Figure 4.

Gas‐exchange and fluorescence analysis of wild‐type (WT) O. sativa and three transgenic lines expressing enzymes of the C₄ metabolic pathway. (a) A, net CO₂ assimilation rate; g_{s_H2O}, leaf stomatal conductance to water vapour; ETR/4, light‐driven electron transport rate through PHotosystem II divided to four, measured at different intercellular pCO₂ (C_i), PPFD of 1500 µmol m^‐2 s^‐1 and ambient pO₂ (20 kPa). Parameters determined by fitting the A‐C_i response curves and statistical analysis are provided in Table 2. (b) Leaf CO₂ compensation point (Г). Mean ± SE, n = 5 biological replicates for WT, n = 4 otherwise. Statistical analysis was performed using one‐way ANOVA and Tukey’s post hoc test, letters indicate significant differences between the groups (α > 0.05) .