Figure 3.

Far-red light reversibility of red light-stimulated opening in WT and npq1 stomata. Stomata were exposed to 10, 50, or 100 μmol m^-2 s^-1 background red light for 1.5 h. Ten micromoles per meter squared per second red and 100 μmol m^-2 s^-1 far-red (+Red/Far red) light were then added to the red background light for an additional 1 h. Data plotted are the difference between average aperture values before and after addition of light to the red background and are the results from three experiments (30–40 stomata per experiment) ± se of the mean. Change in aperture in WT stomata caused by an additional 1 h of 10 μmol m^-2 s^-1 red is shown for comparison (wt + Red).