Quality Evaluation and Antioxidant Activity of Cultivated Gentiana siphonantha: An Ethnic Medicine from the Tibetan Plateau.

ABSTRACT: Gentiana species are widely used in traditional and modern medicine, and Gentiana siphonantha is an important medicinal representative. To evaluate the quality characteristics of cultivated G. siphonantha roots, the accumulation patterns of iridoid glycosides and antioxidant activities across different cultivation ages and harvest months were investigated. Five major iridoid glycosides were quantified, and antioxidant capacity was assessed through DPPH, ABTS, and FRAP assays. Quality was subsequently multidimensionally evaluated using principal component analysis (PCA), orthogonal partial least squares-discriminant analysis (OPLS-DA), membership function analysis, and entropy weight-TOPSIS analysis, and the relationship between iridoid glycoside content and antioxidant

SUBMITTER: Li J 

PROVIDER: S-EPMC12844228 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature