FIGURE 9.

Effects of DMTU on steady Ca²⁺ and Cd²⁺ fluxes in roots of ectomycorrhizal (MAJ and NAU) and non-mycorrhizal (NM) Populus × canescens under Cd²⁺ stress. Ectomycorrhizal (MAJ and NAU) and NM P. × canescens plants were subjected to 0 or 50 μM CdCl₂ for 24 h in the presence or absence of 5 mM DMTU. Ca²⁺ (A) and Cd²⁺ (B) fluxes were measured along root axes, 100–2,300 μm from the apex, at intervals of 200–300 μm. Each point is the mean of 4–5 individual plants and bars represent the standard error of the mean. Inserted sections show the mean flux rates and different letters, a, b, c, and d, indicate significant difference at P < 0.05 between treatments.