Fig. 8.

PCA showing the distribution of the individuals based on the set of 91 proteins differentially regulated by the treatment. Squares represent the barycenter of the eight replicates per copper condition and (B) the barycenter of the 24 replicates per stem region. Represented is the expression profile of 91 proteins analyzed on 48 samples. In (A) (Cu1) 3 nM Cu, (Cu2) 30 nM Cu, (Cu3) 300 nM Cu, (Cu4) 1 µM Cu, (Cu5) 3 µM Cu and (Cu6) 10 µM Cu; in (B) red dots refer to apical samples and black dots to basal samples.