NPTXR and nutritional disorder: But it seems that this four pathways had no effect on the induction of iron deficiency in plants conferred by JZ-GX1 VOCs, because JZ-GX1 VOCs significantly suppressed the expression of YUC1, YUC8, NPR, ERF1, PDF1 that involved in auxin, ET, JA, and SA synthesis in plants under iron deficiency condition.