Figure 5.

Leaf dry matter δ¹³C, determined on the entire leaf opposite to the one used for gas exchange and enzyme analysis, plotted against changes in online carbon isotope discrimination (Δ¹³C). The white symbols are wild-type plants and the black symbols are anti-CA plants. All plants were germinated and grown in a glasshouse under ambient atmospheric CO₂ conditions. The plants with extremely low δ¹³C values (•) were transferred to the 1% CO₂ growth cabinets after tissue was collected for Δ¹³C analysis.