Figure 2.

The responses of A_n (A–C) and G_s (D–F) measured under control, ambient condition; e[CO₂], eCO₂ concentration; warming, elevated air temperature; e[CO₂] plus warming, the combination of elevated air temperature and [CO₂] during the stages of tillering, anthesis and grain filling. SH, HJ and LJ refer to three rice cultivars Shishoubaimao, Hejiang 19, and Longjing 31, respectively. Values are the means ± SEs (n = 6). Different lower-case letters indicate significant differences between treatments at P < 0.05 level. A_n , net photosynthetic rate; G_s , stomatal conductance.