Fig. 3.
Changes in leaf nitrogen content (A) and the rate of leaf photosynthesis at an ambient CO2 concentration of 370 μmol mol−1 (B) of the uppermost fully expanded leaf in Takanari (filled squares) and Koshihikari (open squares) grown in 12.0 l pots. Measurements at heading were taken when a panicle of a main stem emerged completely. Vertical bars represent the standard deviation (n=5). For explanations of I, II, III, IV, V, and asterisks, see the legend of Fig. 1.