Abstract

The severe cadmium (Cd) pollution of soil adversely affects food safety and human health. To prevent phytotoxicity and Cd accumulation in agricultural products, effective steps must be taken immediately. In the study, we added different concentrations (10, 50, and 250 mg/kg) of α-Fe₂O₃ nanoparticles (NPs) into Cd-contaminated soil, investigating the effects of α-Fe₂O₃ NPs on Cd toxicity. The various physiological indicators, such as antioxidant system, the distribution of Cd and the content of active ingredients in different parts of muskmelon were detected. The results revealed that α-Fe₂O₃ NPs greatly reduce Cd transport in plants and minimize Cd toxicity. Specifically, 250 mg/kg α-Fe₂O₃ NPs treatment reduced the root Cd content by 30.19% and 50 mg/kg α-Fe₂O₃ NPs treatment reduced the stem Cd content by 38.75%. For the content of active ingredients, 50 mg/kg α-Fe₂O₃ NPs treatment increased root polysaccharide content and leaf saponin content by 14.45 and 27.71%, respectively. Overall, α-Fe₂O₃ NPs can reduce Cd stress in muskmelon. The current work gave a unique notion for Cd remediation in soil using α-Fe₂O₃ NPs as amendments.

中文翻译：

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α-Fe2O3纳米粒子对镉污染土壤甜瓜生理特性及活性成分的影响

摘要

土壤镉（Cd）污染严重，影响食品安全和人体健康。为了防止农产品产生植物毒性和镉积累，必须立即采取有效措施。在研究中，我们将不同浓度（10、50和250 mg/kg）的α-Fe ₂ O ₃纳米粒子（NPs）添加到Cd污染土壤中，研究α-Fe ₂ O ₃ NPs对Cd毒性的影响。检测了甜瓜不同部位的抗氧化系统、Cd分布及活性成分含量等各项生理指标。结果表明，α-Fe ₂ O ₃纳米粒子大大减少了植物中镉的转运并最大限度地减少了镉的毒性。其中,250 mg/kg α-Fe ₂ O ₃ NPs处理使根部Cd含量降低30.19%,50 mg/kg α-Fe ₂ O ₃ NPs处理使茎部Cd含量降低38.75%。活性成分含量方面，50 mg/kg α-Fe ₂ O ₃ NPs处理使根多糖含量和叶皂苷含量分别增加14.45%和27.71%。总体而言，α-Fe ₂ O ₃ NPs可以减少甜瓜中的Cd胁迫。_{目前的工作提出了使用 α-Fe 2} O ₃ NPs 作为改良剂修复土壤中 Cd 的独特概念。