FIGURE 7.

Results of two-dimensional principal component analysis (2D-PCA) of photosynthetic parameters, biochemical markers and phytohormone levels in roots (A) and leaves (B) of Chinese cabbage (Chinese c.), white cabbage (White c.), and kale (Kale) in roots (A) and leaves (B) after 24 h exposure to 0 (control), 50, 100, and 200 mM NaCl. Green, blue, and red symbols indicate positions in the score plots of the photosynthetic markers (Figure 2), biochemical parameters (Figure 4), and phytohormones (Figure 5, 6), respectively. Round symbols indicate positions of the species’ positions following each of the treatments. The correlation matrix used, eigenvalues, factor loadings and factor scores are given in Supplementary Tables S6–S15.