Physiological Effect of Thallium in the Facultative Hyperaccumulator Silene latifolia.

The metallicolous populations of the facultative Tl hyperaccumulator Silene latifolia are extraordinarily tolerant and capable of accumulating up to 80,000 μg Tl g in nature. A growth stimulatory effect of Tl was observed, and this study set out to determine possible mechanisms. Plants from non-metallicolous and metallicolous populations were subjected to hydroponics dosing experiments at 2.