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.

Azolla mediated alterations in grain yield and quality in Rice.

Rice is one of the most important cereal crops worldwide. To boost its production in a sustainable manner, co-cultivation with Azolla species is often used to supplement its nitrogen (N) demands. However, beyond N nutrition, the physiological and developmental effects of azolla on rice remain unclear.

Induction of hormesis in plants by urban trace metal pollution.

Hormesis is a dose-response phenomenon observed in numerous living organisms, caused by low levels of a large number of stressors, among which metal ions. In cities, metal levels are usually below toxicity limits for most plant species, however, it is of primary importance to understand whether urban metal pollution can threaten plant survival, or, conversely, be beneficial by triggering hormesis. The effects of Cd, Cr and Pb urban concentrations were tested in hydroponics on three annual plants, Cardamine hirsuta L.