Chemical Composition of the Leaf and Flower Essential Oils of Tunisian Lavandula dentata L. (Lamiaceae) |
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| Authors: | Bechir Touati Hnia Chograni Imed Hassen Mohamed Boussaïd Lamjed Toumi Nadia Ben Brahim |
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| Affiliation: | 1. Laboratory of Botany and Ornamental Plants, National Institute of Agronomical Research of Tunisia, Street of Heddy Karry, 2049, Ariana, Tunisia;2. Laboratory of Genetic and Forester Plant, Forestry and Pastoral Institute of Tabarka, Tunisia;3. Laboratory of Plant Biotechnology, National Institute of Applied Science and Technology, Tunisia;4. Unit of Physicochemical Research Studies of Substances and Natural Mediums, National Institute of Research and Physicochemical Analysis, Tunisia |
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| Abstract: | Essential oils of Lavandula dentata, a Tunisian native plant, were isolated from leaves and flowers by hydrodistillation in a Clevenger‐type apparatus and characterized by GC‐FID and GC/MS analyses. The average essential oil yields, means of five replicates, were higher for the flowers (8.60 mg/g) than for the leaves (6.56 mg/g). A total of 72 compounds were identified, accounting for 98.1 and 97.7% of the total oil composition of the leaves and flowers, respectively. The main essential oil constituents were 1,8‐cineole, camphor, and L ‐fenchone, accounting for 33.54, 18.89, and 8.36% in the leaf oils and for 19.85, 23.33, and 7.13% in the flower oils, respectively. Besides this quantitative variation, the results also showed considerable qualitative variation between the essential oils of the two plant parts analyzed. These differences might be adaptative responses to ecological exigencies. |
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| Keywords: | Lavandula dentata Essential oils 1,8‐Cineole Camphor Principal components analysis (PCA) |
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