Variation of chemical composition and antioxidant activity of essential oils of Mentha x rotundifolia (L.) Huds. (Lamiaceae) collected from different bioclimatic areas of Tunisia |
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| Affiliation: | 1. Department of Plant Biology, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran;2. Department of Genetics, Faculty of Biological Sciences, Tarbiat Modares University Tehran, Iran;3. Department of Plant Biology, School of Biology and Center of Excellence in Phylogeny of living Organisms, College of Science, University of Tehran, Tehran, Iran;1. School of Pharmaceutical Science and Technology, Health Sciences Platform, Tianjin University, Tianjin, 300072, China;2. National Herbarium of Georgia, Ilia State University, Tbilisi, Georgia;3. Institute of Botany, Armenian National Academy of Sciences, Yerevan, Armenia;4. New York Botanical Garden, Bronx, NY, USA;1. Laboratoire de Biotechnologie, Protection et Valorisation des Ressources Végétales, Faculté des Sciences, Semlalia, (URAC 35) Université Cadi Ayyad, Marrakech, Morocco;2. Southern Cross Plant Science, Southern Cross University, Lismore 2480, NSW, Australia;3. Integria Healthcare, Gallans Rd, Ballina 2478, NSW, Australia;4. Division of Research, Southern Cross University, Lismore 2480, NSW, Australia;1. Laboratory of Chemical Reaction, Department of Process Engineering, College of Mechanical Engineering and Process Engineering, USTHB, PB 32 El Alia, 16075, Bab Ezzouar, Algiers, Algeria;2. Laboratory of Bacteriology and Veterinary Serology, Institute Pasteur, 34 Street Ahmed Cherifi KOUBA 16015 Algiers, Algeria |
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| Abstract: | The variation of the essential oils composition of 10 Tunisian Mentha x rotundifolia (L.) Huds. Populations and their antioxidant activity were assessed. Essential oils showed high percentages of oxygenated monoterpenes and sesquiterpene hydrocarbons. Rotundifolone, p-menthane-1,2,3-triol, β-caryophyllene and germacrene D were identified as main compounds at the species level. A variation in the essential oil composition was observed according to the populations and ecological factors. The populations 7, 8, 9 and 10 from the upper semi-arid bioclimatic zone and situated at high altitudes, exhibited the highest amount of rotundifolone. The populations 1, 2, 3, 4 and 5 from the lower humid showed a rotundifolone/β-caryophyllene/germacrene D chemotype. The population 6, situated at the lowest altitude, was characterized by the highest amount of p-menthane-1,2,3-triol. The level of antioxidant activity of the populations was linked to their chemical composition difference. The highest scavenging activity and the best ability to reduce ferric ions were recorded for the population 10. The most important capacity to inhibit β-carotene bleaching was revealed for the population 8. For all populations, the antioxidant activities were substantial but lower than antioxidant standards used (Trolox and BHT).The populations (7, 8, 9 and 10) from the upper semi-arid showed the best yields of essential oils and the highest contents of rotundifolone. Chemotypes within these populations could be selected for improvement programs. |
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| Keywords: | Natural population's essential oils Antioxidant activity Ecological factors |
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