Figure 3.

Effect of Cd²⁺ exposure on the sulfate content of maize roots. Plants were grown for 24 or 48 h in a complete nutrient solution supplemented (black bars) or not (white bars) with 10 μm CdCl₂. At different times, roots were excised from shoots, rinsed with distilled water, and homogenized. The sulfate content was measured turbidimetrically. Bars and error bars are means and se of two experiments run in quadruplicate (n = 8).