Figure 5.

Comparison of MDA content under Zn²⁺ or Cd²⁺ stress. (a) MDA content of transgenic and WT tobacco under different concentrations of Zn²⁺. (b) MDA content of transgenic and WT tobacco under different concentrations of Cd²⁺. WT: Wild-type tobacco. N13, N14, N24: Three homozygous transgenic tobacco lines (T₂). The 4−week−old WT and transgenic plants were treated under Zn²⁺ (0, 300, or 900 mg/kg) or Cd²⁺ (0, 100, or 200 mg/kg) for 3 weeks, respectively. Asterisks indicate the significant difference between transgenic lines and WT (*, p < 0.05; **, p < 0.01; ***, p < 0.001).