Fig. 1. Seed germination and plant development in artificially contaminated soils. The mean percentage of seed germination and the mean root and shoot dry weight of 12 plants (4
from each pot) for each treatment, for each growth stage ± standard deviation are reported. A seed was defined germinated once the primary root first protruded. The percentages
reported were calculated on a total of 72 seeds (24 per pot). *Statistically different from the control.