Search results for "ESSENTIAL OIL"
showing 10 items of 443 documents
Diterpenoids in the essential oils from the genus Stachys
2009
The occurrence of diterpenoids in the essential oils of the species of the genus Stachys (Lamiaceae, Labiatae) is reviewed.
The chemical composition of the aerial parts essential oil of Acinos alpinus subsp. nebrodensis (Lamiaceae) growing in Sicily (Italy)
2021
Acinos is a small genus of economically important plants belonging to Lamiaceae family whose botanical collocation is quite problematic due to the disagreement among the botanists and the presence in literature of several names and synonyms from different sources. In the present study the chemical composition of the essential oil from aerial parts of Acinos alpinus subsp. nebrodensis (Strobl) Brullo & Brullo collected in Central Sicily was analyzed by GC-MS. The result showed the presence of large quantity of sesquiterpene hydrocarbons with germacrene D (37.9%) as the most abundant component followed by (E)-β-caryophyllene (5.1%). Among the oxygenated monoterpenes thymol (8.3%) was the …
Comparative GC-MS Analysis of Bay Leaf (Laurus nobilisL.) Essential Oils in Commercial Samples
2015
Chemical composition of Laurus nobilis essential oils traded as spice and medicinal items was analyzed by gas chromatography-mass spectrometry. Sixty-four compounds accounting between 91–99% of the total oil was identified. Qualitative and quantitative differences were found among essential oils obtained from bay leaves used both for cooking and medicinal purposes. The oxygenated compounds were the principal fraction in all analyzed oils and consisted in oxygenated monoterpenes (73.13%), in medicinal essential oil and oxygenated monoterpenes (37.60 and 29.82%), oxygenated sesquiterpenes (15.98 and 22.99%), and phenylpropanoids (24.78 and 26.33%), respectively, in commercial food items. A hi…
Lavandula × intermedia—A Bastard Lavender or a Plant of Many Values? Part I. Biology and Chemical Composition of Lavandin
2023
This review article is the first in a series that provides an overview of the biology, chemistry, biological effects, and applications of Lavandula × intermedia (lavandin, LI). Despite its prevalence in cultivation and on the essential oil market, lavandin has received limited attention from the scientific community. Remarkably more attention is paid to Lavandula angustifolia (LA), which is commonly regarded as the superior lavender and has been extensively researched. Our goal is to provide a comprehensive review of LI, as none currently exists, and assess whether its inferior status is merited. In the first part, we outline the biological and chemical characteristics of the plant and comp…
Lavandula x intermedia—A Bastard Lavender or a Plant of Many Values? Part II. Biological Activities and Applications of Lavandin
2023
This review article is the second in a series aimed at providing an in-depth overview of Lavandula x intermedia (lavandin). In part I, the biology and chemistry of lavandin were addressed. In part II, the focus is on the functional properties of lavandin and its applications in industry and daily life. While reviewing the biological properties, only original research articles employing lavandin were considered. Lavandin essential oil has been found to have antioxidant and biocidal activity (antimicrobial, nematicidal, antiprotozoal, insecticidal, and allelopathic), as well as other potential therapeutic effects such as anxiolytic, neuroprotective, improving sleep quality, antithrombotic, an…
Comparative Evaluation of the Essential Oil of the New Ukrainian Lavandula angustifolia and Lavandula x intermedia Cultivars Grown on the Same Plots
2022
New cultivars of lavender adapted to arid steppe conditions were developed by the Institute of Rice of Ukrainian National Academy of Agrarian Sciences (NAAS). This work is a part of the characterization process of the new cultivars. The chemical composition of the essential oil of the seven new Lavandula angustifolia and eight new Lavandula x intermedia cultivars was investigated and compared. In total, 71 different compounds were identified. Linalool and linalool acetate were the main components in both species in ranges of 26.14–57.07% and 9.08–24.45%, respectively. They were followed by terpinen-4-ol (2.16–22.44%), lavandulyl acetate (2.12–10.23%), and lavandulol (1.30–3.14) in the case …
Enhanced levels of S-linalool by metabolic engineering of the terpenoid pathway in spike lavender leaves
2013
Transgenic Lavandula latifolia plants overexpressing the linalool synthase (LIS) gene from Clarkia breweri, encoding the LIS enzyme that catalyzes the synthesis of linalool were generated. Most of these plants increased significantly their linalool content as compared to controls, especially in the youngest leaves, where a linalool increase up to a 1000% was observed. The phenotype of increased linalool content observed in young leaves was maintained in those T1 progenies that inherit the LIS transgene, although this phenotype was less evident in the flower essential oil. Cross-pollination of transgenic spike lavender plants allowed the generation of double transgenic plants containing the …
Chemical Composition of Two Different Lavender Essential Oils and Their Effect on Facial Skin Microbiota
2019
Lavender oil is one of the most valuable aromatherapy oils, its anti-bacterial and anti-fungal activities can be explained by main components such as linalool, linalyl acetate, lavandulol, geraniol, or eucalyptol. The aim of the study was to assess the anti-microbial effects of two different lavender oils on a mixed microbiota from facial skin. The commercial lavender oil and essential lavender oil from the Crimean Peninsula, whose chemical composition and activity are yet to be published, were used. Both oils were analysed by gas chromatography coupled to mass spectrometry. The composition and properties of studied oils were significantly different. The commercial ETJA lavender oil contain…
Composition and variability of the essential oil of the flowers of Lavandula stoechas from various geographical sources
2015
Samples of flowers of wild Lavandula stoechas L. spp. stoechas populations were collected in three areas of Sicily (Italy) and were characterized in agronomic and chemical terms. Essential oil (EO) was extracted by hydrodistillation and analyzed by GC-FID and GC-MS. GC-FID and GC-MS analyses permitted identification of 89 compounds from the EO. The samples were separated into 3 groups using PCA (Principal Component Analysis) statistical method, with reference to the chemical composition of the EO. All three Sicilian populations of lavender were identified as the fenchone chemotype with percentage content ranged between 52.8–71.1%. The population of Partinico showed the highest dry weight o…
Expression of spearmint limonene synthase in transgenic spike lavender results in an altered monoterpene composition in developing leaves.
2008
We generated transgenic spike lavender (Lavandula latifolia) plants constitutively expressing the limonene synthase (LS) gene from spearmint (Mentha spicata), encoding the LS enzyme that catalyzes the synthesis of limonene from geranyl diphosphate. Overexpression of the LS transgene did not consistently affect monoterpene profile in pooled leaves or flowers from transgenic T(0) plants. Analyses from cohorts of leaves sampled at different developmental stages showed that essential oil accumulation in transgenic and control plants was higher in developing than in mature leaves. Furthermore, developing leaves of transgenic plants contained increased limonene contents (more than 450% increase c…