Stage-Associated Plant-Soil-Microbiome Patterns and Rhizosphere Pb-Zn Stabilization in Indocalamus decorus at a Mining Site.
- 1College of Landscape Architecture, Sichuan Agricultural University, Chengdu 611130, China.
- 2Chengdu Botanical Garden, Chengdu 610083, China.
Abstract
Indocalamus decorus is a perennial bamboo with potential for phytomanagement, but its Pb-Zn partitioning and associated microbiome under field co-contamination remain unclear. Parallel plantings were established at a Pb-Zn mining site and the provenance site. Plant nutrients, rhizosphere properties, Pb-Zn concentrations and soil fractions, and bacterial and fungal communities were evaluated across four developmental stages at the mining site; shoot initiation was also evaluated at the provenance site. At shoot initiation, mine-site plants had lower organ P concentrations, whereas root N was maintained. Rhizosphere nutrient availability was relatively high during shooting. Pb accumulated mainly in roots, while Zn was transferred more readily to culms; organ-specific bioconcentration factors for both metals remained below 1. Compared with bulk soil, rhizosphere soil contained lower DTPA-extractable Pb and Zn, smaller acid-soluble/exchangeable fractions, and larger residual fractions. Sample compartment explained 60.8% and 66.9% of bacterial and fungal community variation, respectively. Rhizosphere fungi were associated with a broader range of metal fractions and plant metal-distribution indices than other microbial compartments. These results indicate root-dominated Pb retention, reduced rhizosphere Pb-Zn lability, and compartment-specific microbial associations, supporting further evaluation of I. decorus as a candidate for phytostabilization-oriented management of Pb-Zn-contaminated mine soils.
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BibTeX
@article{miao2026stageassociated,
title = {{Stage-Associated Plant-Soil-Microbiome Patterns and Rhizosphere Pb-Zn Stabilization in Indocalamus decorus at a Mining Site.}},
author = {Zhen Miao and Fulin Yuan and Qiyuan Zou and Chenyanan Yuan and Yi Zheng and Kexin Wang and Bingyang Lyu and Zhenghua Luo and Mingyan Jiang},
journal = {Toxics},
year = {2026},
month = oct,
doi = {10.3390/toxics14100897},
url = {https://europepmc.org/article/MED/42931684},
note = {CC BY},
}
RIS
TY - JOUR
TI - Stage-Associated Plant-Soil-Microbiome Patterns and Rhizosphere Pb-Zn Stabilization in Indocalamus decorus at a Mining Site.
AU - Zhen Miao
AU - Fulin Yuan
AU - Qiyuan Zou
AU - Chenyanan Yuan
AU - Yi Zheng
AU - Kexin Wang
AU - Bingyang Lyu
AU - Zhenghua Luo
AU - Mingyan Jiang
PY - 2026
DA - 2026/10/10
JO - Toxics
DO - 10.3390/toxics14100897
UR - https://europepmc.org/article/MED/42931684
AB - Indocalamus decorus is a perennial bamboo with potential for phytomanagement, but its Pb-Zn partitioning and associated microbiome under field co-contamination remain unclear. Parallel plantings were established at a Pb-Zn mining site and the provenance site. Plant nutrients, rhizosphere properties, Pb-Zn concentrations and soil fractions, and bacterial and fungal communities were evaluated across four developmental stages at the mining site; shoot initiation was also evaluated at the provenance site. At shoot initiation, mine-site plants had lower organ P concentrations, whereas root N was maintained. Rhizosphere nutrient availability was relatively high during shooting. Pb accumulated mainly in roots, while Zn was transferred more readily to culms; organ-specific bioconcentration factors for both metals remained below 1. Compared with bulk soil, rhizosphere soil contained lower DTPA-extractable Pb and Zn, smaller acid-soluble/exchangeable fractions, and larger residual fractions. Sample compartment explained 60.8% and 66.9% of bacterial and fungal community variation, respectively. Rhizosphere fungi were associated with a broader range of metal fractions and plant metal-distribution indices than other microbial compartments. These results indicate root-dominated Pb retention, reduced rhizosphere Pb-Zn lability, and compartment-specific microbial associations, supporting further evaluation of I. decorus as a candidate for phytostabilization-oriented management of Pb-Zn-contaminated mine soils.
SN - 2305-6304
ER -