Table S2Amino acid concentrations (µM SE) in phloem exudates of WT and OX-MYB plants (35S-MYB28, 35S-MYB51, pSUC-MYB28, pSUC-MYB51). Different letters within each row indicate significant difference between the means as detected by the Tukey-Kramer (HSD) test (P ≤ 0.05).

35S-MYB51 / 35S-MYB28 / WT / pSUC-MYB51 / pSUC-MYB28
Ala / 2.840.37 a / 2.010.30 ab / 1.770.30 ab / 1.550.21 b / 1.840.23 ab
Ser / 3.350.55 a / 2.360.36 ab / 2.610.61 ab / 1.530.21 b / 2.220.34 ab
Pro / 0.210.03 a / 0.190.02 a / 0.20.04 a / 0.140.02 a / 0.180.04a
Val / 0.540.06 a / 0.500.05 a / 0.520.09 a / 0.410.07 a / 0.430.06 a
Thr / 2.560.29 a / 2.230.14 a / 1.630.29 a / 1.730.36 a / 1.630.27 a
Ile / 0.300.03 a / 0.280.02 a / 0.300.05 a / 0.220.04 a / 0.240.04 a
Leu / 0.300.04 a / 0.260.03 a / 0.310.06 a / 0.220.04 a / 0.240.04 a
Asp / 17.712.05 a / 12.110.99 a / 14.502.38 a / 10.911.69 a / 11.271.69 a
Glu / 11.241.31 a / 9.071.00 a / 11.051.96 a / 7.011.01 a / 7.961.22 a
Met / 0.0740.01 a / 0.0610.01 a / 0.0920.02 a / 0.0640.01 a / 0.0440.01 a
Phe / 0.1650.02 a / 0.1560.02 a / 0.1470.02 a / 0.1000.016 a / 0.1170.02 a
Arg / 0.300.06 a / 0.280.03 a / 0.230.05 a / 0.200.03 a / 0.240.05 a
Tyr / 0.1060.01 a / 0.0820.01 a / 0.1020.02 a / 0.0690.01 a / 0.0760.01 a
Asn / 6.560.65 a / 4.930.74 a / 4.800.76 a / 4.290.59 a / 6.040.95 a
Gln / 25.833.39 a / 22.863.49 a / 22.454.35 a / 20.003.50 a / 25.013.95 a
Trp
(Peak Area) / 208682441 a / 203911718 a / 318685514 a / 240123718 a / 324227012 a
Total AA (Excluding Trp) / 72.098.38 a / 57.386.78 a / 60.7210.47 a / 48.427.41 a / 57.538.51 a