Figure legends
Fig 1. Air temperature and photosynthetic photon flux density
(PPFD) at each observation time during jointing, heading and grain
filling stages.
Fig. 2 Diurnal variation
of maximum photochemical efficiency of PSII
(Fv/Fm) under different treatments of
CO2 concentration [CO2] elevation.
(a) and (d) were measured at jointing stage, (b) and (e) at heading
stage, and (c) and (d) at grain filling stage. AI+160and AI+200 and 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 Fv/Fm between two treatments
at the same time points are indicated by +, * and ** forp <0.1, p <0.05 andp <0.01.
Fig. 3 Correlation
between maximum photochemical efficiency of PSII
(Fv/Fm) and photosynthetic photon flux
density (PPFD) and air temperature (n=32) at jointing (a, d), heading
(b, e) and grain filling stage (c, f). 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. Values are
probability levels for significant
differences.
Fig.4Diurnal variation of efficiency that trapped exciton moves an electron
further than QA- in rice under different treatment of
CO2 concentration [CO2] elevation.
(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 ψo between two models at the same time are
indicated by +, * and ** for p <0.1,p <0.05 and p <0.01.
Fig.
5 Diurnal variation of electron transport quantum yield
(φEo) in rice under different treatment of
CO2 concentration [CO2] elevation.
(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 φEo between two models at the same time are
indicated by +, * and ** for p <0.1,p <0.05 and p <0.01.
Fig. 6 Diurnal variation
of performance index (PIABS) in rice under different
treatment of CO2 concentration [CO2]
elevation. (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+200were 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 PIABS between two models at the same time are
indicated by +, * and ** for p <0.1,p <0.05 and p <0.01.