Figure 3.

Uptake and translocation of nitrate and sugar levels in seminal roots with progressing plant age. A, Nitrate uptake rate and root-to-shoot translocation rate of labeled nitrogen. Seminal roots of different plant age were exposed to 1 mm ¹⁵N-labeled KNO₃ for 20 min. B, Concentrations of Suc, Fru, and Glc in seminal roots of hydroponically grown barley plants that were examined weekly from 18 to 53 d after germination (dag). Symbols represent means ± se. ns, not significant. Different letters indicate significant differences among means according to Tukey’s test at P < 0.05 (n = 6 independent biological replicates).