Comparative Study of the Fatty Acids and Tocopherol Profiles, Physical Properties, and Antioxidant Activities of Zizyphus lotus L. Seed Oils Based on the Geographical Origin

Autor: Moncef Chouaibi, Ahmed Snoussi, Hayet Ben Haj Koubaier, Nabiha Bouzouita
Rok vydání: 2021
Předmět:
Zdroj: Chemistry Africa. 5:69-78
ISSN: 2522-5766
2522-5758
DOI: 10.1007/s42250-021-00294-0
Popis: Zizyphus lotus L. seeds contain a high amount of lipids representing a rich source of health promoting components. However, the chemical composition is influenced by several factors for instance the geographic location of the plant. This study focused on the evaluation of the effect of the plant location on the fatty acids and tocopherols composition as well as the antioxidant activities of the cold-pressed oils extracted from Zizyphus lotus L. seeds. Physical properties of oil seeds were also investigated. The results revealed that the lipid fraction yield ranged from 20.13 to 24.57% (w/w) for samples harvested from Siliana and Sidi Bouzid, respectively. We identified ten fatty acids, among which oleic acid was the major component in all analysed samples, accounting for 60.45–70.36% of the total fatty acids, followed by linoleic acid (16.40–19.40%) and palmitic acid (5.02–12.60%). Besides, the total tocopherol amounts varied from 168.26 to 241.41 mg/100 g of oil, with β-tocopherol as the main component and compositional ratio differences between regions were noticed. Furthermore, remarkable values of DPPH and ABTS+ radical scavenging activities were obtained. A cluster analysis highlighted differences attributed to the origin of the sample, which could be considered as an efficient tool for cultivar authenticity purposes and valorization. The obtained results are of great economic interest and could increase the demand for Zizyphus lotus L. seed oil for potential applications in the food, cosmetic and medicinal industries.
Databáze: OpenAIRE
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