State Key Laboratory of Urban Water Resource and Environment, School of Environmental, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
State Key Laboratory of Urban Water Resource and Environment, School of Environmental, Harbin Institute of Technology, 73 Huanghe Road, Harbin 150090, PR China.
J Hazard Mater. 2022 Aug 5;435:128991. doi: 10.1016/j.jhazmat.2022.128991. Epub 2022 Apr 22.
Phytoremediation is a promising and sustainable technology to remediate the risk of heavy metals (HMs) contaminated soils, however, this way is limited to some factors contributing to slow plant growth and low remediation efficiency. As soil beneficial microbe, arbuscular mycorrhizal fungi (AMF) assisted phytoremediation is an environment-friendly and high-efficiency bioremediation technology. However, AMF-symbiotic formation and their functional expression responsible for HMs-polluted remediation are significantly influenced by edaphic fauna. Earthworms as common soil fauna, may have various effects on formation of AMF symbiosis, and exhibit synergy with AMF for the combined remediation of HMs-contaminated soils. For now, AMF-assisted phytoremediation incorporating earthworm coexistence is scarcely reported. Therefore, the main focus of this review is to discuss the AMF effects under earthworm coexistence. Effects of AMF-symbiotic formation influenced by earthworms are fully reviewed. Moreover, underlying mechanisms and synergy of the two in HMs remediation, soil improvement, and plant growth were comprehensively elucidated. Phenomenon of "functional synergism" between earthworms and AMF may be a significant mechanism for HMs phytoremediation. Finally, this review analyses shortcomings and prescriptions in the practical application of the technology and provides new insights into AMF- earthworms synergistic remediation of HMs-contaminated soils.
植物修复是一种有前途和可持续的技术，可以修复重金属（HM）污染土壤的风险，然而，这种方法受到一些因素的限制，这些因素会导致植物生长缓慢和修复效率低下。作为土壤有益微生物，丛枝菌根真菌（AMF）辅助植物修复是一种环保高效的生物修复技术。然而，AMF-共生的形成及其对 HM 污染修复的功能表达受到土壤动物的显著影响。蚯蚓作为常见的土壤动物，可能对 AMF 共生的形成产生各种影响，并与 AMF 协同作用，对 HM 污染土壤进行联合修复。到目前为止，很少有关于蚯蚓共存的 AMF 辅助植物修复的报道。因此，本综述的主要重点是讨论蚯蚓共存下 AMF 的作用。充分回顾了受蚯蚓影响的 AMF 共生形成的影响。此外，还综合阐述了两者在 HM 修复、土壤改良和植物生长中的作用机制和协同作用。蚯蚓和 AMF 之间的“功能协同作用”现象可能是 HM 植物修复的一个重要机制。最后，本综述分析了该技术实际应用中的缺点和处方，并为 AMF-蚯蚓协同修复 HM 污染土壤提供了新的见解。
