News & analysis

Each piece is grounded in a cited primary source and works out what the research means for phytoremediation, agromining, and conservation.

Literature

Six chromosome-grade Noccaea caerulescens genomes trace cadmium hyperaccumulation to gene copy number — and finger a magnesium transporter as its possible oldest actor

October 23, 2026 · Kuzmik, Courtin et al. (2026), bioRxiv preprint · Cd

Chromosome-grade genomes of six Noccaea caerulescens accessions show that cadmium hyperaccumulation tracks amplification of a handful of transporter genes — HMA3 reaching seven copies in calamine plants — while metal genes overall are not copy-number outliers and an ancestral magnesium-transporter duplication hints the trait began as ultramafic soil adaptation, not metal defence.

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Literature

One waste residue digests another — steel slag catalysis turns Pteris vittata fronds into phenolic bio-oil while fixing 94.4% of the arsenic in the char

October 22, 2026 · Yu et al. (2026), Bioresource Technology 464:136040 · As

Hydrothermal liquefaction of Chinese brake fern biomass with sulfuric acid plus waste steel slag delivers a 29.85% phenol-rich bio-oil and locks most of the crop's arsenic into crystalline arsenate phases — but the residual 5.6% and the unreported char loading are where the economics actually get decided.

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Literature

Twelve "native" weeds, nine metals, and a bioconcentration factor of 14.91 that cannot be derived from the paper's own tables — what a Gazipur screening study actually shows

October 21, 2026 · Hasan et al. (2026), RSC Advances

A field screening of twelve weeds from Bangladesh's Gazipur industrial belt reports Pb translocation factors up to 8.15 and Zn bioconcentration factors up to 14.91, but every tissue concentration sits far below the canonical hyperaccumulation thresholds — the study's real lessons are about ratio inflation, food safety on "uncontaminated" soils, and the danger of recommending two of the world's hundred worst invasive species as remediation plants.

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Literature

Zinc refuses the sulfide playbook in Ulva compressa — the alga that stores copper as CuS nanoparticles extrudes excess Zn bound to glutathione instead

October 20, 2026 · Morales et al. (2026), International Journal of Molecular Sciences · Zn

The Santiago group that showed Ulva compressa locks copper away as CuS nanoparticles now reports that zinc gets the opposite treatment — not stored as ZnS, not buffered by phytochelatins or metallothioneins, but co-extruded to the medium wrapped in glutathione — and the inference rests on chemistry, not on any direct speciation measurement.

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Literature

The excluders out-armor the hyperaccumulators at Allchar — Knautia caroli-rechingeri runs 405 mg g⁻¹ of a single caffeoylquinic acid while the thallium violets get by on flavonoid glycosides

October 19, 2026 · Cvetanoska et al. (2026), Chemistry & Biodiversity · Tl

A first metabolomic survey of six plants endemic to North Macedonia's Allchar Tl–As–Sb deposit finds that the species excluding metals from their shoots run vastly larger polyphenol arsenals than the shoot hyperaccumulators — and, more awkwardly, that none of the chemistry tracks thallium at all.

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Literature

Twelve populations, one metal, a whole mountain range — XRF screening maps Türkiye's Noccaea aucheri complex at 1.1–1.4% leaf nickel while zinc stays home

October 18, 2026 · Can et al. (2026), Acta Physiologiae Plantarum · Ni

A range-wide XRF survey of the Noccaea aucheri species complex across six Turkish provinces finds every population running leaf Ni far above the 1% dry-mass mark — with Zn at ordinary background levels — turning a taxonomic field trip into both an agromining prospecting map and, unintentionally, a conservation dossier for ultramafic endemics.

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Database

Ten algorithms, 295 literature records, and a test R² of 0.60 — what machine learning can and cannot tell you about sunflower metal uptake

October 17, 2026 · Qi et al. (2026), Ecotoxicology and Environmental Safety

A ten-algorithm machine-learning model trained on every usable sunflower phytoremediation record explains only about 60% of bioconcentration-factor variance — and systematically underestimates the extreme accumulators that matter most — because genotype, rhizosphere and climate leave no trace in the literature's tables.

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Industry

A bioaccumulation factor of 19 built on a 0.22-ppm denominator — what a gold-phytomining field trial at Tujuh Bukit actually shows

October 16, 2026 · Aminatun et al. (2026), Journal of Water and Land Development

An on-site gold-phytomining trial in Java reports a shoot BCF of 19.11 for Pteris vittata, but the number divides shoot gold by post-treatment ore gold on a nuggety, near-baseline substrate — the control shoots held nearly the same gold concentration, and the fern's real, demonstrated harvest at this site was arsenic, not gold.

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Literature

Primed to remember: treating Silene sendtneri seeds with a growth-promoting bacterium pre-writes its cadmium defenses — and the bacterium may not even need to stay

October 15, 2026 · Subašić et al. (2026), Plants (MDPI) · Cd

Biopriming Silene sendtneri seeds with Paraburkholderia phytofirmans PsJN imprints a defense transcriptome before any cadmium is present, letting seedlings survive doses that kill untreated plants and accumulate 8.5× more Cd — while the bacterium itself apparently does not persist, which changes the deployment math for inoculant-assisted phytoextraction.

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Literature

To mine copper out of a vineyard, harvest the whole plant — chicory wins by its roots, and still recovers only a tenth of the fungicide copper

October 14, 2026 · Lapie et al. (2026), Journal of the Science of Food and Agriculture · Cu

Field trials in three Loire vineyards show whole-crop-harvested chicory removes twice as much soil copper as any crop tested — by exploiting the root, the compartment phytoextraction usually discards — yet even the best treatment clawed back only ~10% of the copper that fungicides keep adding.

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Literature

Molybdenum does not wall cadmium out of clove basil — it re-routes the ion traffic, and that is both the opportunity and the problem

October 13, 2026 · Xiao et al. (2026), Ecotoxicology and Environmental Safety 325:120892 · Cd

Ion-flux and multi-omics evidence shows Mo fights Cd in clove basil by re-programming where cadmium flows — throttling root uptake, recycling glutathione, and pushing the surviving Cd toward leaf vacuoles — a strategy that makes aromatic-crop phytomanagement safer precisely by extracting *less* metal per plant.

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Conservation

Climate models project a northwestward march, not a retreat, for the rare-earth-hyperaccumulating fern Blechnopsis orientalis

October 11, 2026 · Ren et al. (2026), Environmental and Sustainability Indicators · REE

The first climate-niche projection for the REE hyperaccumulator Blechnopsis orientalis finds its suitable habitat expanding, not contracting, under every emissions scenario — but because the authors tie that niche to a transpiration-dependent hyperaccumulation mechanism, newly suitable climate is not the same as newly minable ground.

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Literature

Match the microbe to the metal — in an eight-week Camelina trial, Trichoderma halved DTPA-extractable Ni while Bacillus took the Pb crown

October 10, 2026 · Shahriari et al. (2026), Scientific Reports · Ni

Inoculating Camelina sativa with Trichoderma harzianum cut plant-available Ni by roughly half in multi-metal soil, but the fungus and Bacillus subtilis each won different metals — so a one-microbe-fits-all inoculant strategy fails under mixed contamination.

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Literature

Mercury goes to the wood, not the mycorrhiza — Acacia mangium stems hit 445 mg/kg Hg in a four-tree screening, while the AMF boost the phytoremediation literature promises never shows up

October 8, 2026 · Sommer et al. (2026), Environmental Science and Pollution Research

In a greenhouse screening of four legume trees for mercury cleanup in Ghana's gold-mining landscapes, Acacia mangium concentrated Hg to 445 mg/kg in its stems while staying physiologically unharmed — but arbuscular mycorrhizal inoculation, the standard uptake-enhancing add-on, produced no significant effect on Hg accumulation in any species.

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Literature

A selenium hyperaccumulator barely disturbs its own root microbiome — its non-accumulating cousin loses both diversity and its nitrogen-fixing symbiont

October 7, 2026 · Dotson, Kurowski & Grillo (2026), Plant Biology · Se

In a greenhouse 16S study of two Astragalus congeners, selenate dosing left the Se hyperaccumulator's root microbiome essentially unmoved while the non-accumulator's root community was restructured and its dominant rhizobium suppressed — evidence that what protects the microbiome is the chemical form a plant stores its selenium in, not how much it holds.

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Literature

Five years, three sites, 31 woody species: the best cadmium and zinc accumulator of the trial never crossed the hyperaccumulation line

October 6, 2026 · Pfendler et al. (2026), Ecotoxicology and Environmental Safety 324:120820 · Cd

In the largest multi-site woody phytomanagement trial yet reported, the cultivar that pulled the most Cd and Zn into its leaves and bark still fell short of hyperaccumulation thresholds — evidence that for trees and shrubs on contaminated land, annual metal offtake is a biomass game, and site choice beats species choice.

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Literature

The biggest selenium pool in Cardamine hupingshanensis hides from standard extraction

October 3, 2026 · Duan et al. (2026), Food Chemistry: X · Se

The main soluble selenium compound in the Cardamine hupingshanensis shoot — selenolanthionine, ~47% of tissue selenium — was nearly invisible to the standard protease-and-anion-exchange workflow, so a decade of speciation profiles for this commercialized hyperaccumulator may describe the extraction chemistry more than the plant.

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Literature

In a Pb-contaminated landfill rhizosphere, the mycorrhizal community that multiplies fastest helps Calotropis least — and phosphate-solubilizing bacteria raise lead uptake while locking it in the roots

October 1, 2026 · Ariyanti, Cahyani & Cahyono (2026), Journal of Degraded and Mining Lands Management · Pb

A greenhouse trial using rhizosphere soils of three landfill phytoremediators shows that arbuscular mycorrhizal inoculants selected for spore multiplication can be the least effective at promoting plant growth and Pb uptake, while phosphate-solubilizing bacteria enhance Pb uptake but redirect it root-ward — making Calotropis gigantea cuttings a phytostabilizer, not a phytoextractor.

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Literature

Potentilla chinensis pushes zinc into its shoots at a 7.24 translocation factor while photosynthesis holds — a phytoextraction candidate, honestly not yet a hyperaccumulator

September 30, 2026 · Wang et al. (2026), Life 16(9):1562 · Zn

A pot trial on an Inner Mongolian Potentilla chinensis reached 1,354 mg Zn kg⁻¹ in shoots with shoot-to-root ratios above 1 at every dose — but the authors themselves note this sits below even the revised 3,000 mg kg⁻¹ Zn hyperaccumulation threshold, so the real news is the translocation-plus-tolerance physiology and a congener that already is a Zn hyperaccumulator, not a new record.

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Literature

A remediated site keeps a metal-adaptive memory — Leersia hexandra's formerly contaminated ecotype still out-accumulates a clean-site ecotype up to 23.5-fold in leaves under renewed Cu+Ni exposure

September 29, 2026 · Chen et al. (2026), Ecotoxicology and Environmental Safety · Cu

Two ecotypes of the grass Leersia hexandra — one from a historically contaminated, now remediated site, one from clean cropland — were re-exposed to combined copper and nickel in hydroponics, and the remediated-site plants still accumulated up to 17.6-fold more Cu in stems and 23.5-fold more in leaves, suggesting metal-adaptive traits can persist after the contaminating pressure that selected them is gone.

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Literature

Tea has been loading aluminium as a fluoride complex all along — two aquaporin-family transporters, CsNIP2 in roots and CsNIP16 in xylem, move the Al–F pair, and a MYB brake stops the flow from overshooting

September 28, 2026 · Zhou et al. (2026), Plant Physiology and Biochemistry 239:111746

Tea is a textbook aluminium accumulator, yet nobody knew how the metal crosses root and stem membranes — Zhou et al. show two NIP aquaporins traffic aluminium–fluoride complexes with a tissue-by-tissue division of labour, gated by a stress-induced repressor and activator pair, which turns out to be a design template for tuning metal uptake rather than just a tea story.

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Literature

A liverwort parks its metals in the basement: Marchantia polymorpha survives smelter soil by ventral sequestration, but its cadmium uptake saturates far below the hyperaccumulation threshold

September 27, 2026 · Cimerman et al. (2026), Plant and Soil · Cd

A soil-gradient experiment in the model liverwort shows Cd uptake saturating around 53 mg kg⁻¹ — barely half the vascular hyperaccumulation threshold — while Zn and Pb track the soil linearly, which makes the species a useful sentinel for two metals and a systematically misleading one for cadmium.

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Literature

Silicon nanoparticles find the cadmium while jasmonic acid absorbs the damage — split duties lift Sedum alfredii removal 67.4% on barely 5–6% more bioavailable Cd

September 26, 2026 · Yang et al. (2026), Journal of Hazardous Materials · Cd

A combined silicon-nanoparticle and jasmonic-acid treatment raised total cadmium accumulation in Sedum alfredii by 67.4% while increasing rhizosphere bioavailable Cd by only ~5–6%, because the two amendments play asymmetric roles — one runs metal flux, the other pays the detox bill — an "accumulation-compatible tolerance" recipe that sidesteps the leaching problem that sank chelator-assisted phytoextraction.

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Literature

Where the thallium hides — synchrotron microtomography shows Biscutella laevigata detoxifying in leaf epidermal vacuoles, and a pot-to-field gap stalks the economics

September 25, 2026 · van der Ent et al. (2026), Annals of Botany · Tl

Synchrotron X-ray fluorescence microtomography shows Europe's classic Tl hyperaccumulator sequestering the metal in the vacuoles of leaf epidermal cells and at trichome bases — but the same lab's 2024 companion study found the opposite pattern in roots, and field plants run an order of magnitude below the species' famous 1.94% pot record.

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Literature

The lowest dose of potassium iodide gave the biggest vanadium response — a Bulgarian screening study shows halide-assisted phytoextraction is element-specific, dose-inverted, and easy to misread

September 24, 2026 · Petrov et al. (2026), Processes 14(18):2910

On a real post-mining substrate, potassium iodide raised vanadium bioconcentration in chicory roots 57-fold at the lowest dose tested — while raising the dose did nothing of the kind for any element, and most of the apparent gains in translocation factors turned out to be root losses in disguise.

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Literature

A hyperaccumulator and a crop need opposite chemistry to give up their selenium — standard enzymatic extraction quietly destroys selenolanthionine in Cardamine hupingshanensis

September 23, 2026 · Duan et al. (2026), Food Chemistry: X 39:104410 · Se

In the selenium hyperaccumulator Cardamine hupingshanensis, Se is stored as water-soluble free selenoamino acids that a standard one-step protease digestion largely destroys — recovering only 5.06 µg Se g⁻¹ of selenolanthionine where a water-first two-step protocol finds 143.74 — so published speciation profiles of hyperaccumulators made with the conventional method may be systematically missing the compounds that define these plants.

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Literature

EDTA and DTPA concentrate metals in castor yet shrink the crop so much that total removal falls — a gold-mine soil trial makes the case for citric acid plus foliar auxin instead

September 22, 2026 · Quronfulah et al. (2026), Journal of the Saudi Society of Agricultural Sciences · Cd

On soil from the Mahd Ad'Dahb gold mine, the synthetic chelators EDTA and DTPA raised castor's bioconcentration factors but cut root and shoot growth enough that total metal uptake dropped, while a biodegradable weak acid plus a foliar auxin spray (citric acid + IAA) nearly tripled per-plant cadmium removal — a clean demonstration that assisted phytoextraction can optimize the wrong variable.

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Literature

Kale crystallizes thallium chloride on its leaf veins — a halophyte-style detox trick that makes the crop both a poison and a potential ore

September 21, 2026 · Corzo-Remigio et al. (2026), Metallomics · Tl

Synchrotron microdiffraction on living kale leaves shows the plant sequestering leaf thallium as ~5 µm cubic TlCl crystals near its hydathodes — a salt-excretion strategy borrowed from halophytes that simultaneously explains kale's food-safety hazard and hints at an unexpectedly simple metallurgy for thallium phytomining.

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Literature

The Ni hyperaccumulator's rhizosphere runs on its boring microbes — in Odontarrhena chalcidica, genome-scale modelling predicts that abundant "potentiator" taxa, not network keystones, carry the broader function and feed the keystones

September 20, 2026 · Jiang et al. (2026), Journal of Hazardous Materials · Ni

A Sun Yat-sen/INRAE team sequencing the Odontarrhena chalcidica rhizosphere found that keystone taxa and abundant stable "potentiator" taxa are taxonomically distinct — and metabolic modelling predicts cross-feeding support flows mainly from the potentiators to the keystones, inverting who does the heavy lifting in a designed inoculum.

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Literature

The mercury strategy of the arsenic hyperaccumulator is chemical lock-up, not vacuolar pumping — Pteris vittata stores Hg as β-HgS and glutathione complexes, and its 83 mg/kg shoots leave the hyperaccumulator label deliberately unproven

September 19, 2026 · Wan et al. (2026), Journal of Hazardous Materials · As

In abandoned mercury mines, the famous arsenic fern Pteris vittata concentrates Hg to 83 mg/kg in shoots — but XANES shows the metal is locked away as solid β-HgS and glutathione complexes, a detox chemistry that stabilizes mercury in roots rather than moving it into harvestable fronds.

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Database

Türkiye's nickel-hyperaccumulator map is mostly an evidence-quality map — a source audit of 66 published records finds only 12 can be pinned to source-supported coordinates, and 51 cannot be located more precisely than a region

September 18, 2026 · Ünver (2026), Anatolian Journal of Botany · Ni

A source-by-source audit of every published nickel-hyperaccumulator and accumulator claim for Türkiye finds that 51 of 66 evidence entries carry only regional-or-worse locality precision, that 87.5% of the country's GBIF records lack usable coordinates, and that the mappable residue — 12 localities — traces mostly to two field studies, which means the apparent geography of Anatolian nickel hyperaccumulation is an artefact of where botanists have already looked.

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Industry

Nickel agromining has a physics problem, not just a hype problem — the topsoil's labile nickel pool caps real yields near 500 kg per hectare, and the field record is a quarter of that

September 17, 2026 · van der Ent et al. (2026), Environmental Science & Technology · Ni

The field's founding scientists calculate that no natural ultramafic topsoil can supply more than ~500 kg Ni ha⁻¹ yr⁻¹ to any crop — and that the best whole-crop field demonstration ever, an improved Odontarrhena chalcidica cultivar in Oregon, reached 400 kg, while commercial European fields sit near 105 kg — which makes the industry's credibility, not its agronomy, the real bottleneck.

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Literature

Same playbook, 20 million years apart: non-hyperaccumulating Alyssum solves serpentine soil with the same ion-transport genes as Arabidopsis

September 16, 2026 · Celestini et al. (2026), Annals of Botany · Ni

A reciprocal-transplant plus genome-scan study in Alyssum gmelinii and A. spruneri shows that serpentine adaptation means early germination, aggressive calcium foraging and active nickel/cobalt exclusion — not hyperaccumulation — and that 13 of the selected genes are the same ones Arabidopsis arenosa uses, implying the reusable parts of the serpentine toolkit are transporters, not the hyperaccumulation syndrome.

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Literature

Cardamine's "missing" selenolanthionine was being destroyed at the bench — extraction choice swings the measured pool 28-fold

September 15, 2026 · Duan et al. (2026), Food Chemistry: X · Se

An orthogonal LC-AFS study shows the standard one-step enzymatic extraction silently destroys the free selenoamino acids that make Cardamine hupingshanensis a selenium hyperaccumulator — measured SeLan rose 28-fold when water extraction preceded enzymolysis — which means part of the published Se-speciation literature may be describing the extraction bottle, not the plant.

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Literature

Pokeweed sorts the lanthanides by size — heavy rare earths slip out of the leaf veins and into vacuoles

September 14, 2026 · Liu et al. (2026), Industrial Crops and Products · REE

Spatially resolved LA-ICP-TOF-MS mapping and subcellular fractionation show that Phytolacca americana partitions heavy rare earths away from leaf-vein walls and into mesophyll vacuoles (vacuolar share 5.5% → 14.5% across the series) — the first mechanistic picture of HREE-selective hyperaccumulation, and a reminder that the plant's value lies as much in *which* lanthanides it loads as in how many.

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Literature

A hyperaccumulator's roots hunt cadmium in water — and lose the scent in soil

September 13, 2026 · Hu et al. (2026), Bioresource Technology · Cd

Split-root experiments in Sedum alfredii show the hyperaccumulating ecotype sends over 60% of its root biomass toward a Cd-enriched patch in hydroponics — but the response disappears in soil, which both explains years of contradictory lab results and relocates the phytoextraction lever from plant breeding to soil management.

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Literature

One tree species holds 99% of a Borneo ultramafic forest's nickel budget — and keeps it in its stems, not its leaves

September 12, 2026 · Nkrumah et al. (2026), Ecological Research · Ni

A destructive whole-stand harvest in Sabah shows Rinorea cf. bengalensis — 83% of the biomass — carries ~99% of the plot's nickel, mostly aboveground in woody stems, making the hyperaccumulator the stand's biogeochemical pump and putting a hard, uncosted number on what agromining such a forest could yield.

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Conservation

The Odontarrhena that says no — the Pirin endemic O. orbelica excludes nickel, and that sharpens where the hyperaccumulation trait comes from

September 11, 2026 · Pavlova et al. (2026), Ecological Research · Ni

A comparative field–pot–hydroponic study of three Odontarrhena species finds that the non-serpentine Pirin endemic O. orbelica is a nickel excluder while its serpentine relatives hyperaccumulate — evidence that hyperaccumulation is edaphically coupled, not genus-wide.

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New species

A fern and a bearded iris push strontium into their shoots — the export trait is real and rare, but the "hyperaccumulator" label outruns a one-tank hydroponic screen

September 10, 2026 · Patriciu et al. (2026), Scientific Reports

A two-week hydroponic screen finds the Boston fern and Iris × germanica moving strontium to harvestable shoots (TF 1.2–2.2, total-plant Sr up to 4,334 mg kg⁻¹) — the rare trait for Sr, but every replication and soil-relevance caveat sits on the record too.

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Literature

Timed drainage turns rice into a cadmium pump — managed drying lifted DGT-labile Cd 7.94-fold and cut paddy soil Cd by 37.5% in a single season

September 8, 2026 · Yin et al. (2026), Plant and Soil · Cd

A Hunan field trial inverts the standard paddy rule — instead of flooding to keep cadmium out of grain, deliberately timed drying oxidises CdS, acidifies the rhizosphere and lets a high-Cd rice cultivar pull 474.56 g Cd ha⁻¹ out of the soil in one season, at removal efficiency comparable to dedicated hyperaccumulators.

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Literature

A ⁶¹Ni tracer baked into synthetic saponite exposes a quiet uptake channel in Odontarrhena chalcidica — a fifth of shoot Ni came from the amendment on a low-Ni ultramafic soil, and every bulk measurement said nothing happened

September 7, 2026 · Trimmel et al. (2026), Analytical and Bioanalytical Chemistry · Ni

Stable-isotope tracing shows Odontarrhena chalcidica quietly mined a ⁶¹Ni-labelled saponite amendment for 19.3 ± 5.0% of its shoot Ni on a low-Ni ultramafic soil (7.7 ± 1.8% on a high-Ni one) — uptake that total-Ni budgets and DGT both registered as zero.

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Literature

Manganese detoxification has a map inside a Celosia leaf — the tip takes the hit, protein binding takes the metal, and the stomata throttle the whole system

September 6, 2026 · Zhang et al. (2026), BMC Plant Biology · Mn

A hydroponic dose series in the manganese accumulator Celosia argentea shows uptake efficiency is humped — bioconcentration peaks at 365× at 50 mg/L and falls to 234× by 150 mg/L — and that within each leaf the transpiration terminus at the tip is where the damage, and the protein-based detox chemistry, both concentrate.

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Industry

Shade is a metal-removal budget — a Sicilian agrivoltaic-phytoremediation study prices the metal-rich ash only as a liability

September 5, 2026 · Di Agosto et al. (2026), Environmental Science and Pollution Research · Ni

A simulation study pairing hemp, vetiver and giant reed with photovoltaic panels over Sicily's Augusta petrochemical site finds contamination and panel shade each strip 15–50% of biomass — and models the gasification ash, where the metals concentrate, strictly as a €100–200-per-tonne disposal cost.

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Database

A 52-element census of 5,474 plant samples shows hyperaccumulators are the tail of the distribution, and what number-only screens miss

September 3, 2026 · Coker et al. (2026), ACS Environmental Au · Ni

The median plant record in a new global elementome holds 1.7 mg kg⁻¹ nickel while the database mean sits at 167 — a ~98× skew that is the hyperaccumulator signal itself, and the same study's threshold screen both recovers New Caledonia's nickel flora and crowns duckweed a "cadmium hyperaccumulator".

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New species

Cardamine hupingshanensis wires selenium stress into ABA and cold signaling through U-box E3 ligases

August 23, 2026 · Wang et al. (2026), BMC Genomics 27:291 · Se

A genome-wide scan of the selenium-tolerant Brassicaceae Cardamine hupingshanensis finds 114 U-box E3 ubiquitin ligases, several strongly induced by selenium and physically linked to ABA receptors and the cold-stress regulator ICE1 — hinting that selenium homeostasis is managed by repurposed stress-signalling hardware.

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Literature

AMF–PSB co-inoculation doubles cadmium phytoextraction in Sedum plumbizincicola through complementary growth and mobilisation pathways

August 22, 2026 · Tian, Yang, Yang, Wu, He & Zhan (2026), BMC Plant Biology · Cd

A pot study shows that co-inoculating the Cd/Zn hyperaccumulator Sedum plumbizincicola with an arbuscular mycorrhizal fungus and a phosphate-solubilising bacterium raises shoot Cd accumulation by 182% by simultaneously increasing biomass and rhizosphere Cd bioavailability.

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Industry

REE phytomining only adds up if the biomass becomes the product, not the concentrate

August 21, 2026 · Huang, Xie, Rylott, van der Ent, Liu, Morel, Baker, Wang, Tang & Qiu (2026), Communications Earth & Environment · REE

A new perspective argues that rare-earth phytomining becomes economically viable only when the harvested biomass is upcycled into fertilizers or catalysts rather than processed into separated rare-earth oxides — turning co-accumulated calcium, silicon and aluminium from impurities into ingredients.

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Literature

A selenium plant's glutathione toolkit explains how it tolerates selenium — not how it hoards it

August 15, 2026 · Xie, Chen, Liu, Gao, Liang, Chen, Xiang, Chen, Hou, Lu, Tang & Zhou (2026), Plant Science · Se

A selenium plant's newly catalogued glutathione-S-transferase toolkit — 61 genes and three selenium-responsive Tau enzymes that shield cells from oxidative damage — is a survival system, not an uptake pump, and that distinction decides whether the trait is any use to selenium agromining.

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Literature

A timber tree clears the manganese hyperaccumulation line — but manganese is the wrong metal to mine

August 14, 2026 · Liaquat, Gulzar, Malik, Rehman, Munis, Kim, Zhang, Du, Shang & Liu (2026), Industrial Crops and Products · Mn

A common subtropical timber tree, Schima superba, banks up to 13,487 µg/g of manganese in its leaves — enough to cross the hyperaccumulation threshold — but the metal is too cheap and the wood too slow-growing for phytomining, which makes this a restoration story, not a mining one.

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Literature

In a maize pot trial, oxalic acid immobilized nickel instead of mobilizing it — cutting shoot uptake by half

August 13, 2026 · AL-Huqail et al. (2026), BMC Plant Biology · Ni

Low-molecular-weight organic acids are the classic chelators for pulling metal up into harvestable shoots; in this early-access pot study high-dose oxalic acid did the reverse — lowering bioavailable soil nickel and cutting maize shoot nickel by 53% while biomass rose 40% — a reminder that the acid, the dose and the intended endpoint decide whether you extract a metal or lock it down.

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Industry

In a Peruvian cacao trial, soil cadmium fell 96% in one season, but the beans barely moved and the plants cannot account for the drop

August 12, 2026 · Alvarado-Alva et al. (2026), Agronomy · Cd

Two weedy accumulators planted between cacao trees are credited with a near-total one-season soil-cadmium crash, but a mass balance shows the plants removed on the order of one percent of what vanished, and cacao-bean cadmium, the number that actually gates the crop out of Europe, hardly changed.

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Literature

In a zinc/cadmium/lead hyperaccumulator's rhizosphere, soil metal selects the detox genes — but the host selects the transporters

August 9, 2026 · Bočaj et al. (2026), Environmental Microbiome · Zn

Metagenomics of Noccaea praecox splits its root microbiome in two — contaminated soil enriches exactly the metal-efflux functions that bioaugmentation already screens for, while the transporter functions that might actually help mobilise metal are set by the plant host and the root compartment, an inversion that complicates the case for off-the-shelf inoculants in phytoextraction.

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Literature

A calamine bird's-foot trefoil tolerates zinc, lead and cadmium by exclusion — but its shoots still cross the cadmium feed limit

August 8, 2026 · Sujkowska-Rybkowska et al. (2026), Antioxidants · Cd

A metallicolous Lotus corniculatus keeps zinc, lead and cadmium out of its shoots by root exclusion and a rerouted redox economy — the exact profile you want for phytostabilisation, and a quiet hazard in a forage legume, because the little cadmium that still gets through exceeds the EU animal-feed limit.

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Literature

Why lead is the hardest metal to hyperaccumulate

August 8, 2026 · van der Ent et al. (2013), Plant and Soil · Pb

Lead shares a 1,000 µg g⁻¹ hyperaccumulation threshold with nickel and arsenic, yet validated foliar lead records are orders of magnitude scarcer — and the reason lies in soil chemistry and root biology, not a lack of searching.

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Literature

A moss at Allchar can assay 25,000 µg g⁻¹ arsenic and still not be accumulating it — most is soil dust

August 7, 2026 · Jakovljević et al. (2026), Planta · As

Bryophytes on the world's richest arsenic–thallium soils assay up to ~2.5% arsenic in their tissue, but crustal-element tracers, electron microscopy and an apolar-solvent wash show most of it is mineral dust stuck to the surface — a warning that hyperaccumulation screened on unwashed near-source tissue is inflated, with genuine uptake modest and strongest for thallium in a single moss.

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Literature

Acid-digesting 234 herbarium sheets maps the metal hoarders of Angola — and they hoard the wrong metals

August 3, 2026 · Morgenstern, Baumgärtel, Lautenschläger, Götzke, Neinhuis & Weigand (2026), Environmental Monitoring and Assessment · Mn

A herbarium screen adds ~28 aluminium accumulators and one manganese hyperaccumulator (Landolphia congolensis, ~20,900 µg g⁻¹) to the flora of Angola — but nothing new for nickel, cobalt or copper, and the arithmetic in the paper shows the metals it found are barely worth harvesting.

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Industry

Nickel phytomining off serpentine: a hyperaccumulator, an urban soil, and a shrinking labile pool

July 29, 2026 · Giunchino, Mucciarelli, Angus, Sordello, Borrelli, Lanfranco & Calza (2026), Journal of Hazardous Materials Advances · Ni

A pot trial runs the whole agromining chain — hyperaccumulate, ash, recover the metal — on nickel-spiked urban soil, and watches the readily mobile nickel drain away as it goes, a reminder that what a pot gives up need not match aged field ground.

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Literature

In a lead-tolerant grass, the detox switch is a root jasmonate–glutathione node — which points at stabilisation, not extraction

July 28, 2026 · Meng et al. (2026), Plants (MDPI) · Pb

A root proteome–metabolome of Pogonatherum crinitum pins its lead tolerance on a jasmonate-driven glutathione detox circuit — but the study measures no tissue lead of its own, and the mechanism it describes is the signature of holding Pb in the roots, not mining it into the shoots.

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Literature

Two Malagasy daisies clear the nickel bar — a Valozoro serpentine survey nominates two Asteraceae as nickel hyperaccumulators

July 27, 2026 · Rasolondraibe, Farasoa & Rabesiaka (2026), Romanian Journal of Ecology & Environmental Chemistry · Ni

A field screen on a Madagascar nickel deposit turns up two Asteraceae above the 1,000 µg g⁻¹ threshold — extending, again, the family that already gives serpentine ecology Senecio coronatus and Berkheya, but on the strength of single samples that make these candidate records, not confirmed ones.

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