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. 2020 Feb 25;183(1):137–151. doi: 10.1104/pp.19.01447

Figure 2.

Figure 2.

Salicin-7-sulfate and salirepin-7-sulfate concentrations in leaves (dark gray bars) and roots (light gray bars) of different poplar and willow species. The compounds were extracted with MeOH from freeze-dried plant material and analyzed using LC-MS/MS. Means and se (n = 5–7) are shown. Asterisks indicate statistical significance between the two parts of the same species as assessed by paired t-test or Wilcoxon signed rank test (* P ≤ 0.05, ** P ≤ 0.01, and *** P ≤ 0.001). A, Salicin-7-sulfate: P. trichocarpa (P < 0.001, t = 34.372); P. × canescens (P < 0.001, t = 14.388); P. alba (P < 0.001, t = 18.303); P. simonii (P = 0.031, W = −21.00); S. purpurea (P = 0.029, t = 2.843); S. caprea (P = 0.047, W = −24.00). B, Salirepin-7-sulfate: P. trichocarpa (P < 0.001, t = 17.009); P. x canescens (P < 0.001, t = 25.130); P. alba (P < 0.001, t = 13.306); P. simonii (P < 0.001, t = 7.045); S. purpurea (P = 0.001, t = 5.531). dw, dry weight; nd, not detected.