Figure 2
CO2 assimilation (A ) and photosynthetic parameters evaluated by the chlorophyll fluorescence analysis of the change in the internal CO2 concentration (Ci) in rice leaves. (a) shows the results of A in rice plants grown under 0.06 and 0.6 mM Pi conditions, and (e) shows the results of A in rice plants grown under 0.6 to 3.0 mM Pi conditions. The results of the 0.6 mM Pi treatment are the same in (a) and (e). (b), (c), and (d) show the results of Y(II), Y(NPQ), and Y(NO), respectively, in the rice plants grown under 0.06 and 0.6 mM Pi conditions. (f), (g) and (h) shows the results of Y(II), Y(NPQ), and Y(NO) in rice plants grown under 0.6 to 3.0 mM Pi conditions. The results of 0.6 mM Pi are the same in (b) and (f), (c) and (g), and (d) and (h). (i) shows the initial slope ofA toward the increase in Ci under low Ci conditions. (j) shows the Fv/Fm in rice leaves grown under different Pi application conditions. These results are expressed as mean ± SD (n = 4-6). Different alphabets in (i) and (j) indicate significant differences among different Pi application conditions (Tukey-Kramer’s HSD test, p < 0.05).