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Abstract

Comparative Analysis of Nepeta Crispa Essential Oil Composition in Flowering and Vegetative Stages

Objective: Growth stage is one of important factors in component of essential oil, both from quantity and quality aspects. Nepeta crispa (Lamiaceae) with "Mofarrah" as local name is one of endemic plants with several traditional uses in Iran. It’s aerial parts are used to prepare infusions and beverages for use as sedative, relaxant, carminative, tonic for respiratory and nervous disorders. Evaluation of the essential oil pattern in two above mentioned growth stages was the aim of this study.
Methods:Aerial parts of plant in both stages of growth were dried, powdered and essential oils were isolated by Clevenger type apparatus. Obtained essential oils were injected to GC/MS.
Results: In vegetative stage 32 constituents were identified which the main components were: 1,8-cineol (43.8%), α-Terpineol(11.03%), 4aα,7α,7aα-Nepetalactone (10.36%), δ-Terpineol(4.95), α-Bisabolene (4.55), 4aα,7β,7aα-Nepetalactone (3.67) and 4-Terpineol (3.65) and in flowering stage, 31 compounds were identified while, 1,8-Cineole (44.25%), 4aα,7α,7aα-Nepetalactone (24.72%), α-Terpineol (6.3%), δ-Terpineol (2.99) had the major amounts.
Conclusion: these results present that the N. crispa essential oil in two growth stages were different both of content and presence of compounds.


Author(s): Parisa abdoli, Shirin moradkhani and Dara dastan

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