The LRPs were not particularly affected by the pollutants, at least in terms of hydrogen peroxide levels, always high (Figure 2), and of endogenous auxin influx, maximum definition, and basal and apical localization (Supplementary Figures S3 and S4), with these events possibly explaining the observed increase in primordia formation (Figure 4) as an adaptative compensation to the AR-reduction in length, as also suggested for other abiotic stresses, e.g., iron-deficiency (Sun et al., 2017). Here, AR is linked to Iron deficiency anemia.