Figure 3. Measurements of (a) photosynthesis rate (A), (b) stomatal conductance (g _s), (c) mesophyll conductance (g _m), and (d) intrinsic transpiration efficiency (A/g _s) in control and water-stressed leaves of the seven Oryza sativa genotypes.

The measurements were made on the flag leaf in saturating PPFD (1400 µmol m⁻²s⁻¹), with relative humidity ranging between 45–55%, and a leaf temperature of 30°C. Data are means of 4 to 7 plants per treatment. Error bars as in Figure 1. Different letters denote significant differences among means derived using a factorial ANOVA and Tukey post-hoc test.