e. Graphical representation of the average number of cell divisions along epidermis (ep) and cortex (co) in 5 DAG root tips 12 HAT to ammonium or nitrate supplemented media. Data are derived from 15 and 17 roots. The statistical significance was evaluated with ANOVA at p<0.05. The box chart components are defined as; box (25%-75%), central band (median line), central box (mean) and the range is within 1.5IQR. 