Supporting information
Table S1 Significance levels of difference and relative change in probability that trapped exciton moves an electron further than QA-o) between predawn and other observation time points under different treatments of elevated CO2 concentration [CO2].
Table S2 Significance levels of differences and relative change in the electron transport quantum yield (φEo) between predawn and other observation time points under different treatments of elevated CO2 concentration [CO2].
Table S3 Significance levels of differences and relative changes in the performance index (PIABS) between predawn and other observation time points under different treatments of elevated CO2 concentration [CO2].
Fig. S1 Diurnal variation of minimum fluorescence (Fo) in rice under different treatments of elevated CO2 concentration [CO2]. (a) and (d) were jointing stage, (b) and (e) were heading stage, and (c) and (d) were grain filling stage. AI+160 and AI+200 were short-term (one growing season) abrupt increase of [CO2] by ~160 μmol mol-1 and ~200 μmol mol-1, respectively. CI: constant increase of [CO2] by ~200 μmol mol-1 based on ambient [CO2] for four generations. SI: stepwise increase of [CO2] for four generations with the [CO2] being ~40, 80, 120 and 160 μmol mol-1 higher than ambient in each generation. Data is mean ± SE (n=12). Significance levels of Fo between two treatments at the same time were indicated by +, * and ** for p<0.1, p<0.05 and p<0.01.
Fig. S2 Diurnal variation of fluorescence at J-step (Fj) in rice under different treatments of elevated CO2 concentration [CO2]. (a) and (d) were measured at jointing stage, (b) and (e) were measured at heading stage, and (c) and (d) were observed at grain filling stage. AI+160 and AI+200 were short-term (one growing season) abrupt increase of [CO2] by ~160 μmol mol-1 and ~200 μmol mol-1, respectively. CI: constant increase of [CO2] by ~200 μmol mol-1 based on ambient [CO2] for four generations. SI: stepwise increase of [CO2] for four generations with the [CO2] being ~40, 80, 120 and 160 μmol mol-1 higher than ambient in each generation. Data is mean ± SE (n=12). Significance levels of Fj between two models at the same time were indicated by +, * and ** for p<0.1, p<0.05 and p<0.01.