Cadmium-Zinc Interrelationships in Tomato Plants

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Abstract
A possible interaction between various concentrations of Cd and Zn was investigated in intact and split-root tomato plants in sand culture. The addition of Cd to the substrate enhanced Zn uptake into tomato foliage, resulting in increased phytotoxicity. Zn additions to the substrate did not affect Cd uptake. There was no evidence that the elements acted competitively. Inasmuch as the enhancement effect was observed when Cd and Zn solutions were added separately to plants, the interaction must have occurred within rather than outside the plant. The uncontaminated root in split-root plants probably could continue to function normally.
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