Figure 1. Relative change in morphological parameters (per plant) that influence reproductive onset and outcrossing as a function of recent and projected increases in CO₂ concentration (µmol mol⁻¹) for a wild and cultivated rice population.

* indicates a significant difference at the P<0.05 level as a function of a given CO₂ concentration between populations; different letters indicate a significant difference in the degree of CO₂ enhancement for the measured parameter (e.g. height). Bars are ±SE.