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Table 3 Amine group containing metabolites identified in the phloem of wheat as measured by LC-MS collected at two maturities ( n =4), unless otherwise stated mean and standard error of all quantitated metabolites are reported as mMol L -1

From: Metabolite profiling of wheat (Triticum aestivum L.) phloem exudate

Metabolite Mean SE
Ammonia (ISTD RR) 33.8 1.275
Glutathione (ISTD RR) 0.58 0.0905
Glutamine 170.8 50.895
Valine 75.5 17.52
Histidine 64.7 25.24
Serine 63.1 25.455
Glutamate 36.3 15.32
Arginine 39.8 3.74
Alanine 42.0 6.045
Proline 21.2 8.125
Phenylalanine 58.1 18.365
Threonine 49.7 15.515
Isoleucine 44.3 11.275
Leucine 43.7 16.34
Tryptophan 44.1 8.405
Lysine 48.0 10.315
Glycine 39.9 18.275
Tyrosine 27.7 9.495
Aspartic acid 18.7 7.205
Methionine 18.8 8.31
Asparagine 7.4 2.77
β-Alanine 1.7 0.595
GABA 1.1 0.45
Ornithine 1.2 0.58
Citrulline (μmol L-1) 232.3 39.14
Nicotianamine (μmol L-1)* 255.4 96.71
Cysteine (μmol L-1) 70.9 13.91
4-Hydroxy-proline (μmol L-1) 38.5 9.675
  1. Metabolites that were measured but did not have an external standard are reported as a ratio of response in relation to the internal standard (ISTD RR). *n = 3, outlier was removed.