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Characteristic Profiles of an Original Drink Sap from Male and Female Deglet Nour Palm (Phoenix dactylifera L.) during Collection Period


Affiliations
1 Ecole Nationale d'Ingenieurs de Sfax, Universite de Sfax, Laboratoire Analyse, Valorisation et Securite des Aliments, route de Soukra, 3038 Sfax, Tunisia
2 Gembloux Agro Bio-Tech, Universite de Liege, Unite de Technologie des Industries Agro-Alimentaires, Passage des Deportes 2, 5030 Gembloux, Belgium
 

This work aimed to evaluate the nutritional quality of a typical natural drink from male and female Deglet Nour (DN) date palm (Phoenix dactylifera L.) during the collection period. Dry matter, protein, amino acids, and sugar profiles were determined using AFNOR norm, Kjeldahl method, HPLC, and HPAEC-PAD, respectively. The male sap dry matter content was higher than that of the female. It decreased significantly through the tapping period. During the harvest, the male sap protein content decreased but increased significantly in the female sap. Finally, sugar fraction, for both male and female DN sap, was dominated by sucrose, glucose, fructose, and a small amount ofmyo-inositol. During the collection time, sugar content is affected by the sex especially for myo-inositol content that increased significantly in the female date sap, unlike that of the male one.This may be related to the fact that the male palm is more resistant to physiological stress, inducing myo-inositol formation during tapping.
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  • Characteristic Profiles of an Original Drink Sap from Male and Female Deglet Nour Palm (Phoenix dactylifera L.) during Collection Period

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Authors

Ines Makhlouf-Gafsi
Ecole Nationale d'Ingenieurs de Sfax, Universite de Sfax, Laboratoire Analyse, Valorisation et Securite des Aliments, route de Soukra, 3038 Sfax, Tunisia
Abir Mokni-Ghribi
Ecole Nationale d'Ingenieurs de Sfax, Universite de Sfax, Laboratoire Analyse, Valorisation et Securite des Aliments, route de Soukra, 3038 Sfax, Tunisia
Hamadi Attia
Ecole Nationale d'Ingenieurs de Sfax, Universite de Sfax, Laboratoire Analyse, Valorisation et Securite des Aliments, route de Soukra, 3038 Sfax, Tunisia
Christophe Blecker
Gembloux Agro Bio-Tech, Universite de Liege, Unite de Technologie des Industries Agro-Alimentaires, Passage des Deportes 2, 5030 Gembloux, Belgium
Souhail Besbes
Ecole Nationale d'Ingenieurs de Sfax, Universite de Sfax, Laboratoire Analyse, Valorisation et Securite des Aliments, route de Soukra, 3038 Sfax, Tunisia

Abstract


This work aimed to evaluate the nutritional quality of a typical natural drink from male and female Deglet Nour (DN) date palm (Phoenix dactylifera L.) during the collection period. Dry matter, protein, amino acids, and sugar profiles were determined using AFNOR norm, Kjeldahl method, HPLC, and HPAEC-PAD, respectively. The male sap dry matter content was higher than that of the female. It decreased significantly through the tapping period. During the harvest, the male sap protein content decreased but increased significantly in the female sap. Finally, sugar fraction, for both male and female DN sap, was dominated by sucrose, glucose, fructose, and a small amount ofmyo-inositol. During the collection time, sugar content is affected by the sex especially for myo-inositol content that increased significantly in the female date sap, unlike that of the male one.This may be related to the fact that the male palm is more resistant to physiological stress, inducing myo-inositol formation during tapping.