Figure 9

The effect of transfer from elevated CO ₂ to ambient CO ₂ on the content of sugars in tobacco shoots. Plants were grown for 30 days in elevated CO₂ (3000 μmol mol^-1) and half were transferred to ambient CO₂ (350 μmol mol^-1) for 3 days. The results, μmol g^-1 dry mass, are means for three replicates ± SEM, open bars ■ for plants at elevated CO₂, solid bars ■ for plants after 3 days in ambient CO₂. Statistical evaluation in: Additional Files, Additional File 1 Tables S3 and S4.