Fig. 5.

Responses of CO₂ assimilation rate to increasing intercellular [CO₂]. Examples of A–C _i curves measured in C₃, C₃–C₄, and C₄ species grown at glacial (180 μl l^–1, inverted open triangles) or ambient (400 μl l^–1, filled triangles) [CO₂]. Values represent the means ±SE of three replicates.