Lampis et al. 2015 — Rhizobacterial promotion of arsenic phytoextraction by Pteris vittata

This greenhouse study tested whether inoculation with arsenic-resistant, plant-growth-promoting rhizobacteria improves arsenic phytoextraction by the fern Pteris vittata. It is upstream mechanism and microbiome evidence on arsenic soil-to-plant transfer and bioremediation; it reports no retail food occurrence and is context-only for Heavy Metal Index purposes.

Key numbers

• P. vittata cultivated 4 months in a contaminated substrate of arsenopyrite cinders plus mature compost, under four conditions (no inoculum; bacterial mix A; bacterial mix B; all five strains, AB).
• Growth-promoting rhizobacteria increased plant biomass by up to 45%.
• Arsenic removal efficiency rose from 13% (no bacteria) to 35% with the mixed inoculum.
• Introduced strains persisted in soil and significantly altered the bacterial community structure.

Methods (brief)

Greenhouse pot trial with selected siderophore-producing, arsenate-reducing, IAA-producing rhizobacterial strains (Pseudomonas, Delftia, Bacillus, Variovorax, Pseudoxanthomonas); As removal and biomass measured, strain persistence confirmed by molecular analysis.

Implications

Certification: Contributes nothing to HMT&C threshold pools. Mechanism/microbiome context on arsenic phytoextraction; route as exposure/mechanism context to Soil-to-plant transfer of heavy metals, Arsenic, Total, and Agronomic mitigation.

Courses: Quantifies the microbial-inoculation lever for arsenic phytoextraction (13% → 35% removal).

App: No contamination_profile blocks are touched.

Microbiome: WikiBiome federation signpost — plant-growth-promoting rhizobacteria enhancing metal phytoextraction.

Wiki pages this source may touch

• Arsenic, Total
• Soil-to-plant transfer of heavy metals
• Agronomic mitigation
• Microbiome

Verification notes

• Evidence tier B: primary greenhouse experiment in a peer-reviewed journal (Frontiers in Plant Science, CC BY 4.0).
• Page grounded in the published abstract and bibliographic metadata; values preserved as printed. Full-text extraction can follow on synthesis.
• metals: [tAs] — total arsenic, not speciated.
• ingredients: [] / products: [] correct: bioremediation context, not retail food occurrence.
• Part 2 direction-of-edit check: adds upstream mechanism/microbiome literature; neutral to HMT&C thresholds, moves toward the literature.

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.