Heavy metal (HM) contamination of the soil through anthropogenic activities influences the living systems and drastically impacts food chain. This study examined the application of silver nanoparticles (AgNPs) in two genotypes (G1 and G2) of Mung bean (Vigna radiata) for ameliorating the Pb toxicity. Different doses of Pb (0, 25, 50 μM) were differentially tackled by AgNPs with the aim of ameliorating the plant attributes. Both genotypes displayed statistically significant quantitative and qualitative modulations for Pb tolerance. In G2, the most prominent increase in plant height (43.79%), fresh biomass (49.56%) and total chlorophyll (20%) was observed at L2 (AgNPs 10 mg/L) in comparison with the control. Overall, photosynthetic rate was increased by 26% in G2 at L6 (AgNPs 25 mg/L + Pb 25 μM). In addition, the results presented 78.5% increase in water use efficiency of G2 while G1 experienced a maximum internal CO₂ concentration (209.8%) at L8 (Pb 50 μM). AgNPs triggered balanced uptake of minerals and improved growth of Vigna genotypes. 50 μM Pb was most hazardous and caused maximum reduction in growth of Vigna plants along with a significant suppression in photosynthetic activity, increase in MDA (199.7%) in G1 and H₂O₂ (292.8%) in G2. In comparison to control, maximum superoxide dismutase (376%), peroxidase (659.8%) and catalase (9.3%) activity was observed in G2 at L11. The application of AgNPs substantially enhanced plant growth and helped them in surviving well in absence as well as presence of Pb. G2 genotype exhibited substantial tolerance capability and revealed less impairment in the studied attributes than G1 and treatment of AgNPs i.e. 25 mg/L was the best level that yielded best results in both genotypes. The results demonstrate that AgNPs mediate response(s) of plants under Pb stress and particularly contributed to HM tolerance of plants and thus showing great promise for use in phytoremediation.

人为活动对土壤的重金属 (HM) 污染会影响生命系统并严重影响食物链。本研究探讨了银纳米粒子 (AgNPs) 在绿豆 ( Vigna radiata)两种基因型 (G1 和 G2) 中用于改善 Pb 毒性的应用。AgNPs 对不同剂量的 Pb（0、25、50 μM）进行了差异处理，目的是改善植物属性。两种基因型都显示出对 Pb 耐受性具有统计学意义的定量和定性调节。在 G2 中，与对照相比，在 L2 (AgNPs 10 mg/L) 观察到植物高度 (43.79%)、新鲜生物量 (49.56%) 和总叶绿素 (20%) 的最显着增加。总体而言，在 L6 的 G2 中，光合速率增加了 26%（AgNPs 25 mg/L + Pb 25 μM ）. 此外，结果显示 G2 的用水效率提高了 78.5%，而 G1在 L8 (Pb 50 μM) 处经历了最大的内部 CO 2 浓度 (209.8 % ₎。AgNPs 触发了矿物质的平衡吸收并改善了豇豆基因型的生长。50 μM Pb 是最危险的，会导致豇豆植物生长的最大减少，同时显着抑制光合活性，增加 G1 和 H ₂ O _{2中的 MDA (199.7%)}（292.8%）在 G2 中。与对照相比，在 L11 的 G2 中观察到最大超氧化物歧化酶 (376%)、过氧化物酶 (659.8%) 和过氧化氢酶 (9.3%) 活性。AgNPs 的应用显着增强了植物的生长，并帮助它们在缺铅和存在铅的情况下都能很好地生存。G2 基因型表现出显着的耐受能力，并且在所研究的属性中显示出比 G1 更少的损害，并且 AgNPs 的处理，即 25 mg/L 是在两种基因型中产生最佳结果的最佳水平。结果表明，AgNPs 介导植物在 Pb 胁迫下的反应，尤其有助于植物对 HM 的耐受性，因此在植物修复中显示出巨大的应用前景。