The ecological role of arbuscular mycorrhizal fungi (AMF) on altering cadmium (Cd) migration in polluted soil is still unresolved. The present experiment aimed to clarify whether AMF can reduce Cd loss due to leaching at different Cd concentrations (0, 5, 10, and 15 mg L⁻¹) with maize as a host plant cultured in a sand column. The effects of the arbuscular mycorrhizal fungus Funneliformis mosseae on the root morphology, exudate content, and Cd uptake by maize and Cd loss due to leaching were investigated. The AMF altered the root morphology and exudate content of the maize, resulting in increases in the root length, volume, surface area, tips and branch number and in the contents of soluble sugars, proteins, and amino acids in the root exudates, and the AMF increased maize biomass and Cd uptake by 22.0–31.0%. Moreover, the AMF significantly increased the contents of total and easily extractable glomalin-related soil protein (GRSP), increased Cd adsorption by sand particles and decreased the Cd concentration in the solution at a depth of 20 cm, resulting in a 67.5–97.2% decrease in the Cd loss due to leaching from the sand column. Furthermore, the root exudate content was very significantly positively correlated with Cd adsorption by the sand particles. Root length was significantly positively correlated with Cd uptake by the maize roots, but the average root diameter was very significantly negatively correlated with Cd uptake by maize. Thus, the AMF altered Cd migration by increasing the contents of GRSP and exudates and root morphology, which contributed to reducing the Cd concentration in the solution and Cd loss due to leaching from the sand column. Taken together, these results indicated that AMF serve an ecological function in reducing Cd loss due to leaching from polluted soil.

丛枝菌根真菌 (AMF) 在改变污染土壤中镉 (Cd) 迁移方面的生态作用仍未得到解决。本实验旨在阐明 AMF 是否可以减少由于在不同 Cd 浓度（0、5、10 和 15 mg L ^-1）下浸出而导致的 Cd 损失，玉米作为在沙柱中培养的寄主植物。丛枝菌根真菌Funneliformis mosseae的作用研究了玉米根部形态、渗出液含量和 Cd 吸收以及浸出引起的 Cd 损失。AMF 改变了玉米的根部形态和渗出液含量，导致根长、体积、表面积、尖端和分枝数量以及根系分泌液中可溶性糖、蛋白质和氨基酸的含量增加，并且AMF 使玉米生物量和 Cd 吸收增加了 22.0-31.0%。此外，AMF显着增加了总的和易提取的glomalin相关土壤蛋白（GRSP）的含量，增加了沙粒对Cd的吸附，并降低了20 cm深度溶液中的Cd浓度，导致67.5-97.2%由于从砂柱中浸出而导致的 Cd 损失减少。此外，根系分泌物含量与沙粒对 Cd 的吸附呈极显着正相关。根长与玉米根对Cd的吸收呈显着正相关，但平均根直径与玉米对Cd的吸收呈极显着负相关。因此，AMF 通过增加 GRSP 和渗出液的含量以及根部形态来改变 Cd 迁移，这有助于降低溶液中的 Cd 浓度和由于从沙柱中浸出而导致的 Cd 损失。综上所述，这些结果表明 AMF 在减少因污染土壤浸出而导致的 Cd 损失方面具有生态功能。AMF 通过增加 GRSP 和渗出液的含量以及根部形态来改变 Cd 迁移，这有助于降低溶液中的 Cd 浓度和由于从沙柱中浸出而导致的 Cd 损失。综上所述，这些结果表明 AMF 在减少因污染土壤浸出而导致的 Cd 损失方面具有生态功能。AMF 通过增加 GRSP 和渗出液的含量以及根部形态来改变 Cd 迁移，这有助于降低溶液中的 Cd 浓度和由于从沙柱中浸出而导致的 Cd 损失。综上所述，这些结果表明 AMF 在减少因污染土壤浸出而导致的 Cd 损失方面具有生态功能。