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Metabolomic analysis of saponin difference among the root tissues in P. quinquefolius and P. notoginseng. (A) OPLS–DA score plots of P. quinquefolius. (B) One-way ANOVA of P. quinquefolius. (C) OPLS–DA score plots of P. notoginseng. (D) One-way ANOVA of P. notoginseng. ANOVA, analysis of variance; OPLS–DA, orthogonal partial least squares-discriminant analysis.
