Fig. 1.
Changes in chlorophyll fluorescence in dark-adapted leaves under moderately elevated temperature at 30 °C. a the maximal PSII efficiency (Fv/Fm), (b) maximal Chl fluorescence (Fm), (c) minimal Chl fluorescence (Fo), (d) maximal variable Chl fluorescence (Fv), (e) the correlation of Fm and Fv with Fo and (f) the daily Fv/Fo ratio changes in Col WT and (salk033047) FtsH11 mutant over a 5 day 30 °C-treatment. The first data point in (a) and the data point at the 0d represent the data collected from 21 °C-grown plants prior to the onset of heat treatment. Three-week old Col WT and FtsH11 mutant (salk033047) plants grown at 21 °C 70 μmol with 12 h/12 h d/n cycle were transferred to a 30 °C growth chamber. Changes in dark-adapted chlorophyll fluorescence were determined daily for five days. For each sampling point, the most recently matured leaves from 6 to 8 plants were used. The experiments were repeated 4 times. Each data point represents mean ± SD