Abstract:

The organic solvent extraction of different organs of Clematis glauca Willd. in Xinjiang was performed for obtaining total flavonoids, and the extract obtained was tested for its reducing power and its abilities to scavenge hydroxyl, superoxide anion and DPPH free radicals using VC as the control. The order of reducing power of different organs of Clematis glauca Willd and VC from strong to weak was VC ＞ leaf ＞ flower ＞ fruit ＞ stem. The leaves of Clematis glauca Willd. was superior to the other three organs of the plant in hydroxyl and superoxide anion free radical scavenging capacities. As for the ability to scavenge DPPH free radicals, the four organs of the plant were ranked as follows: fruit ＞ flower ＞ leaf ＞ stem. In a word, the total falavonoids from Clematis glauca Willd. have some antioxidant activity and thus, deserve to be developed as functional products based on in-depth studies of their physiological functions.

Key words: Clematis glauca Willd., total flavonoid, reducing power, antioxidant activity