AI+200 and AI+160 were short-term (one
growing season) abrupt increase of [CO2] by
~200 μmol mol-1 and
~160 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 the relative change of
Fv/Fm (n=12) from predawn to other
moments calculated from equation 1.
Table 4 Correlation coefficient between quantum yield for electron
transport (φEo) and maximum photochemical efficiency PS
II (Fv/Fm) and probability that trapped
exciton moves an electron further than QA-(ψo) under different treatments of elevated
CO2 concentration [CO2].