Fig. 4

Changes of variables Fv/Fm (a) rETR_max (b) and E_k (c) were calculated from rapid light-response curves (see Fig. 3) caused by various Se concentrations (2.5, 8.5 and 25 mg Se per g of DW) after 72 h of experiments. The effect of various light intensities of 250, 500 and 750 µmol photons m⁻² s⁻¹ in the presence of exposure to 16 mg g⁻¹ selenium on Fv/Fm (d) rETR_max(e) and E_k (f) variables is shown after 72 h. Control means no Se addition