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Table 1 Mean measured and, for new tissues, adjusted root, stem, leaf and cutting δ 15 N values (‰ ± SE; N = 75) of Populus balsamifera L. hydroponically grown with nitrate (58.5‰) or ammonium (−0.96‰)

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

  Nitrate Ammonium
  Measured δ15N
Plant 49.04 ± 0.43 −5.81 ± 0.16
Root 44.42 ± 0.42 −8.59 ± 0.15
Stem 47.08 ± 0.40 −6.62 ± 0.18
Leaf 50.10 ± 0.44 −5.07 ± 0.15
Cutting start 0.87 ± 0.35 0.97 ± 0.31
Cutting end 23.47 ± 0.88 −3.10 ± 0.23
  Adjusted δ 15 N
Plant 52.68 ± 0.26 −6.43 ± 0.19
Root 47.87 ± 0.28 −9.45 ± 0.19
Stem 50.76 ± 0.26 −7.29 ± 0.19
Leaf 54.01 ± 0.25 −5.59 ± 0.18