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Killing Two Birds With One Stone: Iron Biofortification as a Strategy for Enhancing Nutritional Value and Reducing
1Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan, China.
Plant, Cell & Environment
|June 5, 2026
Summary
Improving rice nutrition is crucial. This study explores iron (Fe) and cadmium (Cd) interactions to develop strategies for low-Cd, high-Fe rice, enhancing human health and food safety.
Area of Science:
- Agricultural Science
- Environmental Science
- Human Nutrition
Background:
- Rice is a staple food low in iron (Fe) and prone to accumulating cadmium (Cd) in polluted soils.
- Iron deficiency can increase cadmium uptake, while cadmium accumulation can worsen iron deficiency.
- Optimizing iron levels is key to mitigating cadmium accumulation in rice grains.
Purpose of the Study:
- To review and integrate current knowledge on cadmium-iron interactions in paddy soils and rice plants.
- To identify strategies for biofortifying rice with iron while minimizing cadmium accumulation.
- To improve the nutritional value and safety of rice grains.
Main Methods:
- Literature review integrating soil and plant mechanisms of Cd-Fe interaction.
- Analysis of Fe's influence on Cd bioavailability in paddy soils.
- Examination of plant-level competition for transporters and gene regulation.
Main Results:
- In soils, iron levels and water management significantly affect cadmium bioavailability via adsorption, complexation, and coprecipitation.
- In plants, iron competes with cadmium for uptake transporters, and iron status influences cadmium transporter gene expression.
- Enhanced iron supply can mitigate cadmium accumulation through specific interactions.
Conclusions:
- Understanding Cd-Fe interactions is vital for developing low-Cd, high-Fe rice.
- Strategies include genetic breeding and agronomic practices to enhance iron and reduce cadmium.
- Further research should prioritize knowledge gaps to improve rice's nutritional quality and safety.
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