Phytochemistry (extraction, identification and measurement of active components)
S.M.R. Habibian; P. Sorbi Akbari; V. Rowshan
Abstract
Teucrium polium L. belongs to the fam. Lamiaceae and grows mostly in the barren, rocky, and sandy areas of various parts of Europe, the Mediterranean, North Africa, and southwest Asia including Iran. It has various therapeutic properties such as analgesic, antipyretic, antioxidant, and antihypertensive. ...
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Teucrium polium L. belongs to the fam. Lamiaceae and grows mostly in the barren, rocky, and sandy areas of various parts of Europe, the Mediterranean, North Africa, and southwest Asia including Iran. It has various therapeutic properties such as analgesic, antipyretic, antioxidant, and antihypertensive. These healing properties are due to the presence of various chemical compounds in the essential oil. Plant harvest at the different phenological stages has a great impact on the amount of essential oil compounds of this species. This study was conducted to evaluate the quantitative and qualitative changes of T. polium essential oil (EO) during the growing season in Cheshmeh-e-Anjir rangelands of Fars province and at three phenological stages (vegetative peak, beginning of flowering, and flowering peak) in a completely randomized block design in 2017. The EOs were analyzed by GC and GC/MS. The results of this study showed that the main EO constituents were caryophyllene oxide (12.1%), α-pinene (11.8%), germacrene D (9.1%), myrcene (8.5%), limonene (7.2%), β-pinene (6.7%), bicyclogermacrene (6.6%), E-caryophyllene (4.6%), and α-bisabolol oxide B (3.4%) at the vegetative peak stage with the EO percentage of 0.9%, germacrene A (26.6%), bicyclogermacrene (18.3%), (E)-β-ocimene (8.9%), myrcene (7.8%), spathulenol (6.0%), limonene (5.3%), α-pinene (3.6%), and β-pinene (2.6%) at the begining of flowering with the EO percentage of 0.3%, and α-pinene (25.8%), myrcene (12.5%), germacrene D (11.8%), β-pinene (11.7%), limonene (8.5%), spathulenol (4.6%), and bicyclogermacrene (7.2%) at the flowering peak with the EO percentage of 0.2%.
Y. Imani
Abstract
In order to investigate the quantitative changes of essential oil during growth period (vegetative, flowering, after flowering) in Melissa officinalis, samples were collected from Arasbaran and Malekan for two years (2001 and 2002). All samples were dried in laboratory condition and then essential oils ...
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In order to investigate the quantitative changes of essential oil during growth period (vegetative, flowering, after flowering) in Melissa officinalis, samples were collected from Arasbaran and Malekan for two years (2001 and 2002). All samples were dried in laboratory condition and then essential oils were extracted by steam distillation method. The oils were dried over anhydrous sodium sulfate and weighted. Combined analysis of data was done with C.R.D design in 3 replications. Combined analysis of data for Melissa officinalis indicated that effects of year, location and phenology phases weren’t significantly different, but the interaction of (year × location) and (location × year × phenology phases) were significantly different at 1% probability level. Means were grouped using L.S.D (5%). Based on the results of this study, essential oil yield in Malekan was higher at first year at flowering stage (0.197%). Mean of interaction (year × location) showed that oil yield of Melissa officinalis in Malekan at first and second year were respectively (0.108 and 0.080%), and in Arasbaran were (0.035 and 0.018%). The results of the two years showed that the average oil content at first year was more than that at second year.
