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Changes in leaf photosynthetic capacity as leaves age. A was measured at a range of PAR from 2000 to 0 µmol m−2 s−1 for leaves at each stage. Leaves were excised before sunrise and light-acclimated before measurement. Measurements were taken at stage A (closed circles), stage B/B1 (open circles), stage B2 (closed triangles), and stage C (open triangles). Error bars represent standard error.
