Figure 5.

¹³C and ¹H (insert) spectra of cellular Glc (A) and Suc (B). Maize root tips were incubated for 25 h with d-[1-¹³C]Glc 200 mm. Glc and Suc were purified and analyzed by ¹H- and ¹³C-NMR as described in “Materials and Methods.” Gciα, Gciβ, Sgi, and Sfi correspond to the resonance of the carbon i of Glc-α and Glc-β, the glucosyl and fructosyl moieties of Suc, respectively. For the studied carbon atoms, the enrichment values were obtained as described in “Materials and Methods” and reported on the right of the spectra. The spectra are representative of one labeling experiment repeated four times.