FIGURE 4.

Cd concentration and changes of cell wall components between Ph2-23 and Tor-1 with or without 10 μM CdCl₂ treatment for 4 days. (A) Cd concentrations of CW components. (B–D) Cellulose, hemicellulose, pectin concentration in shoots. (E) PME activity in shoots. Ctl means control treatment, with normal culture conditions; Cd means treatment with CdCl₂. Data presented are means of four measurements (n = 4), and different letters indicate means are significantly different (P < 0.05), two (**) asterisks indicate significant differences from the control at P < 0.01, ns, differences are not significant.