文献类型：期刊文献

英文题名：Plant diversity enhances phytoremediation efficiency of native herb in Sb and As contaminated soils: A process mediated by abundant bacterial subcommunities over rare ones

作者：Gai, Xu[1] Jiang, Yan[1] Lan, Kaimin[1] Xiao, Jiang[1] Xue, Liang[1] Chen, Guangcai[1]

第一作者：盖旭

机构：[1] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, 311400, China

年份：2025

卷号：393

外文期刊名：Journal of Environmental Management

收录：EI(收录号：20253719147482);Scopus(收录号：2-s2.0-105015367690)

语种：英文

外文关键词：Bacteria - Bioaccumulation - Biochemistry - Bioremediation - Efficiency - Forestry - Phytochemistry - Plants (botany) - Random processes - Revegetation - Soil conservation - Soil pollution - Soil pollution control - Soils

摘要：Native plants show great potential for revegetation and remediation at mining sites. It was extensively documented that the co-planting pattern promoted the remediation efficiency of hyperaccumulators, while the effect and underlying mechanism of co-planting on native plants remain poorly understood. Here, the effects of herbaceous monoculture, herbaceous polyculture, shrub-herb polyculture, and tree-shrub-herb polyculture on the phytoremediation potential of the native herb (Artemisia argyi) and its associated rhizosphere bacterial and fungal subcommunities in Sb/As contaminated soils were systematically investigated. The co-planting significantly increased the bioaccumulation factor, translocation factor, and total accumulation of Sb/As in A. argyi. Concurrently, bacterial alpha diversity (total- and sub-communities) showed a cascade response to co-planting. Except for rare bacteria, the diversity of both bacterial and fungal subcommunities was primarily shaped by stochastic processes, such as homogeneous dispersal and undominated processes. Rhizosphere Sb/As concentrations significantly influenced the assembly of abundant taxa but were not significantly associated with that of rare taxa. In the microbial interaction networks, abundant taxa predominantly co-occurred with rare taxa and partially overlapped with keystone taxa. These abundant taxa also exhibited significant correlations with Sb/As accumulation in A. argyi; notably, this relationship remained significant even when soil properties and rhizosphere Sb/As concentrations were included in the structural equation model. Together, our results demonstrate distinct responses of abundant and rare microbial taxa to co-planting patter and their potential linkages to phytoremediation efficiency, while highlighting the significant promotive effects of plant diversity (tree-shrub-herb configuration) on Sb/As accumulation and translocation in the native plant A. argyi. ? 2025 Elsevier Ltd