Figure 3. Bracteole photosynthetic and stomatal response to CO_2. (i) Measured photosynthetic response (A) of ten bracteoles to intercellular CO₂ concentration (C_i). Solid line indicates A/C_i curve predicted assuming light saturating conditions (>1500 µmol m^-2 s^-1) and constant VPD (0.5kPa). Inset: measured (A) and predicted (A’) rates of photosynthesis under identical conditions with an idealised 1:1 line. (ii) Measured (g_s) and predicted stomatal conductance (g_s’)