Figure 10.

Copper affects the flowering and stress tolerance of RD20-overexpressing and knock-out lines compared with their respective controls. A, Growth was estimated by recording the relative stem length of the transgenic lines versus their respective controls after 7 weeks of growth in the presence of 485 µg Cu²⁺ g⁻¹ soil. B, The degree of stress of such lines was estimated by measuring their relative anthocyanin contents versus their respective controls. All experiments were repeated three times; data are means ± se. Treatment with copper was statistically different from water-treated controls when analyzed by Student’s t test (*P < 0.05, **P < 0.01). fw, Fresh weight.