Research, industry and conservation context for Nickel hyperaccumulation and phytoremediation.
Literature
September 20, 2026 · Jiang et al. (2026), Journal of Hazardous Materials
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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Database
September 18, 2026 · Ünver (2026), Anatolian Journal of Botany
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
September 17, 2026 · van der Ent et al. (2026), Environmental Science & Technology
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
September 16, 2026 · Celestini et al. (2026), Annals of Botany
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
September 12, 2026 · Nkrumah et al. (2026), Ecological Research
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
September 11, 2026 · Pavlova et al. (2026), Ecological Research
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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Literature
September 7, 2026 · Trimmel et al. (2026), Analytical and Bioanalytical Chemistry
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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Industry
September 5, 2026 · Di Agosto et al. (2026), Environmental Science and Pollution Research
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
September 3, 2026 · Coker et al. (2026), ACS Environmental Au
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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Literature
August 30, 2026 · Belloeil et al. (2026), The Plant Cell 38: koaf281
Nickel hyperaccumulation in Noccaea caerulescens is built on constitutively high expression of a handful of metal transporters — and can be erased by loss-of-function mutations in the root iron transporter NcIRT1.
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Literature
August 13, 2026 · AL-Huqail et al. (2026), BMC Plant Biology
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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Literature
August 1, 2026 · Cai et al. (2026), Bioresource Technology
Nickel hyperaccumulation isn't one trick but two spatially separated ones — and the abstract shows why engineering only half of it makes a plant that hoards metal and suffers for it.
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Literature
July 30, 2026 · Ubaldini, Castaño Gañán et al. (2026), Applied Sciences (MDPI)
Three successive sunflower croppings on uranium-mine substrate show metal uptake collapsing after the first cycle while the soil's total metal barely falls — the readily available fraction, not the ore in the ground, is what sets the ceiling.
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Industry
July 29, 2026 · Giunchino, Mucciarelli, Angus, Sordello, Borrelli, Lanfranco & Calza (2026), Journal of Hazardous Materials Advances
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
July 27, 2026 · Rasolondraibe, Farasoa & Rabesiaka (2026), Romanian Journal of Ecology & Environmental Chemistry
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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Industry
July 22, 2026 · Chaney et al. (2007), Journal of Environmental Quality
Farming hyperaccumulators for metal is real, but its economics turn on a few specific plant traits: biomass, foliar grade, and where the nickel sits in the tissue.
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