Fig. 2.
Differential expression of Arabidopsis ferritin genes in response to exogenous signals. Iron excess treatment (Fe) leads to AtFer-1, -3 and -4 gene expression, whereas H2O2 application impacts positively only on the expression of the AtFer1 gene. Consistent with its seed-specific expression, the AtFer2 gene is the only Arabidopsis ferritin gene to be expressed in response to application of exogenous abscisic acid (ABA; Petit et al., 2001a).