期刊
BIOCHEMICAL SYSTEMATICS AND ECOLOGY
卷 82, 期 -, 页码 35-43出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bse.2018.12.002
关键词
Essential oils; Geographical origin; Phenological stage; Salvia verbenaca; Chemical composition
资金
- Tunisian Ministry of Higher Education and Scientific Research
- European Social fund
The effect of the collection sites and phenophase on yield and chemical composition of Salvia verbenaca essential oils was evaluated. The essential oil constituents were assessed by gas chromatography (GC) and gas chromatography mass spectrometry (GC-MS). The highest essential oil yields were observed for samples of the higher semi-arid5 bioclimate and at the flowering period. Eighty-five volatile constituents were identified and their percentages varied significantly (p < 0.05) depending on the collection site and the phenological stage. According to the plants origin, essential oils were dominated by monoterpene hydrocarbons, oxygenated monoterpenes and sesquiterpene hydrocarbons. The monoterpene hydrocarbons (31.9%) predominate at the flowering stage whereas oxygenated sesquiterpenes (27.5%) at the early fruiting stage. The sesquiterpene hydrocarbons (28.2%) was the most represented chemical class at late fruiting. On the basis of GC-MS data, the major identified volatile constituents were viridiflorol (3.4-17.7%), alpha-pinene (0.7-15.9%), beta-caryophyllene (1.0-15.3%) and p-cymene (1.3-14.2%). S. verbenaca contains a diversity of bioactive constituents which shows large variations as affected by the collection sites and phenophase.
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