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The antioxidant activity of wild rose fruit
The vegetal products used in the pharmaceutical and food area from the wild rose (Rosa canina, L. Rosaceae) are the fruits and the seeds, Cynosbati fructus and Cynosbati semen. The fruits contain vitamins (C, B, PP, K), carotenoids, pectins, tannins, carbohydrates, while the seeds contain fats, oil and vitamin F [1,2]. The present study aims to analyze two types of 6% extractive solutions (hydroalchoolic maceration and hydro – infusion) of dried and 6 months – frozen wild rose fruits, by determining the content of: vitamin C (titrimetric analysis), total polyphenols (Folin Ciocâlteu method), total carotenoids (spectrophotometrically) as well as by establishing the antioxidant activity (DPPH method and ORAC method) [3,4]. The vegetal products were harvested in October 2009 from the hills in the Danube river area, Moldova Noua, Romania. Dried wild rose fruits showed the highest concentration of vitamin C (154.20mg/100g). The content of total polyphenols was similar for both dried and frozen samples. The antioxidant activity of the extractive solutions was not significantly influenced by the type of extraction or extractive solvent, but higher values were obtained in the case of frozen wild rose fruits (71,27 Eq Trolox/1ml comparing to the extractive solutions of dry fruits 41,03 Eq Trolox/1ml by ORAC method).
Acknowledgements: Bilateral Project No. 198/2009
References: 1. Molay, K.R. et al. (2010) Int. J. Food Sc. Nutr. 61:109–124.
2. Kilicgun, H. et al.(2009) Pharmacogn. Res. 6:417–420.
3. Peev, C. (2007) Mugurii foliari, materii prime in gemoterapie. Mirton. Timisoara. 26–35.
4. Szajdek, A. et al. (2008) Plant Foods Human Nutr. 63:147–156.