牡丹花黄酮的抗氧化活性研究

摘要

牡丹是中国特有的木本名贵花卉，素有“花中之王”的美称。黄酮类化合物广泛存在自然界各类植物中，多以苷类形式存在。本实验分别从DPPH·清除能力、·OH清除能力和还原力等三个方面，研究了牡丹花黄酮的抗氧化活性，结果表明：牡丹花黄酮能够清除DPPH·自由基和·OH自由基，同时也具有一定的还原力，牡丹花黄酮对DPPH·和·OH的半清除浓度（IC50）分别为259.29滋g/mL和1573.53滋g/mL，每克牡丹花黄酮的还原力相当于213.07mg抗坏血酸和993.67mg芦丁的还原力。%The peony is China's characteristic of woody rare flowers. Flavonoids widely exist in many kinds of plants, and in the form of glycosides. The antioxidant activity of flavonoids of peony were studied from 3 aspects of DPPH· scavenging activity, ·OH scavenging activity and reducing power in this experiment. The results showed that flavonoids of peony have reducing power and scavenging activity of ·OH and DPPH·. The IC50 of scavenging activity of DPPH·and ·OH were 259.29μg/mL and 1573.53μg/mL, the reducing power of per gram flavonoids of peony flower was equivalent to 213.07mg of ascorbic acid and 993.67mg of rutin.