Interactions of Fe, Mn, Zn, and Cd in Soil-Rice Systems: Implications for Reducing Cd Accumulation in Rice

文献类型： 外文期刊

第一作者： Zhang, Yan

作者： Zhang, Yan;Wang, Han;Yu, Linfei;Li, Chunfu;Shao, Guosheng;Jiang, Su;Ding, Liqun

作者机构：

关键词： cadmium; micronutrient; acidic and alkaline soils; translocation factor; correlation

期刊名称：TOXICS （ 影响因子：4.1； 五年影响因子：4.6 ）

ISSN：

年卷期： 2025 年 13 卷 8 期

页码：

收录情况： SCI

摘要： Cadmium (Cd) contamination in rice (Oryza sativa L.) poses serious health risks for human, necessitating effective mitigation strategies. This study investigated the effects of Cd stress on iron (Fe), manganese (Mn), zinc (Zn), and Cd accumulation and translocation in rice varieties with high (MY46) or low (ZS97B) Cd accumulation capacities grown in acidic and alkaline soils. Results demonstrated that Cd stress significantly inhibited plant growth, reducing plant height, shoot biomass, and grain yield in both soil types. Cd accumulation increased in roots, shoots, and grains, while Fe, Mn, and Zn concentrations decreased markedly. Molecular analysis revealed upregulation of metal transporter genes (OsIRT1, OsNRAMP1, OsNRAMP5) and the vacuolar sequestration gene (OsHMA3) in roots under Cd exposure. The translocation factor (TF) values of Mn and Zn from root to shoot were reduced in acidic soils, whereas Mn and Zn TFs exhibited an increasing trend in alkaline soils despite Cd exposure. Furthermore, correlation analyses indicated Mn and Zn play crucial roles in suppressing Cd accumulation in both acidic and alkaline soils. These findings provide critical insights for developing soil-specific strategies to reduce Cd accumulation in rice through micronutrient management.

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