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Fig. 4. Response of leaf carbon exchange rate to alteration in photosynthetic photon flux (CER vs. PPF) of young fully expanded leaves of Dara-5 and wild-type potato plants measured (a) during vegetative growth (19 and 20 DAE), (b) at the beginning of flowering (33 and 34 DAE), (c) after attainment of three-quarters of leaf mass (47 and 48 DAE), and (d) at the cessation of leaf growth (75 and 76 DAE) in the greenhouse experiment. Each data point represents the mean of four measurements performed during different time periods within a day at CO2 partial pressure outside the leaf = 35 Pa. Vertical bars represent ±1 SE of the mean where these exceed the size of the symbol.
