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J Food Biochem. 2019 Aug;43(8):e12935. doi: 10.1111/jfbc.12935. Epub 2019 May 31.

Chemical composition and antioxidant potential of essential oil and methanol extract from Tunisian and French fennel (Foeniculum vulgare Mill.) seeds.

Author information

1
Higher Agronomic Institute of Chott Mariem, Sousse University, Chott Mariem, Tunisia.
2
National Agronomic Institute of Tunisia, Tunis, Tunisia.
3
Laboratory of Medicinal and Aromatic Plants, Center of Biotechnology of Borj-Cedria, Hammam-Lif, Tunisia.
4
Institut des Régions Arides de Médenine, Université de Gabes, Gabes, Tunisia.

Abstract

This study was designed to examine the effect of provenance on the phytochemical and antioxidant properties of essential oil and methanolic extract from Tunisian and French fennel seeds (FFS). Analysis of the essential oil showed that although the same main compounds were found in Tunisian and FFS cultivars, some differences were present in their proportions allowing to classify them in two chemotypes. The first class was composed by trans-anethole (63.41%-78.26%) for Tunisian cultivars and the second one by estragole (44.72%-88.92%) for French cultivars. The phenolic composition of all fennel seed extracts was characterized by its richness in quinic acid, 4-O-caffeoylquinic acid, p-coumaric acid, and 4-O-caffeoylquinic acid. All fennel seed extracts showed a better antioxidant potential than their essential oils depending on the origin. Principal component analysis showed a dispersion of the cultivars on three groups depending on the chemotype diversity. PRACTICAL APPLICATIONS: Recently, much attention has been focused on fennel due to the nutritional and health-protective value of their seeds. Several studies have highlighted the importance of fennel seed extracts and essential oils as key ingredients rich in bioactive compounds serving in formulation of new functional food products. This investigation designed to examine the effect of provenance on phytochemical and antioxidant potentials of Tunisian and French fennel seed extracts and essential oils.

KEYWORDS:

Foeniculum vulgare Mill.; antioxidant activity; essential oil; geographic origin; methanol extract; phenolic compounds

PMID:
31368565
DOI:
10.1111/jfbc.12935

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