Figure 4.

Growth and photosynthetic parameters of the GO lines. A and B, Rosette diameter (A) and flowering time (B) of plants grown at 75 μmol quanta m⁻² s⁻¹ and at ambient atmospheric CO₂ concentration (380 μL L⁻¹). C, ETR of plants grown for 35 d at 75 μmol quanta m⁻² s⁻¹ and at ambient atmospheric CO₂ concentration (380 μL L⁻¹). D, ETR of plants grown for 14 d at 75 μmol quanta m⁻² s⁻¹ and at ambient atmospheric CO₂ concentration (380 μL L⁻¹) and then transferred to 4,000 μL L⁻¹ CO₂ for 21 d. The values presented in A, C, and D are means ± se of at least eight plants each. The values presented in B were obtained by counting the number of bolted plants (70 plants per line in total) at the end of each week. Asterisks indicate significant differences from wild-type (wt) values calculated by Student's t test (P < 0.05). A representative experiment from two biological replicates is presented in each case.