Fig. 1.

a Stomatal conductance (g_s) plotted as a function of net assimilation rate (A_n). b Stomatal conductance plotted as a function of fluorescence parameter 1 − q_L. Red symbols indicate measurements performed at CO₂ concentration in the cuvette of 380 µmol mol⁻¹, 100% red light, purple symbols indicate measurements at CO₂ of 1000 µmol mol⁻¹, 90% red 10% and blue light. Solid and dashed lines show linear regressions and 95% confidence intervals, respectively. Error bars indicate standard errors (n = 6–7 biological replicates)