School of Ecology and Environmental Sciences, Yunnan University, Kunming 650500, China.
State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.
Environ Pollut. 2023 Jan 1;316(Pt 1):120619. doi: 10.1016/j.envpol.2022.120619. Epub 2022 Nov 17.
Increasing industrial activity has led to a growing risk of arsenic (As) and cadmium (Cd) accumulations and biomagnifications in plants and humans. Arbuscular mycorrhizal fungi (AMF) have been extensively studied as a soil amendment owing to their capability to reduce the accumulation of As and Cd in plant tissues. However, a quantitative and data-based consensus has yet to be reached on the effect of AMF on As and Cd bioaccumulation and bioavailability. Here, a meta-analysis was conducted to quantitatively evaluate the impact of AMF using 1430 individual observations from 194 articles. The results showed that AMF inoculation caused a decrease in shoot and root As and Cd accumulation compared to control, and the reduction rates were affected by experimental duration, P fertilizer, AMF species, plant family, plant lifecycle, and soil properties. Intermediate experimental duration (lasting 56-112 days) and no P fertilizer favored AMF to reduce the shoot As and root Cd accumulation. Compared to other plant families, the reduction in As and Cd accumulation in legumes was the greatest, following AMF inoculation. The soils with alkaline, high organic carbon (OC), and low available phosphorus (AP) appeared to be more favorable for AMF to reduce As accumulation in plant tissues, while soils with low AP were more conducive to reducing the Cd accumulation in plant tissues. In addition, AMF inoculation increased pH (1.92%), OC (6.27%), easily-extractable glomalin-related soil protein (EE-GRSP) (29.36%), and total glomalin-related soil protein (T-GRSP) (29.99%), and reduced bioavailable As (0.52%) and Cd (2.35%) in soils compared to control. Overall, the meta-analysis provides valuable guidelines for the optimal use of AMF in different plant-soil systems.
工业活动的增加导致砷（As）和镉（Cd）在植物和人类中的积累和生物放大风险不断增加。丛枝菌根真菌（AMF）因其能够降低植物组织中 As 和 Cd 的积累而被广泛研究作为土壤改良剂。然而，关于 AMF 对 As 和 Cd 生物积累和生物有效性的影响，尚未达成定量和基于数据的共识。在这里，进行了一项荟萃分析，使用 194 篇文章中的 1430 个个体观测值来定量评估 AMF 的影响。结果表明，与对照相比，AMF 接种可降低地上部和根部的 As 和 Cd 积累，且降低率受实验持续时间、P 肥、AMF 种类、植物科、植物生命周期和土壤性质的影响。中等实验持续时间（56-112 天）和没有 P 肥有利于 AMF 降低地上部 As 和根部 Cd 积累。与其他植物科相比，接种 AMF 后，豆科植物的 As 和 Cd 积累减少最多。碱性、高有机碳（OC）和低有效磷（AP）的土壤似乎更有利于 AMF 降低植物组织中的 As 积累，而低 AP 的土壤更有利于降低植物组织中的 Cd 积累。此外，与对照相比，AMF 接种增加了 pH（1.92%）、OC（6.27%）、易提取的球囊霉素相关土壤蛋白（EE-GRSP）（29.36%）和总球囊霉素相关土壤蛋白（T-GRSP）（29.99%），并降低了土壤中的有效态 As（0.52%）和 Cd（2.35%）。总的来说，荟萃分析为在不同的植物-土壤系统中最佳利用 AMF 提供了有价值的指导。
