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Principal component snalysis (PCA) and hierarchical cluster analysis on root, rhizome, leaf, flower, stem and seed groups. (a) Scores plot, (b) Loading plot, (c) Hierarchical cluster analysis of all samples. PCA and Hierarchical cluster analysis using all of the 4309 ion signals. Scores plot and loading plot of PCA model gives 2D visual information about the variations among different groups. Unsupervised PCA score plots showing the discrimination of samples. R2 = 0.741, Q2 = 0.621.
