Figure 7.

The CO₂ assimilation rate as a function of C_i modeled with kinetic parameters, contents, and activation state of Rubisco. The CO₂ assimilation rates at 28°C of nontransgenic rice and transgenic rice that express sorghum RbcS (SS5 and SS16) were calculated using the kinetic parameters, Rubisco content, and Rubisco activation level at PPFD of 1,000 μmol m⁻² s⁻¹ obtained in this study (summarized in Supplemental Table S1). However, K_o was assumed to be constant among plants and used the value of 410 μm determined in rice (Makino et al., 1985).