Figure 6.

Photosynthetic rate of transgenic rice overexpressing OsRbcS1. A, Dependence on C_i of photosynthetic CO₂ assimilation rate. The CO₂ assimilation rate of the uppermost fully expanded leaves at vegetative growth stage was measured at a PPFD of 1,500 µmol m^–2 s^–1, leaf temperature of 28°C, and CO₂ partial pressures ranging from 4.5 to 88 Pa. B, Magnified figure of Figure 6A at low C_i. C, Initial slope of CO₂ assimilation rate as a function of C_i and CO₂ assimilation rate at C_i of approximately 60 Pa. The values were calculated by the data of Figure 6B. Data represent means ± sd of five biological replicates. Different letters above the bars indicate significant difference (P < 0.05) between lines determined by Tukey’s test. NT, Nontransgenic rice.