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<p>Cadmium (Cd) contamination in agricultural soils poses a significant health risk to crops through uptake, especially in leafy vegetables like <i>Brassica chinensis</i> L. This study investigated the combined effects of foliar application of selenium (Se) and calcium-aluminum hydrotalcites (CaAl-LDHs) on Cd mitigation, plant growth, and the underlying mechanisms involving antioxidant defense and gene expression regulation in Cd-contaminated soils. Results showed that combined remediation (LS) of Se and CaAl-LDHs exhibited the highest efficiency in Cd reduction, decreasing Cd content by 64.32% in aboveground parts and 38.52% in belowground parts of <i>Brassica chinensis</i> L., significantly surpassing the effects of individual applications. LS treatment also alleviated Cd-induced oxidative stress, as evidenced by enhancing activities of antioxidant enzymes (SOD, CAT, POD) and reducing accumulation of H<sub>2</sub>O<sub>2</sub> and MDA. Transcriptome analysis further revealed that LS treatment upregulated key genes involved in Cd transport (ABCC14, ABCG32, ZFP1) and quality regulation (SUS3, CS-L, UCH), thereby enhancing both Cd tolerance and nutritional quality. Notably, while CaAl-LDHs alone caused biomass reduction, the combined LS strategy mitigated this negative effect, achieving a balance between Cd detoxification and maintained plant productivity. These results suggest that Se and CaAl-LDHs have synergistic effects in Cd immobilization and transcriptional regulation, providing a practical strategy for the remediation of Cd-contaminated farmland without compromising crop yield.</p> Graphical Abstract <p></p>

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Synergistic Effects of Selenium and CaAl-LDHs on Cadmium Detoxification in Brassica Chinensis L.: Physiological and Transcriptomic insights

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Xinying Zhang,
  • Yan Liu,
  • Zhiqun Chen,
  • Beibei Li,
  • Xiaoyan Liu,
  • Ying Hao,
  • Tiehua Cao,
  • Xiaoliang Mi,
  • Yizhuo He

摘要

Cadmium (Cd) contamination in agricultural soils poses a significant health risk to crops through uptake, especially in leafy vegetables like Brassica chinensis L. This study investigated the combined effects of foliar application of selenium (Se) and calcium-aluminum hydrotalcites (CaAl-LDHs) on Cd mitigation, plant growth, and the underlying mechanisms involving antioxidant defense and gene expression regulation in Cd-contaminated soils. Results showed that combined remediation (LS) of Se and CaAl-LDHs exhibited the highest efficiency in Cd reduction, decreasing Cd content by 64.32% in aboveground parts and 38.52% in belowground parts of Brassica chinensis L., significantly surpassing the effects of individual applications. LS treatment also alleviated Cd-induced oxidative stress, as evidenced by enhancing activities of antioxidant enzymes (SOD, CAT, POD) and reducing accumulation of H2O2 and MDA. Transcriptome analysis further revealed that LS treatment upregulated key genes involved in Cd transport (ABCC14, ABCG32, ZFP1) and quality regulation (SUS3, CS-L, UCH), thereby enhancing both Cd tolerance and nutritional quality. Notably, while CaAl-LDHs alone caused biomass reduction, the combined LS strategy mitigated this negative effect, achieving a balance between Cd detoxification and maintained plant productivity. These results suggest that Se and CaAl-LDHs have synergistic effects in Cd immobilization and transcriptional regulation, providing a practical strategy for the remediation of Cd-contaminated farmland without compromising crop yield.

Graphical Abstract