Figure 6. Metabolite responses of the wild type after transition to ambient air.

Plants were grown in HC and transferred to LC with a continuous short-day photoperiod of 10/14 h throughout the experiment. Leaves of three individual plants were harvested 2 h before and 4 h after light was switched off in high-CO₂ conditions (HC) and 1, 3 and 5 days after HC-to-LC transition. Relative metabolite contents ± SD are shown with the corresponding wild-type content at HC arbitrarily set to 1, separately for day and night values (white bars, day values; black bars, night values). Asterisks show significant changes to the corresponding wild-type HC control according to the two-tailed Student's t-test (p<0.05). The full data set is shown in Table S1.