Essential oil composition and variability of Hypericum perforatum L. growing in Lithuania |
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| Institution: | 1. Department of Chemistry, Faculty of Science, Yarmouk University, Irbid, Jordan;2. Department of Basic Medical Sciences, King Saud Bin Abdulaziz University for Health Sciences, and King Abdullah International Medical Research Center (KAIMRC), Riyadh, Saudi Arabia;3. Department of Applied Sciences, Faculty of Engineering Technology, Al-Balqa Applied University, Marka, Jordan;4. Department of Biological Sciences, Faculty of Science, Yarmouk University, Irbid, Jordan;5. Department of Chemistry, Faculty of Science, The University of Jordan, Amman, Jordan;6. Department of Pharmaceutical Sciences, Faculty of Pharmacy, The University of Jordan, Amman, Jordan;1. Research Cluster Biodiversity and Medicines/Research Group Pharmacognosy and Phytotherapy, UCL School of Pharmacy, University of London, WC1N 1AX, UK;2. Division of Herbal and East Asian Medicine, Department of Life Sciences, University of Westminster, London W1W 6UW, UK;3. CAMAG, Sonnenmattstrasse 11, 4132 Muttenz, Switzerland |
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| Abstract: | The composition of essential oils obtained from flowers and leaves in 11 accessions of Hypericum perforatum L. was analysed by GC and GC–MS. All the analysed oils were dominated by their oxygenated sesquiterpene fraction. Differences were attributed to the main components: caryophyllene oxide, spathulenol and viridiflorol. There were only a few monoterpenes in essential oil of all accessions. The data indicated some differences in sesquiterpene and aliphatic hydrocarbons, as well as in oxygenated aliphatics biosynthesis in flowers and leaves. The concentrations of β-caryophyllene and caryophyllene oxide in essential oils from leaves were higher than those from flowers, whereas dodecanol, spathulenol, viridiflorol, carotol and tetradecanol were present in higher quantities in flowers. Cluster analysis of all identified components grouped oils from flowers and from leaves into three clusters that corresponded with their major components: caryophyllene oxide, tetradecanal, tetradecanol and manool. Chemical variability of the analysed accessions seems likely to result from the genetic variability, since the influence of different environmental factors has been eliminated. |
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