Summary of the immediate changes in ion transport in response to Fe deficiency. Squares were used to depict transporters with decreased and circles transporters with increased abundances. Yellow symbols represent changes that were observed only after 24 h of Fe deficiency, whereas the grey symbols were observed at both 6 and 24 h. The genes encoding the proteins shown are: COPT2 (At3g46900, ), OPT3 (At4g16370, ), IRT1 (At4g19690, ), IRT2 (At4g19680, ), Ferroportin (At5g26820, ), FRO3 (At1g23020, ), ZIP3 (At2g32270, ), MTPc3 (At3g58060, ), MTPa2 (At3g58810, ), IREG2 (At5g03570, ), ZIF1 (At5g13740, ), CCC1-like (At3g25190  and NRAMP4 (At5g67330, ). The subcellular localization has been experimentally demonstrated for COPT2, IRT1, MTPa2, IREG2 and NRAMP4. Localization of the other proteins is hypothetical and was assumed according to their predicted function.