Phosphorus-arsenic interaction mitigates toxicity and accumulation of arsenic in rice grown in contaminated fields.
Shukla K, Pathak SK, Banerjee S, Srivastava S
Phytoremediation
Rice you buy at the grocery store may have been grown in arsenic-contaminated soil, and this research shows that a simple fertilizer adjustment — more phosphorus — can meaningfully cut the arsenic that ends up on your dinner plate.
Arsenic is a toxic metal that sneaks into rice plants through the same doorways the plant uses to absorb phosphorus, a nutrient it needs to grow. Scientists found that flooding rice soil with extra phosphorus essentially crowds arsenic out, so less of it gets into the grain we eat. The catch is that some rice varieties are better at making use of that extra phosphorus than others, so picking the right variety matters just as much as the fertilizer dose.
Key Findings
Elevated phosphorus fertilizer levels reduced arsenic accumulation in rice grains by competing with arsenic for the same root transport pathways.
Phosphorus also improved overall crop yield in arsenic-contaminated fields, making it a dual-benefit intervention for food safety and food security.
Phosphorus-use efficiency was variety-specific, meaning the protective effect of phosphorus depended on which rice cultivar was grown.
chevron_right Technical Summary
Adding extra phosphorus fertilizer to rice paddies in arsenic-contaminated soil significantly reduces how much arsenic ends up in the grain, while also boosting yield. The effect varies by rice variety, meaning the right combination of fertilizer rate and variety selection is key to growing safer rice in polluted fields.
Abstract Preview
The study shows that strategic intensification of phosphorus serves as a dual-function mechanism for effectively reducing arsenic movement to grains in rice and boosting crop yield. However, phosph...
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