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<p>This study investigated the effects of different concentrations of zinc (Zn) and selenium (Se) on antioxidant enzyme activity and mercury (Hg) transport/accumulation in rice seedlings under Hg stress through hydroponic experiments. The results demonstrated that combined Zn–Se application significantly enhanced physiological performance and Hg sequestration compared to individual treatments, with low-to-medium concentrations (10–40&#xa0;mg/L Zn + 0.0005–0.002 mmol/L Se) exhibiting optimal efficacy. The synergistic treatment (40&#xa0;mg/L Zn + 0.002 mmol/L Se) improved chlorophyll content, upregulated SOD, CAT, and GSH activities (GSH increased by 51.7%), and minimized Hg translocation and accumulation (reduced by 34.95% and 35.06%, respectively). These findings highlight the potential of Zn–Se co-application as a strategy to mitigate Hg toxicity in rice.</p>

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The Impact of the Combined Application of Zinc and Selenium on the Physiological Mechanisms and Mercury Accumulation in Rice Under Mercury Stress

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • Qiu Huang,
  • Jing Liu,
  • Wanyu Li,
  • Anqi Xu,
  • Rui Wu,
  • Fanxin Qin

摘要

This study investigated the effects of different concentrations of zinc (Zn) and selenium (Se) on antioxidant enzyme activity and mercury (Hg) transport/accumulation in rice seedlings under Hg stress through hydroponic experiments. The results demonstrated that combined Zn–Se application significantly enhanced physiological performance and Hg sequestration compared to individual treatments, with low-to-medium concentrations (10–40 mg/L Zn + 0.0005–0.002 mmol/L Se) exhibiting optimal efficacy. The synergistic treatment (40 mg/L Zn + 0.002 mmol/L Se) improved chlorophyll content, upregulated SOD, CAT, and GSH activities (GSH increased by 51.7%), and minimized Hg translocation and accumulation (reduced by 34.95% and 35.06%, respectively). These findings highlight the potential of Zn–Se co-application as a strategy to mitigate Hg toxicity in rice.