Contributions of ectomycorrhizal fungi in a reclaimed poplar forest (Populus yunnanensis) in an abandoned metal mine tailings pond, southwest China
文献类型： 外文期刊
作者： Xiao, Yinrun 1 ; Liu, Conglong 1 ; Hu, Na 1 ; Wang, Bowen 1 ; Zheng, Kuanyu 3 ; Zhao, Zhiwei 1 ; Li, Tao 1 ;
作者机构： 1.Yunnan Univ, State Key Lab Conservat & Utilizat Bioresources Yu, Kunming 650091, Peoples R China
2.Yunnan Univ, Sch Life Sci, Kunming 650091, Peoples R China
3.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Res Inst, Kunming 650205, Peoples R China
关键词： Bovista limosa; Physiological responses; Heavy metal tolerance; Phytoremediation; Compartmentalization
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：13.6； 五年影响因子：12.7 ）
ISSN： 0304-3894
年卷期： 2023 年 448 卷
页码：
收录情况： SCI
摘要： Reclamation using fast-growing trees has great potential for agroforestry development on former non-ferrous metal mining areas. However, the functional traits of ectomycorrhizal fungi (ECMF) and the relationship be-tween ECMF and reclaimed trees remain unknown. Here, the restoration of ECMF and their functions in reclaimed poplar (Populus yunnanensis) growing in a derelict metal mine tailings pond were investigated. We identified ECMF belonging to 15 genera in 8 families, suggesting the occurrence of spontaneous diversification as poplar reclamation progressed. We described a previously unknown ectomycorrhizal relationship between poplar roots and Bovista limosa. Our results showed that B. limosa PY5 alleviated the phytotoxicity of Cd and enhanced poplar heavy metal tolerance, resulting in increased plant growth due to reduced Cd accumulation in host tissues. As part of the improved metal tolerance mechanism, PY5 colonization activated antioxidant systems, enhanced the conversion of Cd into inactive chemical forms, and promoted the compartmentalization of Cd into host cell walls. These results suggest that introducing adaptative ECMF may be an alternative to bioaugmenting reforestation and phytomanagement programs of fast-growing native trees in the barren metal mining and smelting areas.
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