir el hierro (FRAP) y, finalmente, el contenido de fenoles totales se determinó mediante el ensayo del reactivo de Folin-Ciocalteu. Resultados: todos los extractos presentaron diferentes grados de capacidad antioxidante. Sin embargo, los extractos de las hojas exhiben mayor capacidad antioxidante que los extractos de las frutas. Estas variaciones pueden deberse a un alto contenido de agentes reductores, como el ácido ascórbico, minerales y carotenoides, factores genéticos y ambientales de las especies. Conclusiones: se evidenció la presencia de sustancias antioxidantes en los frutos y en los sustratos provenientes de las hojas de algunas especies del género Passiflora. Específicamente, se encontraron valores significativos para los frutos de granadilla silvestre y para las hojas de gulupa.
ABSTRACT: Fruits and vegetables play an important role in the human diet because these foods provide an optimal mix of antioxidants like vitamins C and E, polyphenols and carotenoids which is beneficial for health protection. Objectives: To evaluate the antioxidant capacity, the reducing power and the content of total phenols of some fruit and leaf extracts of Passiflora genus in Huila department. Methods: The antioxidant capacity was measured as the ability to catch the radical 2.2-diphenyl-1-picryl hydrazil (DPPH) and 2'-azino-bis (3-ethylbenzatiazolin-6-ammonium sulphonate (ABTS'+), the ferric reducing antioxidant power (FRAP) and total phenol content were determined using Folin-Ciocalteu´s reagent trial. Results: The extracts demonstrated different degrees of antioxidant capacity. However, leaf extracts exhibited higher antioxidant capacity than the fruit extracts. These variations may be due to high content of reducing agents such as ascorbic acid, minerals and carotenoids, and to genetic and environmental factors of the species. Conclusions: The presence of antioxidants in fruits and substrates from the leaves of some species of Passiflora genus was evinced, especially high significant values were found in wild granadilla fruits and in gulupa leaves.
Frutos (Botánica), Hojas (Botánica), Leaves (Botany), Passiflora, Fruits (Botany), 610, Free radicals (Chemistry), Passifloraceas, Natural antioxidants, Radicales libres (Química), Antioxidantes naturales
Frutos (Botánica), Hojas (Botánica), Leaves (Botany), Passiflora, Fruits (Botany), 610, Free radicals (Chemistry), Passifloraceas, Natural antioxidants, Radicales libres (Química), Antioxidantes naturales
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