ArticlePlants (Basel, Switzerland)2026
Iron Deficiency Reduces Cadmium Translocation in Peanut by Increasing the Root Cell Wall Reservoir.
Article in Plants (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Iron (Fe) deficiency and cadmium (Cd) contamination often co-occur in agricultural systems, yet the way in which Fe deficiency modulates Cd translocation remains unclear. Here, we investigated root cell wall modifications mediating Cd accumulation in two peanut cultivars with contrasting Fe deficiency tolerance. Fe deficiency significantly increased root Cd concentrations in both cultivars but reduced Cd translocation to shoots, an effect more pronounced in the tolerant cultivar Silihong. Cell wall analysis revealed cultivar-specific compositional changes: pectin and cellulose increased under combined Cd exposure and Fe deficiency, while hemicellulose (HC1) decreased. Negative correlations between Fe and Cd accumulation in roots, cell walls, and their components indicate competition between these two metal ions for binding sites in root cell walls. Increased pectin content under combined stress enhances Cd sequestration, while reduced HC1 content facilitates Fe mobilization to shoots. Transcriptomic analysis identified hub genes associated with cell wall modification, including pectinesterases (
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