Figure 8.

Effect of other cations on root elongation of rice ‘Zhefu802’ and ‘Nipponbare’, and the adsorption ability of cell wall materials extracted from the root apex of rice ‘Zhefu802’ and ‘Nipponbare’ to metals. A, Three-day-old seedlings were exposed to 0.5 mm CaCl₂ solution (pH 4.5) containing 0, 25 μm CdCl₂, 10 μm LaCl₂, or 0.5 μm CuCl₂ for 24 h. Root length was measured before and after treatments. Error bars represent ±sd (n = 10). B, Cell wall materials (3 mg) were suspended with 1.5 mL of 2 μm CdCl₂, 2 μm LaCl₂, or 2 μm CuCl₂ for 1 h. Metal content in suspension solution before or after adsorption was determined by ICP-AES. Error bars represent ±sd (n = 3). *, Differences between cultivars at P < 0.05.