Zahra Reaisi; Mehrab Yadegari; Hamze Ali Shirmardia
Abstract
This study aimed to evaluate effects of elevation and phenological stage on essential oil components of Teucrium polium L. and Teucrium orientale L. belonging to the Lamiaceae family. The aerial parts of the grown plants in two ranges of elevation including 2000-2500 and 2500-3000 m above sea level were ...
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This study aimed to evaluate effects of elevation and phenological stage on essential oil components of Teucrium polium L. and Teucrium orientale L. belonging to the Lamiaceae family. The aerial parts of the grown plants in two ranges of elevation including 2000-2500 and 2500-3000 m above sea level were harvested at three time-points, including end of vegetative, flowering, and seed filling stages. The main components in the T. polium oil were α-pinene (40.52 to 54.05%), β-pinene (17.36 to 23.3%), and limonene (10.10 to 15.19%) and the major constituents in the essential oil of T. orientale were α-pinene (0.00 to 25.10%), and β-caryophyllene (18.18 to 56.01%). Analysis of results confirmed the significant effects of phenological stage and elevation on the percentages of essential oil components. High elevation above sea level caused increase in aromatic compounds such as α-pinene and limonene from monoterpene hydrocarbons but decrease in sesquiterpene compounds such as β-caryophyllene contents. There was significant correlation between essential oil constituents under different elevations and phenological stages. In addition, harvesting time at different phenological stages affected the chemical compositions in the essential oils, in a way that the highest concentrations of α-pinene and β-pinene as volatile components (monoterpene hydrocarbons) and β-caryophyllene (sesquiterpene hydrocarbons) as important constitutes in pharmaceutical industry were obtained from flowering stage.
Mohammad Moghaddam; Seyed Naser Khaleghi Miran; Leila Mehdizadeh
Abstract
Fumaria vaillantii (Fumariaceae) is an annual plant which is growing in a wide diversity area of Iran which has been used traditionally in the folk medicine. Antioxidants have great importance to reduce oxidative stress and prevention of damage to biological molecules. The present study was designed ...
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Fumaria vaillantii (Fumariaceae) is an annual plant which is growing in a wide diversity area of Iran which has been used traditionally in the folk medicine. Antioxidants have great importance to reduce oxidative stress and prevention of damage to biological molecules. The present study was designed to investigate the antioxidant activity of ethanolic extract from aerial parts of Fumaria vaillantii L. by using three different methods including 2, 2-diphenyl-1-picrylhydrazyl (DPPH), Ferric reducing antioxidant power (FRAP) and Phosphomolybdenum complex at three different growth stages. In addition, total phenolic contents of the extracts were determined using Folin-Ciocalteu method. According to the obtained results, the total phenol contents of aerial parts harvested at vegetative, budding and flowering stages were 68.38, 71.11 and 56.42 mg GAE/g extract, respectively. Antioxidant activities of the extracts were decreased from vegetative to flowering stages in DPPH and FRAP methods. In conclusion, ethanolic extract from vegetative stage of Iranian F. vaillantii can be considered as a potential source of natural antioxidants for food and pharmaceutical industries.
