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Microbial-Mediated Differential Regulation of Yttrium Behavior in the Rhizosphere: Blocking Uptake in Lactuca sativa L. While Enhancing Bioavailability in Solanum nigrum L
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Microbial-Mediated Differential Regulation of Yttrium Behavior in the Rhizosphere: Blocking Uptake in Lactuca sativa L. While Enhancing Bioavailability in Solanum nigrum L
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Journal Article
Microbial-Mediated Differential Regulation of Yttrium Behavior in the Rhizosphere: Blocking Uptake in Lactuca sativa L. While Enhancing Bioavailability in Solanum nigrum L
2026
Overview
To address yttrium (Y) contamination from ion adsorption mining, this study developed a combined microbial phytoremediation strategy for dual objectives: ensuring crop safety in
and enhancing Y recovery by
. Two specific microbial consortia were constructed from rare earth tailings isolates: inoculant I (bacterial:
sp.,
sp.,
sp.) applied to
, and inoculant II (fungal:
sp.,
sp.,
sp.) applied to
. Inoculant I increased
biomass by 26% while reducing Y content in roots and rhizosphere soil solution by 47% and 56%, respectively, potentially through down-regulation of amino acid metabolites. Inoculant II increased Y content in the
rhizosphere soil solution by 89%, linked to up-regulation of organic acids and coumarin derivatives. Both consortia reduced plant stress markers and enhanced soil enzyme activities. These findings demonstrate that specialized microbial consortia can differentially regulate Y behavior in the rhizosphere-immobilizing it in a crop for food safety, while enhancing its bioavailability for a hyperaccumulator-offering a targeted strategy for managing rare earth element-contaminated agricultural soils.
Publisher
MDPI AG,Multidisciplinary Digital Publishing Institute (MDPI)
