FIGURE 3.

(A,B) Net CO₂ assimilation rate (A) in response to intercellular pCO₂ (Ci) and (C,D) photosynthetic photon flux density (PPFD). Measurements (A,B) were made at 2000 μmol photons m^–2 s^–1 under 21% O₂ (A,B) and 2% O₂ (B). Measurements (C,D) were made at a pCO₂ (C_a) of 400 μmol CO₂ mol air^–1. Values are means ± SE of three F₂ cross plants and three wild-type (WT) plants for quadruple comparisons and seven F₂ cross plants and four WT plants for quintuple comparisons. A Student’s t-test was performed for (C,D). Significant differences between WT and quintuple within PARi level are indicated by *P-value < 0.05, **P-value < 0.01, ***P-value < 0.001.