Additionally, the application of exogenous SA in A. thaliana induces the expression of the YSL1 and YSL3 genes involved in iron translocation and homeostasis [110] On the other hand, iron deficiency also increases the SA content in shoots and roots of A. thaliana [111] Another background highlights that SA signaling through NPR1 does not affect the response to iron deficiency [112]. This evidence concerns the gene NPR1 and nutritional disorder.