Nutritional assessment, phytochemical composition and antioxidant analysis of the pulp and seed of medjool date grown in Mexico

PeerJ

article

Ricardo Salomón-Torres¹  Noé Ortiz-Uribe¹  Benjamín Valdez-Salas²  Navor Rosas-González²  Conrado García-González³  Daniel Chávez⁴  Iván Córdova-Guerrero⁵  Laura Díaz-Rubio⁵  María del Pilar Haro-Vázquez⁵  José Luis Mijangos-Montiel⁵  Antonio Morales-Maza⁶  Padmanabhan Mahadevan⁷  Robert Krueger⁸ 

[1] Departamento de Posgrado, Universidad Estatal de Sonora;Laboratorio de Materiales Avanzados, Universidad Autónoma de Baja California;Laboratorio de Procesos Industriales, Universidad Autónoma de Baja California;Centro de Graduados e Investigación en Química, Instituto Tecnológico de Tijuana;Facultad de Ciencias Químicas e Ingeniería, Universidad Autónoma de Baja California;Instituto Nacional de Investigaciones Forestales;University of Tampa;National Clonal Germplasm Repository for Citrus and Dates

关键词: Date palm;    Phoenix dactylifera L.;    Medjool;    Fatty acid;    Antioxidant activities;    Chemical composition;    Minerals;    Seed date;    Mexico;   

DOI  :  10.7717/peerj.6821

学科分类：社会科学、人文和艺术（综合）

来源: Inra

【 摘 要 】

The aim of this study was the characterization of fatty acids, antioxidant activity, some physical properties, nutrient content, sugars, and minerals in the pulp and seeds of the date cultivar ‘Medjool’ (Phoenix dactylifera L.) grown in Mexico. The samples were obtained at maturity (Tamar) in the 2017 harvest season in the valleys of San Luis Rio Colorado and Mexicali, Mexico. The following average values were obtained on a % dry weight basis for pulp and seeds, respectively: protein, 3.14% and 4.84%; lipids, 0.75% and 9.94%; fiber, 6.34% and 66.79%; total sugars, 75.32% and 5.88%; reducing sugars, 70.26% and 4.40%; and sucrose, 5.06% and 1.46%. Analysis of the minerals revealed that the most abundant elements for the pulp were: potassium, 851.98 mg/100 g; magnesium, 142.97 mg/100 g; and phosphorus, 139.40 mg/100 g, whereas for the seeds, they were potassium, 413.36 mg/100 g; sulfur, 151.36 mg/100 g; and phosphorus, 92.42 mg/100 g. Gas chromatography-mass spectrometry analysis revealed that the major unsaturated fatty acid was oleic acid, at 52.34% and 45.92%, respectively, for pulp and seeds. The main saturated fatty acids were palmitic acid (6.75%) and lauric acid (17.24%) in pulp and seeds, respectively. The total phenolic content was 1.16 and 13.73 mg GAE/100 g for pulp and seeds, respectively. Finally, the antioxidant activities were: b-carotene, 65.50% and 47.75%; DPPH, 0.079 IC50 g/L and 0.0046 IC50 g/L; and ABTS, 13.72 IC50 g/L and 0.238 IC50 g/L, respectively. The results obtained in this study confirm that the ‘Medjool’ cultivar grown in Mexico has the same quality of nutrients and antioxidants as those grown in the other main date-producing countries.

【 授权许可】

CC BY