Fig. 5

Effect of indole acetic acid inhibitors supply on wheat plants under iron deficiency (a) Phytosiderophores (PS) release by Fe-sufficient (+Fe), Fe-starved (-Fe), and Fe-starved plants treated with PCIB (200 μM) or TIBA (50 μM); in μM (assuming a Fe-PS chelation 1:1) per g of root fresh weight. Harvests were performed at 4, 72 and 96 h of treatment, which corresponded to the three columns per treatment. Average of 3 replicates with 20 plants each. p < 0.05 (Fisher LSD test). b Relative root TaNAAT gene expression in Fe-sufficient (+Fe), Fe-starved (-Fe), and Fe-starved plants treated with PCIB (200 μM) or TIBA (50 μM). Harvests were performed at 4, 72 and 96 h of treatment, which corresponded to the three columns per treatment. Average of 3 replicates with 20 plants each. p < 0.05 (Tukey HSD test)