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.