Fig. 5. Prediction of genotypic response of flag leafAmax to elevated CO2 (Y axis) using improved variants of the proxy trait LSSR measured under ambient CO2 level. A: Proxy trait LSSRsink(400); B: Proxy trait LSSRsink*SPAD (400). Calculations of proxy traits are detailed in Table S1. The 95% confidence interval is provided for the correlations. Exp. 2, greenhouse.