Figure 1. Effects of elevated CO2 and Kinetin on the sink capacity of Koshihikari and Takanari. Sink capacity was defined as the product of spikelet density and thousand grain weight. CO2 concentrations are indicated by EC and AC for elevated and ambient, respectively. KN and CN indicate exogenous application of Kinetin and control. Bars indicate the SEM (n = 4). Significant effects of each factor were indicated by ***, P < 0.001; *, P < 0.05; ns, no significant.