Abstract
Micromeria frivaldszkyana is an endemic species found only in Bulgaria. Its essential oil (EO) composition is unknown. This study assessed the EO yield and composition of M. frivaldszkyana as a function of the location and of drying prior to the EO extraction. M. frivaldszkyana was sampled from two natural habitats, Uzana and Shipka in the Balkan Mountains; the EO was extracted via hydrodistillation and analyzed on GC/MS. The plants from the two locations had distinct EO composition. The EO content (in dried material) was 0.18% (Uzana) and 0.26% (Shipka). Monoterpene ketones were the major group of the EO constituents. Also, hydrocarbons predominated in the EO from Shipka, and alcohols predominated in the EO from Uzana. The EO from Uzana had a greater concentration of menthone (56% vs. 17% from Shipka) and neomenthol (7.8% vs. 2.4%). Conversely, the EO from Shipka had greater concentrations of pulegone (50% vs. 20% from Uzana), limonene (10.1% vs. 2.6%), and germacrene D (3.4% vs. 1.1%). Drying prior to the EO extraction altered the concentration of some constituents. This is the first report of M. frivaldszkyana EO yield and composition. The EO showed some similarities with the chemical profile of other Micromeria species, but overall, it has an unique chemical profile and may have distinctive applications.
Highlights
Micromeria frivaldszkyana (Degen) Velen. is an endemic plant species found only in Bulgaria.The genus Micromeria Benth. belongs to the family Lamiaceae, subfamily Nepetoideae
Another study [10] reported the Essential Oil (EO) composition of M. cristata and M. juliana collected in Serbia and Montenegro
Drying of the plant material prior to EO extraction resulted in a significant shift in the chemical groups of the EO constituents; hydrocarbons and alcohols were greater in the EO from the dried material than in the EO from the fresh material (Table 1)
Summary
Micromeria frivaldszkyana (Degen) Velen. is an endemic plant species found only in Bulgaria.The genus Micromeria Benth. belongs to the family Lamiaceae, subfamily Nepetoideae. Is an endemic plant species found only in Bulgaria. Belongs to the family Lamiaceae, subfamily Nepetoideae. The number of species in the Micromeria genus varies in different taxonomic schemes [1]. According to Harley et al [2], the genus comprises about 70 species, but according to another taxonomic study [3], the genus. Micromeria includes 54 species, 32 subspecies, and 13 varieties. Plants of the genus are widely distributed from the Himalayan region to the Macaronesian Archipelago (Madeira, Cape Verde, and Canary Islands) and from the Mediterranean to South Africa and Madagascar [4].
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