Fig. 1.

Time-dependent response of Chl a fluorescence in the dark-adapted state and photosynthetic ETR upon LL/HL transfer of wild-type and mutant plants. Col-0 (circles), tpt-2 (squares), adg1-1 (triangles), and adg1-1/tpt-2 (diamonds) plants were grown for 3 weeks under LL and long-day conditions. The plants were transferred to HL at t=0 (4h in the light). The maximum quantum yield of ETR through PSII is reflected by the F _v/F _m ratio (A). The ETR (B) was determined at a PFD of ~300 μmol m^–2 s^–1. The data represent the mean ±SE of n=3 replicates. In some cases, the error bars are smaller than the symbols. (This figure is available in colour at JXB online.)