Table I.

Ammonium and amino acid concentrations in the phloem sap

NLNH4+UCL15
NH4+14.0 ± 3.7236.1 ± 30.141.2 ± 13.174.2 ± 14.2
Asp14.9 ± 2.97.7 ± 2.56.6 ± 1.58.6 ± 1.8
Asnnda8.4 ± 0.47.4 ± 1.22.4 ± 0.4
Ser25.6 ± 2.7116.2 ± 16.211.1 ± 1.613.0 ± 2.1
Glu15.3 ± 2.230.4 ± 1.95.7 ± 1.17.6 ± 0.7
Gln1.0 ± 0.134.7 ± 4.433.6 ± 4.456.6 ± 9.5
Pronda111.5 ± 15.630.2 ± 5.426.1 ± 4.2
Others74.8 ± 16.4115.8 ± 17.437.8 ± 6.439.5 ± 6.4
Total137.1 ± 29.8433 ± 53.1132.4 ± 22.8143.8 ± 23.1
  • Ammonium and aminoacids concentrations (nmol mL−1) in the phloem sap of NH4+ plants, NL plants, Fd-GOGAT antisense plants (L15), and untransformed control plants (UC). Values are the means ± sd.

  • a nd, Not detectable.