文献类型：期刊文献

英文题名：Microbial Communities in Tree Root-Compartment Niches Under Cd and Zn Pollution: Structure, Assembly Process and Co-Occurrence Relationship

作者：Xing, Wenli[1] Gai, Xu[1] Ju, Feng[2] Chen, Guangcai[1]

第一作者：Xing, Wenli

机构：[1] Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, 311400, China; [2] Key Laboratory of Coastal Environment and Resources of Zhejiang Province, School of Engineering, Westlake University, Hangzhou, 310030, China

年份：2022

外文期刊名：SSRN

收录：EI(收录号：20220346094)

语种：英文

外文关键词：Bioremediation - Cadmium - Forestry - Microorganisms - Process control - Soil pollution - Soil pollution control - Zinc

摘要：Woody plants have showed great potential in remediating severely contaminated soils by heavy metals (HMs) due to their cost-efficient and ecologically friendly trait. It is believed the root-associated microbiota plays a vital role in phytoremediation for HMs. However, the ecological process controlling the assembly and composition of tree root-associated microbial communities under HMs stress remains poorly understood. Herein, we profiled the bulk soil, rhizosphere and endosphere microbial communities of trees growing in heavily Cd and Zn polluted soil. The microbiota was gradually filtered from bulk soil to the tree roots and was selectively enriched in roots with specific taxa, such as Proteobacteria and Ascomycota . The microbial community assembly along the soil-root continuum was mainly controlled by deterministic processes from bulk soil to the endosphere, with the normalized stochasticity ratio (NST) indices of 67.16-31.05% and 30.37-15.02% for bacteria and fungi, respectively. Plant selection pressure sequentially increased from bulk soil to rhizosphere to endosphere, with the reduced bacterial alpha diversity accompanying the consequently reduced complexity of the co-occurrence network. Together, the findings provide new evidence for horizontal transmission of endophytic microbiome from soil to the host, which can shed light on the future screening and application of microbial-assisted phytoremediation. ? 2022, The Authors. All rights reserved.