The Seasonal Variation of Polyphenolic Compounds and Antioxidant activity of Myrtus communis L. in Iran
Journal Title: International Journal of Farming and Allied Sciences - Year 2015, Vol 4, Issue 3
Abstract
The seasonal variation of the antioxidant activity (DPPH assays) and the phenolic compounds (HPLC assay) of Myrtus communis L. (Myrtaceae), grown in Iran, as affected by four seasonals, namely summer, autumn, winter and spring were investigated. Considerable amounts of inhibitory effects were observed which range from 449.71 mg l-1 in summer to 99.296 mg l-1 during spring, at the same stage in spring, the extracts showed the highest antioxidant capacity, as well as the highest phenolic content (21.04 mg gallic acid/g and 4.9604mg coumarin/g plant). In contrast, the highest accumulation of catechin and trans-ferulic acid were observed during the cooler months (winter). In other phenolic compounds, certain trends were not observed in plants in different seasons. In the warmer months (summer), the levels of phenolic compounds, and antioxidant were in most cases, lower than those in the samples harvested in the cooler months (winter). All extracts were extremely rich in phenolic compounds, and provided good antioxidant properties, but the phenol phase in which the leaves were collected affected the phenolic composition of the myrtle extracts and consequently their biological activity. The spring (March-June) extract, the richest in main phenolic compounds (gallic acid and coumarin) showed the best antioxidant properties. Thus collection of the plants during spring seems the best choice for further use in pharmaceutical and food industry.
Authors and Affiliations
Raheleh Mirzaee and Sharareh Najafian
Keywords
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