Overview
This pot study tested cerium dioxide (CeO₂) nanoparticles and a chromium-resistant bacterium (Staphylococcus aureus) for alleviating chromium stress in sunflower grown on Cr-contaminated soil. It is upstream mechanism evidence on chromium soil-to-plant transfer and stress mitigation; it reports no retail food occurrence and is context-only for Heavy Metal Index purposes.
Key numbers
- Sunflower grown in Cr-contaminated soil at 0, 25, and 50 mg/kg; CeO₂ NPs applied at 0, 25, 50 mg/L, with and without S. aureus.
- CeO₂ NPs improved growth/biomass, reduced oxidative stress, and raised enzymatic activity under Cr stress; S. aureus further enhanced the effect, the maximum benefit being the combined treatment.
- At Cr 50 mg/kg with CeO₂ 50 mg/L: chlorophyll a rose from 1.2 to 2.0 and chlorophyll b from 0.5 to 0.8 (mg/g FW), and electrolyte leakage fell from 121% to 104%.
Methods (brief)
Factorial pot experiment crossing soil Cr level, CeO₂ nanoparticle dose, and S. aureus inoculation; growth, oxidative-stress markers, pigment content, and enzyme activities measured in sunflower.
Implications
Certification: Contributes nothing to HMT&C threshold pools. Mechanism context on chromium (including hexavalent Cr) toxicity and amendment-based mitigation; route as exposure/mechanism context to Soil-to-plant transfer of heavy metals, Chromium, and Agronomic mitigation.
Courses: Example of nanoparticle- and microbe-assisted alleviation of chromium stress in a crop plant.
App: No contamination_profile blocks are touched.
Microbiome: WikiBiome federation signpost — chromium-resistant bacterial inoculant modulating metal stress.
Related evidence
Update history
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