Morphological and physiological phenotypes of zat12-3 seedlings. A, Shoot Fe content. B, Root Fe reductase activity. C, Root H2O2 content. Seedlings of the indicated genotypes were grown for 10 d on Fe-sufficient (+Fe) or Fe-deficient (−Fe) medium. Error bars represent sd. Different letters indicate statistically significant differences (P < 0.05). DW, Dry weight; FW, fresh weight; WT, wild type.