Fig. 3 in Assessing the diversity of anthocyanin composition in various tissues of purple corn (Zea mays L.)

Fig. 3. Principal component analysis (PCA) and hierarchical cluster analysis of various pigmented maize tissues. A) The first two principal components (PCs) grouped by tissue type. Each point represents the anthocyanin composition of a single sample as analyzed on the UHPLC. Arrows indicate eigen vectors for compounds with identities in Table 2. B) The same PCA grouped by Ward's Minimum Variance Method for clustering. Each star represents the composition of the extract used to represent each cluster for chromatograms (Fig. 4) and tristimulus color values (Fig. 6). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)