Abstract: In this study,DPPH and CUPRAC were used to determine the antioxidant activities of flower,cauline leaf and root of Gentiana straminea Maxim.In addition,the antioxidant activities of different organs were compared.The antioxidant activity analysis results indicated that the DPPH radical scavenging activities of flower,cauline leaf and root were lower than that of gallic acid.The IC₅₀ values of leaves,branch and fruit were 260,341.3 and 2920.6 μg/mL,respectively.TEAC values of CUPRAC of flower,cauline leaf and root were 0.127,0.108 and 0.019μg/mL,respectively.The flower,cauline leaf with root of G.straminea had some antioxidant activity.The antioxidant activities of different organs decreased in the order of flower>cauline leaf>root.

Key words: Gentiana straminea Maxim, antioxidant activity, DPPH, CUPRAC