Fig. 5.

Relationships between (A) stomatal conductance at an ambient CO₂ concentration of 370 μmol mol⁻¹, (B) rates of photosynthesis at an intercellular CO₂ concentration of 280±2 μmol mol⁻¹, and (C) Rubisco content and the leaf nitrogen content of the flag leaf at the heading stage in Takanari (filled circles) and Koshihikari (open circles) grown in 12.0 l pots. Measurements were taken when a panicle of a main stem emerged completely. Vertical and horizontal bars represent the standard deviation (n=5). Values of r₁ and r₂ represent correlation coefficients for Takanari and Koshihikari, respectively, and asterisks *** represent significance at the 0.1% level.