Figure 2.

Photosynthetic parameters in leaf 5 of tobacco. CO₂ response curves are shown for A (A–E), ETR (F–J), NPQ (K–O), and 1 − qP (P–T) in B8 (A, F, K, and P), B7 (B, G, L, and Q), the wild type (C, H, M, and R), RI9 (D, I, N, and S), and RI29 (E, J, O, and T). Data are shown for well-watered ACO₂-grown plants (white circles), well-watered ECO₂-grown plants (black circles), ACO₂-grown plants experiencing a moderate water deficit (white squares), and ECO₂-grown plants experiencing a moderate water deficit (black squares). Measurements were done at saturating irradiance (1,600 PPFD). Each experiment included single individuals for each plant line and growth condition. Data are means ± se of five independent experiments (n = 5).