A new model involving ethylene, nitric oxide and Fe to explain the regulation of Fe-acquisition genes in Strategy I plants

► Nitric oxide enhances the expression of Fe-acquisition genes in roots. ► Nitric oxide enhances the expression of ethylene synthesis genes in roots. ► Ethylene enhances nitric oxide production in roots. ► Both ethylene and nitric oxide influence ferric reductase activity. ► A new model involving ethylene, nitric oxide and Fe to explain Fe-acquisition in Strategy I plants.