Pharmacognostic and evaluation of antioxidant capacity of rambutan fruits

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J Pharm Pharmacogn Res 8(1): 64-77, 2020. DOI: https://doi.org/10.56499/jppres19.701_8.1.64 Original Article Pharmacognostic study and evaluation of the antioxidant capacity of the fruit of two varieties of Nephelium lappaceum L. (Sapindaceae), (rambutan) [Estudio farmacognóstico y evaluación de la capacidad antioxidante de los frutos de dos variedades de Nephelium lappaceum L. (rambutan)] Laura L. Valdez López1, Iván A. Chóez … Continue reading Pharmacognostic and evaluation of antioxidant capacity of rambutan fruits

J Pharm Pharmacogn Res 8(1): 64-77, 2020.

DOI: https://doi.org/10.56499/jppres19.701_8.1.64

Original Article

Pharmacognostic study and evaluation of the antioxidant capacity of the fruit of two varieties of Nephelium lappaceum L. (Sapindaceae), (rambutan)

[Estudio farmacognóstico y evaluación de la capacidad antioxidante de los frutos de dos variedades de Nephelium lappaceum L. (rambutan)]

Laura L. Valdez López1, Iván A. Chóez Guaranda2, Gabriela A. Carrillo Lavid1, Migdalia Miranda Martínez3*

1Universidad de Guayaquil. Facultad de Ciencias Químicas. Ciudadela Universitaria “Salvador Allende”. Ave. Kennedy S/N y Av. Delta. Guayaquil. Ecuador.
2ESPOL PolytechnicUniversity, Escuela Superior Politécnica del Litoral, ESPOL, Centro de Investigaciones Biotecnológicas del Ecuador, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863. Guayaquil, Ecuador.
3ESPOL PolytechnicUniversity, Escuela Superior Politécnica del Litoral, ESPOL, Departamento de Ciencias Químicas y Ambientales. Facultad de Ciencias Naturales y Matemáticas, Campus Gustavo Galindo Km. 30.5 Vía Perimetral, P.O. Box 09-01-5863. Guayaquil, Ecuador.
Abstract

Context: Nephelium lappaceum (achotillo or rambutam), is a fruit native to Malaysia and Indonesia introduced in Ecuador for consumption purposes.

Aims: To identify the bioactive metabolites present in the peels and seeds of the sweet and bitter varieties of rambutan fruits and their antioxidant capacity.

Methods: It was performed through a pharmacognostic analysis of the peels of the fruits, based on the evaluation of the physicochemical parameters, the phytochemical analysis, the quantification of the phenols and flavonoids, the determination of the antioxidant capacity and the identification of the fatty compounds present in the seeds by gas chromatography coupled to mass spectrometry.

Results: The results showed that both the peels and the seeds of the two varieties differ in the content of phyto-constituents and antioxidant properties.

Conclusions: The bitter fruit presented a higher concentration of phenols and flavonoids in the peels and a higher concentration of fatty compounds in the seeds, with marked differences between the fractions of the non-saponifiable compounds. For the fatty acid fraction, a greater qualitative similarity was evidenced, with quantitative differences. Although the peels extract of both fruits have antioxidant capacity, it was significantly higher in bitter fruits.

Keywords: antioxidant; fatty compounds; fruit peels; phenolic compounds; seeds.

Resumen

Contexto: Nepheliumlappaceum (achotillo o rambutam), es una fruta originaria de Malasia e Indonesia introducida en Ecuador con fines de consumo.

Objetivos: Identificar los metabolitos bioactivos presentes en la corteza y semillas de las variedades dulce y amargas del fruto del rambután y su capacidad antioxidante.

Métodos: Se realizó a través de un análisis farmacognóstico de la corteza de los frutos, basado en la evaluación de los parámetros fisicoquímicos, el análisis fitoquímico, la cuantificación de los fenoles y flavonoides, la determinación de la capacidad antioxidante y la identificación de los compuestos grasos presentes en las semillas mediante cromatografía de gases acoplada a espectrometría de masas.

Resultados: Los resultados mostraron que tanto las cortezas como las semillas de las dos variedades difieren en el contenido de fitoconstituyentes y sus propiedades antioxidantes.

Conclusiones: Los frutos amargos presentaron una mayor concentración de fenoles y flavonoides en la corteza y una mayor concentración de compuestos grasos en las semillas, con marcadas diferencias entre las fracciones de los compuestos no saponificables. Para la fracción de ácidos grasos, se evidenció una mayor similitud cualitativa, con diferencias cuantitativas. Aunque los extractos de la corteza de ambos frutos tienen capacidad antioxidante, fue significativamente mayor en los frutos amargos.

Palabras Clave: antioxidante; compuestos fenólicos; compuestos grasos; corteza de fruto; semillas.

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Citation Format: Valdez LL, Chóez IA, Carrillo GA, Miranda M (2020) Pharmacognostic study and evaluation of the antioxidant capacity of the fruit of two varieties of Nephelium lappaceum L. (Sapindaceae), (rambutan). J Pharm Pharmacogn Res 8(1): 64–77. DOI: https://doi.org/10.56499/jppres19.701_8.1.64

© 2020 Journal of Pharmacy & Pharmacognosy Research (JPPRes)

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