Fig. 2. Zinc and Cu concentrations in the shoots and roots of barley, pea, and sunflower. Shoot contents are plotted upward, roots contents downward. Where indicated, contents in plants grown in uncontaminated soil were multiplied for better visibility. Bars for shoot contents show the standard deviation from 4 replicates (pots). Root contents were determined from one pot only. Different labels indicate means that differ significantly from each other (LSD test; p = 0.005; on log-transformed data).