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PCA, PCoA, stacked charts, and matrix plot of leaf and flower (TPC, TFC, UPLC-Polyphenols, and antioxidant activity) at gradient altitude. PCA: principal component analysis; PCoA: principal coordinate analysis; HCA: hierarchical clustering analysis. DKRV1 to DKRV15: flowers samples; DKRL1to DKRL15: leaves samples.
