Light induction of CO₂ assimilation rate, stomatal conductance, and intercellular pCO₂ in two wild-type plants (black symbols) and two progeny of T1 transformant A47b#6 (white symbols). Leaves were kept in the dark overnight by wrapping the leaves in foil. Leaves were acclimated in the dark in the leaf chamber at pCO₂ of 380 μbar and a leaf temperature of 28°C for 10 min before irradiance was increased to 2,000 μmol quanta m⁻² s⁻¹. Inset, Example of increase in PEPC phosphorylation in wild type after foil was removed from a leaf at midday and leaf was exposed to 1,500 μmol quanta m⁻² s⁻¹.