Chemical composition of essential oils of two species of the Lamiaceae family:Scutellaria volubilisandLepechinia paniculatafrom Loja, Ecuador

Abstract

Scutellaria volubilis and Lepechinia paniculata belong to the Lamiaceae family of species. They are used widely in traditional medicine in Ecuador. The physical properties and chemical composition of the essential oils from the aerial part of Scutellaria volubilis in its foliation -flowering stage and Lepechinia paniculata in its flowering phase have been studied after their hydrodistillation. The components of these essential oils were investigated by means of gas chromatography/mass spectrometry (GC/MS) and gas chromatography/flame ionization detection (GC/FID) techniques. Thirty-seven components were determined in the essential oil of S. volubilis. The principal constituents were found to be sesquiterpene hydrocarbons: germacrene D (20.4%), b-caryophyllene (17.5%), a-humulene (14.7%) and b-bisabolene (5.8%). Thirty-four components were identified in the essential oil of L. paniculata, the principal groups were sesquiterpene hydrocarbons such as aromadendrene (24.6%), viridiflorene (12.4%), b-selinene (7.4%) and valencene (6.7%). The monoterpene hydrocarbons were present in lower amounts as well as b-phellandrene (6.9%) and (7.7%). Oxygenated monoterpenes and sesquiterpenes contribute below 5% in both species. This is the first report on the chemical composition of this species.

Chemical Composition, Enantiomeric Analysis, AEDA Sensorial Evaluation and Antifungal Activity of the Essential Oil from the Ecuadorian Plant Lepechinia mutica Benth (Lamiaceae)

“…However, due to the heterogeneity of compounds identified in Lepechinia spp, it has not been possible to establish a typical metabolic pattern. The essential oils of seven different Ecuadorian plants of the family Lamiaceae have been studied so far, including two species belonging to the genus Lepechinia . In 2002, Malagón et al.…”

“…Some species are used for their antitumor and insulin-mimetic properties, to treat uterine infections and stomach pains. [1] Regarding the essential oil components, 15 species of the genus Lepechinia have been studied so far, including L. conferta, [1] L. floribunda, [2 -5] L. graveolens, [3] L. caulescens, [6] L. paniculata, [7] L. betonicifolia, [8] L. meyeni, [3] [9] L. salviaefolia, [10] L. bullata, [11] L. calycina, [12] L. schiedeana, [13 -15] L. urbanii, [16] L. chamaedryoides, [17] L. radula. [18] In Table 1, we have reported the major compounds from some Lepechinia species.…”

“…The essential oils of seven different Ecuadorian plants of the family Lamiaceae have been studied so far, including two species belonging to the genus Lepechinia. [7] [19] In 2002, Malag on et al identified 54 compounds in the essential oil from L. mutica, collected at 'Cerro el Villonaco' (Loja, Ecuador), on the basis of their retention indices, referred to a series of homologous fatty acid methyl esters, [19] and the comparison of the mass spectra with an early collection of reference spectral data. [20] The gas chromatography-olfactometry (GC-O) technique couples traditional gas chromatographic analysis with sensory detection.…”

“…Thus GC-O may be considered a biological detection method for the Table 1. Major components in the essential oils of genus Lepechinia Major compound L. conferta [1] L. floribunda [2 -5] L. graveolens [3] L. caulescens [6] L. paniculata [7] L. betonicifolia [8] L. meyeni [3 -9] L. salviaefolia [10] L. bullata [11] L. calycina [12] L. schiedeana [13 -15] L. urbanii [16] L. chamaedryoides [17] L. radula [18] (À)-Palustrol characterization of the odor of compounds separated and quantified by GC chromatography. [21] Indeed, the correlation of the eluted peaks with specific odors affords to establish accurate retention indices or retention times for the odor active components, while peak areas in the GC-FID chromatogram are indicative of the relative abundance of the components.…”

Effect of Forest Biomass Pretreatment on Essential Oil Yield and Properties

“…EOs' relative density was determined by a liquid volume pycnometer (25 mL) according to the French standard NF ISO 279: 1999 (T75-111) [34] and calculated according to Equation 2:…”