Figure 5: Effects of reversing the ambient and elevated CO2 treatments on metabolite levels in soybean apices. Sucrose (a) and Unk-21.03 (b) were measured in soybean apices using plants that were grown for a total of 24 d in the ambient (°) and elevated (●) CO2 treatments. Reciprocal transfers were performed 21 DAS by switching one-half the plants from ambient to elevated CO2 (Δ) and vice versa (▲). Values are means ± SE (n = 8).