Characterization and potential bioactivity of polyphenols of Rosa rugosa

Abstract

Rosa rugosa is widely cultivated in China, and the blossom of R. rugosa is used to extract rose essential oil or directly make into various foods, such as mei gui hua cake, mei gui hua sauce. Rose dregs are mostly used as fertilizer after extracting essential oil and the polar part has not been fully utilized. There is still much to be done in the products and deep processing of rose. In this study the content of total flavonol glycosides, the extractable polyphenols, the non-extractable polyphenols, the total phenolic and the total anthocyanins in R. rugosa from five major production areas in China was analyzed; the biological activities of the total extract, the polyphenols fraction, the flavonol glycosides fraction and the isolated compounds of R. rugosa were evaluated, including antioxidant, anti-ultraviolet, inhibitory activities of α-glucosidase, lipase, alveolar epithelial cell senescence and tyrosinase, together with regulating activities on intestinal flora. The components content of R. rugosa in different producing areas was significantly different. The total flavonol glycosides in Yunnan, the extractable polyphenols and the total phenolics in Shandong, the non-extractable polyphenols in Xinjiang, the total anthocyanins in Gansu was the higher than other areas. The polyphenols fraction showed antioxidant and anti-ultraviolet properties, inhibition of alveolar epithelial cell senescence, lipase and tyrosinase activities, and regulation of intestinal flora. The flavonol glycosides fraction showed α-glucosidase inhibitory activity. The results showed the polyphenols fraction and the flavonol glycosides fraction of R. rugosa could be used as skin care products and healthy food ingredient.