Fig. 3

Effects of aeration or/and 50 μM CdCl₂ treatments on net O₂ and Cd²⁺ fluxes in the roots of rice seedling. a Time-course of Net O₂ flux on the surface of root at 500 μm from root apex (elongation zone); b Time-course of Net Cd²⁺ flux on the surface of root at 500 μm from apex (elongation zone); c Statistical results of steady-state net O₂ and Cd²⁺ fluxes on the surface of root at 500 μm from apex (elongation zone); d Time-course of Net O₂ flux on the surface of root at 200 μm from root apex (meristematic zone); e Time-course of Net Cd²⁺ flux on the surface of root at 200 μm from apex (meristematic zone); f Statistical results of steady-state net O₂ and Cd²⁺ fluxes on the surface of root at 200 μm from apex (meristematic zone); g Time-course of Net O₂ flux in the xylem of root at 500 μm from root apex (elongation zone); h Time-course of Net Cd²⁺ flux in the xylem of root at 500 μm from apex (elongation zone); i Statistical results of steady-state net O₂ and Cd²⁺ fluxes in the xylem of root at 500 μm from apex (elongation zone). The 3-week-old rice seedlings under hydroponic culture were aerated with air pump (30 min per hour) in the absence or presence of 50 μM CdCl₂ for 14 d. The values are means ± SE (n = 100). Different letters on bar indicate significant differences at P < 0.05