School of Chemistry and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China; School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, China; Jiangsu Province Engineering Research Center of Environmental Risk Prevention and Emergency Response Technology, Nanjing, Jiangsu 210023, China.
School of Environment, Nanjing Normal University, Nanjing, Jiangsu 210023, China.
Sci Total Environ. 2024 Jun 10;928:172253. doi: 10.1016/j.scitotenv.2024.172253. Epub 2024 Apr 8.
Antimony (Sb) pollution poses a noteworthy risk to human health and ecosystem sustainability, therefore effective, eco-friendly, and widely accepted restoration methods are urgently needed. This study introduces a new approach of using La(III) foliar application on Solanum nigrum L. (S. nigrum), a cadmium hyperaccumulator, to improve its photosynthetic and root systems under Sb stress, resulting in a higher biomass. Notably, La(III) also enhances endocytosis in root cells, facilitating efficient and non-selective remediation of both Sb(III) and Sb(V) forms. The absorption of Sb by root cell endocytosis was observed visually with a confocal laser scanning microscope. The subcellular distribution of Sb in the cell wall of S. nigrum is reduced. And the antioxidant enzyme activity system is improved, resulting in an enhanced Sb tolerance in S. nigrum. Based on the existing bibliometric analysis, this paper identified optimal conditions for S. nigrum to achieve maximum translocation and bioconcentration factor values for Sb. The foliar application of La(III) on plants treated with Sb(III), Sb(V), and a combination of both resulted in translocation factor values of 0.89, 1.2, 1.13 and bioconcentration factor values of 11.3, 12.81, 14.54, respectively. Our work suggests that La(III)-enhanced endocytosis of S. nigrum root cells is a promising remediation strategy for Sb-contaminated environments.
锑（Sb）污染对人类健康和生态系统可持续性构成重大风险，因此迫切需要有效、环保且广泛接受的修复方法。本研究介绍了一种新方法，即在镉超富集植物龙葵（S. nigrum）上叶面喷施镧（La（III）），以提高其在 Sb 胁迫下的光合作用和根系活力，从而获得更高的生物量。值得注意的是，La（III）还增强了根细胞的内吞作用，从而高效且非选择性地修复 Sb（III）和 Sb（V）形态。通过共聚焦激光扫描显微镜可以直观地观察到 Sb 被根细胞内吞吸收。龙葵细胞壁中 Sb 的亚细胞分布减少。同时，抗氧化酶活性系统得到改善，从而增强了龙葵对 Sb 的耐受性。基于现有的文献计量分析，本文确定了龙葵实现 Sb 最大迁移和生物浓缩系数的最佳条件。叶面喷施 La（III）处理 Sb（III）、Sb（V）以及两者混合处理的龙葵，其迁移因子值分别为 0.89、1.2、1.13，生物浓缩系数值分别为 11.3、12.81、14.54。我们的工作表明，La（III）增强龙葵根细胞的内吞作用是一种有前景的 Sb 污染环境修复策略。
