309153.fig.004a
(a)
309153.fig.004b
(b)
Figure 4: Inverse relationship between Unk-21.03 and increasing partial pressures of atmospheric CO2. (a) Plants were grown for 21 ds at four different partial pressures of CO2 prior to analyzing for Unk-21.03. Values on the y-axis are integrated peak areas normalized by the mass of apical tissue in each sample. (b) The mass spectrum of Unk-21.03.