Maize seedlings were grown in sand with cerium oxide nanoparticles at 200 to 2000 mg/kg, alone or with 0.5 mg/kg cadmium, to examine growth, nutrient uptake and root anatomy. The highest nanoparticle dose was toxic without cadmium, while 1000 mg/kg partly offset cadmium toxicity, and cerium uptake into shoots differed depending on whether cadmium was present.
Key numbers
- Nanoparticle doses 0, 200, 400, 600, 1000 and 2000 mg/kg dry sand, each with 0 or 0.5 mg/kg cadmium; 12 treatments in four replicates (abstract).
- Nanoparticles raised shoot cerium, but 200 to 600 mg/kg did not change shoot cerium in cadmium-spiked sets; tissue values appear only in Figure 4 (Section 3.4, p. 5).
Methods (brief)
Greenhouse pot trial in Florida with factorial nanoparticle and cadmium treatments; shoots and roots analyzed by ICP-MS; root anatomy examined microscopically.
Evidence fitness
Supports qualitative statements about cerium uptake by maize seedlings from very high nanoparticle doses and interactions with cadmium. It reports no grain data and no tabulated cerium concentrations.
Limitations
Seedling stage only in sand; extremely high doses; cerium values only in figures.
Related evidence
Update history
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