Reevaluating the free-ion activity model of trace metal availability to higher plants


The plant uptake and toxicity of many metals show a marked dependence on the aqueous speciation of the metal, and these responses often correlate best with the activity of the free metal ion. Exceptions to this generalization have been observed, however, and we sought to critically reexamine the theoretical foundation of the free-ion activity model (FIAM… (More)
DOI: 10.1023/A:1004249923989