Fig. 6.

WSC content, NO₃^– uptake, and Lp1-FEH, LpNRT1.1, and LpNRT2.1b expression in roots with 6 h of supplemental glucose. Plants were grown in HN conditions and supplied with 0.1% or 1% glucose 42 h after defoliation. After 6 h, the impact of supplemental 0.1% or 1% glucose treatment on: (A, B) the relative abundance (in carbon units) of water-soluble carbohydrate (WSC); (C) NO₃^– uptake rate; and (D–F) Lp1-FEH, LpNRT1.1, and LpNRT2.1 expression in roots. Values are means ±SE (n=5 pools of five plants each). Means were tested for significance using a two-tailed t-test. Asterisks denote significantly different means between mannitol (grey) and glucose (black) treatment (*P<0.05, **P<0.01, ***P<0.001).