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Table 3 Mean nitrogen concentrations (μmol g dw-1± SE; N = 75) of roots, stems, leaves and cuttings of Populus balsamifera L. hydroponically grown with nitrate or ammonium

From: Quantifying remobilization of pre-existing nitrogen from cuttings to new growth of woody plants using 15N at natural abundance

  Tissue nitrogen concentration (μmol g dw-1)
  Nitrate Ammonium
Root 2.50 ± 0.04 2.55 ± 0.03
Stem 0.41 ± 0.01 0.76 ± 0.03
Leaf 1.84 ± 0.03 2.19 ± 0.04
Cutting start 0.83 ± 0.01 0.83 ± 0.02
Cutting end 0.59 ± 0.03 0.71 ± 0.02