Fig. 1.

Effect of Cd (0.1–1000 μM) on the endogenous growth (μm cm⁻¹) of maize coleoptile segments. The elongation of a stack of 21 segments was measured as described in Materials and Methods. The growth of maize coleoptile segments after 7 h is shown (2 h of preincubation in control medium plus 5 h of incubation with Cd). The inset shows Cd dependence of endogenous growth as a function of time. After preincubation (2 h) of coleoptile segments in control medium, Cd was added (arrow). Values are means of ten independent experiments. Bars indicate means ± SEs. Statistical analysis (using software Statistica) showed that differences between values of elongation growth for control and 1.0 μM Cd²⁺ were statistically not significant at 420 min (LSD test P < 0.05)