Pb

Lead

Hyperaccumulation threshold: 1,000 µg g⁻¹ [ref] Tracked

Lead is strongly retained in roots and poorly translocated to shoots, so validated foliar lead hyperaccumulators are very rare; most historical claims reflect surface contamination rather than true accumulation. This group is tracked with deliberate caution.

5 species recorded in this database; highest cited value 41,000 µg g⁻¹.

Metal Region Uptake Verify
Hirschfeldia incanashortpod mustard Brassicaceae Pb Lead 3,580 3.6× Morocco, Mediterranean Facultative primary
Lepidium bipinnatifidum Brassicaceae Pb Lead 7,240 7.2× Peru (Cajamarca), Andes Facultative primary
Noccaea rotundifoliaround-leaved pennycress Brassicaceae Pb Lead 8,200 8.2× European Alps Facultative hypothesized
Plantago orbignyana Plantaginaceae Pb Lead 8,240 8.2× Peru (Cajamarca) Facultative primary
Sesbania drummondiiDrummond rattlebox Fabaceae Pb Lead 41,000 41× USA (Gulf Coast), Mexico Facultative primary

Lead news & analysis

Research, industry and conservation context for Lead hyperaccumulation and phytoremediation.

Literature

Why lead is the hardest metal to hyperaccumulate

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

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

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)

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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