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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