Figure 1.

Effects of high CO₂ on the accumulation of SA in two Arabidopsis ecotypes (Col-0 and Wassilewskija [Ws]) and three different crop species. Plants were grown in 16-h days at an irradiance of 200 µmol m⁻² s⁻¹ for 3 weeks either in air (400 µL L⁻¹; black bars) or at high CO₂ (hCO₂; 1,000 µL L⁻¹; white bars). Data are means ± se of four biological replicates. Numbers above the white bars indicate fold change for high CO₂-air. Significant differences between the conditions at P < 0.05 are indicated by asterisks. FW, Fresh weight.