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Research article - Peer-reviewed, 2020

Dietary fiber components, microstructure, and texture of date fruits (Phoenix dactylifera, L.)

Kamal-Eldin, Afaf; Navomy, George; Sobti, Bhawna; AlRashidi, Nouf; Ghnimi, Sami; Ali, Abdul Aziz; Andersson, Annica; Andersson, Roger; Antony, Asha; Hamed, Fathalla


Date fruits vary widely in the hardness of their edible parts and they are classifed accordingly into soft, semi-dry, and dry varieties. Fruit texture, a signifcant parameter in determining consumer acceptance, is related to the tissue structure and chemical composition of the fruit, mainly the ratio of sucrose to reducing sugars. This study aimed to understand the relationship between the chemical composition, microstructure, and texture profle of 10 major Emirati date fruits. The soluble sugars, glucose and fructose, represent ca 80 g/100 g of the fruits on the basis of dry weight (DW) while the dietary fber contents varied 5.2–7.4 g/100 dg D.W. with lignin being the main determinant of the variability. The textures of the samples were studied using instrumental texture profle analysis. While no correlation was found between the soluble sugar and texture parameters in this study, the diferent fber constituents correlated variably with the diferent parameters of date fruit texture. Lignin, arabinoxylan, galactomannan, and pectin were found to correlate signifcantly with fruit hardness and the related parameters, gumminess and chewiness. Both lignin and arabinoxylan correlated with resilience, and arabinoxylan exhibited a strong correlation with cohesiveness.

Published in

Scientific Reports
2020, volume: 10, number: 1, article number: 21767

Authors' information

Kamal-Eldin, Afaf
United Arab Emirates University
Navomy, George
United Arab Emirates University
Sobti, Bhawna
United Arab Emirates University
AlRashidi, Nouf
United Arab Emirates University
Ghnimi, Sami
University of Lyon
Ali, Abdul Aziz
Linnaeus University
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Antony, Asha
United Arab Emirates University
Hamed, Fathalla
United Arab Emirates University

UKÄ Subject classification

Food Science

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