Thallium

Hyperaccumulation threshold: 100 µg g⁻¹ [ref] Tracked

Thallium is exceptionally toxic, and a handful of Brassicaceae — notably Biscutella laevigata and Iberis intermedia on mineralised soils — hyperaccumulate it. The group is small but significant for the phytoextraction of one of the most toxic heavy metals.

7 species recorded in this database; highest cited value 80,000 µg g⁻¹.

		Metal			Region	Uptake	Verify
Biscutella laevigata	Brassicaceae	Tl Thallium	15,200	152×	Europe (Alps and mineralised districts)	Obligate	review
Brassica oleracea	Brassicaceae	Tl Thallium	6,280	62.8×	Cultivated (experimental)	Facultative	primary
Iberis intermedia	Brassicaceae	Tl Thallium	4,000	40×	Southern France	Facultative	review
Silene latifolia	Caryophyllaceae	Tl Thallium	80,000	800×	Italy, North Macedonia (Allchar)	Facultative	review
Viola allchariensis	Violaceae	Tl Thallium	7,060	70.6×	North Macedonia (Allchar)	Facultative	review
Viola arsenica	Violaceae	Tl Thallium	23,900	239×	North Macedonia (Allchar)	Facultative	review
Viola tricolor subsp. macedonica	Violaceae	Tl Thallium	4,650	46.5×	North Macedonia (Allchar)	Facultative	review