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Alireza Sardashti, Alireza Sardashti,
Volume 3, Issue 1 (6-2021)
Abstract

Perovskia.atriplicifolia.Benth is an extensive ethno medical tradition, the photochemistry of this plant has been the topic of several studies. The purpose of this research is investigating the variation in the essential oil composition of Perovskia. atriplicifolia plant at the different growth stages from Taftan mountain .The leaves of P. atriplicifolia were harvested before flowering, flowering, and after flowering stages.The essential oils were extracted by hydro distillation method which were analyzed by the GC & GC-MS techniques. Oil yields (w/w%) related at three stages of plant growth were in the order of: before flowering (1.28), flowering (1.15),  and after flowering (1.03). In total 52, 62, and 43 components were identified using Kovats indices and quantified in the oils of the before flowering, flowering and after flowering stages representing 92.0 %, 86.31%, and66.46 %   respectively. The higher percent of which: geranyl acetate, 1,8-cineole, δ-3-carene ,trans-caryophyllene, bornyl acetate ,camphene,valeranone,α-pinene,were the main compounds in all oil samples.Total terpenoids were the main group of compounds in the before flowering (91.58 %), flowering (84.03 %) and after flowering stages (65.72 %) respectively. The before flowering stage essential oil is of the best quality.
 
Alireza Sardashti,
Volume 3, Issue 2 (12-2021)
Abstract

Varthemia persica Dc. (Compositae) is an aromatic plant which is used as an anti-spasmodic and anti-emetic for some kidney conditions. In the present study, the chemical composition of the leaf and stem oils of the plant are collected from South Khorasan province (Iran). The essential oils were obtained by hydro distillation method and were analyzed using the GC and GC-MS techniques. The efficiency of extracting (w/w%) are 0.93 and 0.37 on a dry weight basis for the leaf and stem oils respectively. In the leaf oil, fourty-two compounds were identified  accounting to 84.63 % of the total oil. The major compounds were, naphtha[2,3-b] oxirene, dehydrate-(22.90%), cysteinyl-acetate (21.36%), isolongifolene,7,8-dehydro-8a-hydroxy (8.73%), and unknown constituents (0.84%). The main components among the thirty constituents characterized in the stem oil representing 45.41% of the total components detected, naphtha[2,3-b] oxirene, decahydrate (10.12%), isolongifolene,7,8-dehydro-8a- hydroxy (9.66%), and bicycle [3.1.1] hept-2-en-4-ol,2,6,6-trimethyl-acetate (8.15%). It seems that the leaf oil is a sesquiterpene-rich essential oil (43.26%). In leaf essential oil, the percentage of oxygenated terpenoids is 68.20 % which is an indicative of the antibacterial properties. Compared to stem oil sample, the leaf sample’s essential oil is of the best quality.
 


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