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IRON NUTRITION INFLUENCE ON CADMIUM ACCUMULATION BY ARABIDOPSIS THALIANA (L.) HEYNH
Citation:
Rodecap, K., D. Tingey, AND E. Lee. IRON NUTRITION INFLUENCE ON CADMIUM ACCUMULATION BY ARABIDOPSIS THALIANA (L.) HEYNH. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/291 (NTIS PB94191178), 1994.
Description:
Greenhouse experiments were conducted to determine whether Arabidopsis thaliana (L.) Heynh, a putative Fe-efficient species, accumulated higher concentrations of Cd from a sparingly soluble Cd source (cadmium dihydrogen phosphate) when growing in Fe-deficient rather than in Fe-sufficient conditions. he Arabidopsis plants, which were grown in double-container, vermiculite-hydroponic plot culture systems and were provided with nutrient solution containing either sufficient (89.5 uM) or deficient (O uM) Fe supplied as the diethylene triamine pentaacetate chelate, were exposed to four levels of Cd (nominally 0-, 0.45, 0.89, or 1.78 mmol kg-1 vermiculite). Analysis of the uptake of other elements by Arabidopsis suggests that the greater accumulation of Cd by plants in the Fe-deficient treatment may be a consequence of the species' Fe-efficiency mechanisms. ur results support the hypothesis that uptake of toxic elements by Fe-efficient species can be enhanced when the plants are growing in Fe-deficient soils.
