Figure 6.

Response of CO₂ assimilation rate (A_n) to incident chloroplast CO₂ concentration (C_c) at 25°C and 1200 μmol photons m⁻² s⁻¹. Maximum rates of RuBP regeneration (J_max) and RuBP carboxylation (V_cmax) were calculated according to method of Long and Bernacchi (2003). Chloroplast CO₂ concentration at which RuBP carboxylation transitions to RuBP regeneration (C_trans), as determined by method of Yamori et al. (2010); Yamori et al. (2011). Solid symbol, A_n at atmospheric CO₂ concentration of 400 μmol mol⁻¹.