Bei et al. 2025 - Pteris vittata rhizosphere arsenic remediation

Bei and colleagues examined how rhizosphere microbes, root exudates, and arsenic speciation interact during Pteris vittata phytoremediation across multiple soils and arsenic loads. This is in-scope a2 mitigation evidence with strong a3 pathway value because it reports arsenic-contaminated-soil remediation mechanics, root-exudate recruitment, and arsenic-speciation processes rather than consumer-product occurrence.

Key numbers

The pot experiment aged soils with As(V) at 0, 40, and 200 mg/kg for 1 month before transplanting Pteris vittata.

The authors selected 45 rhizosphere samples (3 soils x 3 treatments x 5 replicates) for 16S and ITS amplicon sequencing, and 27 genomic DNA samples (3 soils x 3 treatments x 3 replicates) for shotgun metagenomics.

Plants were grown for 90 days before harvest. Root exudates were collected by submerging washed roots in 250 mL ultrapure water for 24 h.

The abstract identifies 44 bacterial genera and 10 fungal genera as genetically conserved core microorganisms.

The study reports that high-arsenic stress shifted microbial community assembly from stochastic to deterministic processes while maintaining remediation efficiency through increased fungal network connectivity.

Background soil arsenic from the three field sites was quantified by atomic fluorescence spectrometry, and total arsenic plus arsenic fractionation were then assessed in soils and plant tissues after the pot trial.

Methods (brief)

The study combined soil aging with arsenate, Pteris vittata pot cultivation, rhizosphere sampling, root-exudate metabolomics, total-arsenic and arsenic-speciation analysis, 16S/ITS amplicon sequencing, and shotgun metagenomics across three Chinese soil types. The authors then used co-occurrence and centrality analysis to identify core and keystone taxa linked to arsenic uptake and remediation.

Implications

Certification: Not product-occurrence evidence. The source belongs in arsenic-remediation and soil-to-plant pathway context, not in a consumer-product benchmark pool.

Courses: Useful phytoremediation case for explaining how rhizosphere microbes, arsenic speciation, and root exudates can be manipulated to improve cleanup of contaminated soils.

App: Context only.

Wiki pages this source may touch

• Remediation evidence — drivers and interventions
• Soil-to-plant transfer of heavy metals
• Arsenic, Inorganic
• Arsenic, Total

Verification notes

The corpus queue mislabeled this record as WIKIBIOME-HANDOFF. On deep read it is recoverable HMI a2 evidence because it reports primary arsenic-remediation and rhizosphere-speciation data in contaminated soil. iAs and tAs are both tagged because the paper discusses arsenic speciation transformation and also measures total arsenic in soils and plant tissues.

Page history

The five most recent substantive edits to this page. The full version history lives in git; when DOI minting comes online (see schema docs), each entry below will also link to a version-pinned DataCite DOI.