Journal
SOUTH AFRICAN JOURNAL OF BOTANY
Volume 146, Issue -, Pages 71-76Publisher
ELSEVIER
DOI: 10.1016/j.sajb.2021.10.003
Keywords
Quercus ilex seeds; Quercus coccifera seeds; Nutrient composition; Sterols; Starch acorn functional properties
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This study determined the chemical compositions of Quercus Ilex and Quercus coccifera, finding that they are rich in fat, protein, dietary fiber, and ash, with essential amino acids, minerals, and phenolic compounds, demonstrating their potential as food resources.
The crude fat (7.2%, 5.6%), crude protein (3.71%, 2.9%), dietary fiber (2.6%, 2.7%) and total ash (2.19%, 2.47%) contents were determined for Quercus Ilex (Q.I) and Quercus coccifera (Q.C), respectively. The main fatty acids in acorn oils of quercus were oleic (54.77%, 49.88%), linoleic (23.04%, 28.25%), and palmitic acid (18.23%, 17.57%) in Q.I and Q.C species, respectively. The sterol composition for acorn oil Q.C was determined for the first time in this work. The contents of essential amino acids, in acorns of Q.I and Q.C were determined and some of them were within the FAO reference values. Acorn seeds were also a good source of K, P, Ca and Mg. The ethanolic extracts of acorns Q.I and Q.C were rich in phenolic compounds. The starch extracted from the seeds of acorns had a ratio between the contents of amylose and amylopectin 31/69, 36/64 for Q.I and Q.C, respectively. The current results show the potential of these two studied species of acorn and their uses as food resources. (c) 2021 SAAB. Published by Elsevier B.V. All rights reserved.
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