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Fig. 4. Soil total metal concentrations at the beginning of the experiment (T0) and at harvest. Shown values are the means and standard error of 10 replicate pots (at harvest one sample was taken per pot after soil homogenization). Note: if error bars are not visible they were too small to be plotted. WT, wild-type Indian mustard; APS, adenosine triphosphate sulfurylase–overexpressing Indian mustard; GS, glutathione synthetase–overexpressing Indian mustard; 
-ECS, -glutamylcysteine synthetase–overexpressing Indian mustard. The letters above the bars indicate statistically significant groups (t test, compairing each pair, 
= 0.05).
