A low selenium diet increases heavy metal uptake by motor neurons.

Emissions are not monitored at the source, but lichens are monitored for heavy metal uptake.

Key words: wetland plant, heavy metal uptake, cattail, iron plaque, manganese plaque.

Heavy metal uptake can be reduced by sorption and metabolic inactivation at the cell wall and apoplast level.

Different species of aquatic plants have different rates of heavy metal uptake, a consideration for plant selection in a constructed wetland used for water treatment.

Heavy metals A review by Williams et al. (1994) summarized current knowledge on heavy metal uptake and toxicity in saltmarsh plants, including Z. marina.

These mechanisms include reducing heavy metal uptake, promoting heavy metal sequestration and storage within the cell, and heavy metal excretion.

The advantage of using in vitro techniques instead of conventional uptake experiments is discussed and it is concluded that the gill perfusion technique is a useful tool in studies of factors affecting heavy metal uptake in fish.

Heavy Metal Uptake in Australian Plants We are presently studying the effects of geochemistry on the uptake of heavy metals (e.g., Pb, Zn, Cd and Cu) in Australian woody plants.