Evaluation of phenolic content and antioxidant capacity in some medicinal herbs cultivated in Iran
2012
Derakhshani, Z., Urmia University, Urmia (Iran Islamic Republic). Faculty of Agriculture, Department of Horticulture | Hassani, A., Urmia University, Urmia (Iran Islamic Republic). Faculty of Agriculture, Department of Horticulture | Pirzad, A., Urmia University, Urmia (Iran Islamic Republic). Faculty of Agriculture, Department of Agronomy and Plant Breeding | Abdollahi, R., Urmia University, Urmia (Iran Islamic Republic). Faculty of Agriculture, Department of Horticulture | Dalkani, M., Urmia University, Urmia (Iran Islamic Republic). Faculty of Agriculture, Department of Horticulture
In this study the total phenolic content and antioxidant capacity of various medicinal plant species belonging to the Lamiaceae family cultivated in the climatic conditions of Iran were determined and compared. The phenolic content and antioxidant capacity of flowers and leaves of some Lamiaceae species were also compared with those of several non-Lamiaceae species. Total phenolic content and antioxidant capacity of the selected herbs ranged from 6.87 to 33.22 mg GAE/g fresh weight and 0.59 to 3.70 mmol Fe/100 g fresh weight, respectively. The highest phenolic content and antioxidant capacity was found in rosemary (Rosmarinus officinalis) and the lowest contents were found in flower-of-an-hour (Hibiscus trionum). Although antioxidant capacity and phenolic content in the selected Lamiaceae herbs varied, all of them had useful levels of phenolic compounds and demonstrated considerable antioxidant capacity. It seems that consumption of these herbs could be useful to decrease the damage caused by reactive oxygen species and reduce the risk of diseases. Furthermore, the results showed that flowers as well as leaves of the selected herbs could have a high phenolic content and antioxidant capacity. In this study, Lamiaceae herbs were also shown to have higher amounts of phenolic compounds and antioxidants compared with herbs belonging to other families.
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