FIGURE 3.

Photosynthetic characteristics of wild-type (Ws-2, Col-0) and mutant plants defective in the TPT and XPT. In (A) false-colour images of F_o and the F_v/F_m-ratios are displayed for plants grown for 20 days under LL- (PFD = 30 μmol⋅m^-2⋅s^-1) or for 12 days under HL-conditions (PFD = 300 μmol⋅m^-2⋅s^-1) in the long-day, or for 43 days under SL-conditions (PFD = 150 μmol⋅m^-2⋅s^-1) in the short-day. For the latter details of the fluorescence distribution or of F_v/F_m-ratios are depicted (lower panel). In (B,C) induction and light curves, respectively, of relative ETR are shown for wild-type plants, the xpt-1, tpt-1, and tpt-2 single mutants as well as for tpt-1/xpt-1, and tpt-2/xpt-1 double mutants and an amiRNA:XPT overexpressor in the tpt-2 background grown under HL-conditions. The actinic light during the induction of photosynthesis was set to a PFD of 281 μmol⋅m^-2⋅s^-1. As an additional control the adg1-1/tpt-2 double mutant was included in this experiment.