In this study, the effect of a mycorrhizal symbiosis on the translocation of Cd from Cd-polluted soil to sorghum roots was investigated using rhizoboxes. A factorial experiment (two factors including fungus inoculation and Cd contamination) in a completely randomized design with three replicates was performed. In the rhizobox rhizosphere compartment, plants were cultivated in uncontaminated soil and mycorrhizal inoculation (inoculated with Claroideoglomus etunicatum or non-inoculated) was performed, and in the other compartment, the soil was contaminated with Cadmium (Cd) at one of three levels (0, 100 mg kg⁻¹ using a non-toxic organic polymer (poly (N-vinyl succinate))–Cd, or 100 mg kg⁻¹ using Cd-nitrate). Cd pollution resulted in a significant decrease in shoot dry weight (from 7.52 to 6.18 and 6.68 g pot⁻¹, from control to polymer-Cd and nitrate-Cd respectively), root mycorrhizal colonization (from 32.33% to 8.16% and 8.33%), shoot phosphorus concentration (from 3.14 to 2.80 and 2.76 g kg⁻¹), and soil carbohydrate (from 12.05 to 10.74 and 10.24 mg g⁻¹), and also resulted in significant increases in soil glomalin (from 595.55 to 660.52 and 690.39 μg g⁻¹). The use of mycorrhizal fungi increased the glomalin content of the soil and improved the studied parameters. The results revealed the key role of Claroideoglomus etunicatum in translocation of Cd in the rhizobox and also in precise control of Cd concentration of plant tissues (increase or decrease of them depending on Cd composition and Cd availability). Poly(N-vinyl succinate) increased Cd availability and Cd concentration of shoot tissue (5.19 mg kg⁻¹) compared to nitrate-Cd (3.68 mg kg⁻¹) and could be recommended for improving phytoremediation.

中文翻译：

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一种无毒的聚合物可增强高粱-菌根共生对Cd的生物修复作用。

在这项研究中，使用根瘤菌研究了菌根共生对Cd从Cd污染土壤向高粱根部迁移的影响。在一个完全随机的设计中进行了一个因子分析实验（两个因素，包括真菌接种和Cd污染），一式三份。在根际箱的根际区隔中，将植物种植在未污染的土壤中，并进行菌根接种（接种或未接种克拉克球藻），而在另一个隔室中，土壤则被三种水平之一的镉（Cd）污染（0） ，100毫克千克^-1使用无毒的有机聚合物（聚（ñ -乙烯基琥珀酸酯）） -镉，或100mg千克^-1使用硝酸镉）。Cd污染导致茎干重显着减少（分别从7.52降低至6.18和6.68 g盆^-1，分别从对照降至聚合物Cd和硝酸盐Cd），根菌根定植（从32.33％降至8.16％和8.33％） ，芽磷浓度（从3.14到2.80和2.76 g kg ^-1）和土壤碳水化合物（从12.05到10.74和10.24 mg g ^-1），还导致土壤胶质蛋白显着增加（从595.55到660.52和690.39μg） g ^-1）。菌根真菌的使用增加了土壤中的gloomalin含量并改善了研究参数。结果揭示了Claroideoglomus etunicatum的关键作用在根际盒子中镉的转运，以及精确控制植物组织中镉的浓度（取决于镉的组成和镉的利用率，它们的增加或减少）。聚（Ñ -乙烯基琥珀酸酯）增加的CD的可用性和芽组织的浓度Cd（5.19毫克千克^-1）相比于硝酸镉（3.68毫克千克^-1）和可建议用于改善植物修复。