Specific genes protect cress plants from heavy metals

The Polish Olkusz region, which is home to one of the largest lead-zinc ore deposits in the world and a correspondingly large number of mines, holds a sad record: it is home to some of the most contaminated soils in Europe. The average concentrations of cadmium, zinc and lead can be five to ten times higher than the maximum permissible value in Switzerland. Plants grow poorly here because the toxins slow down the biological activity in the soil and hinder important processes in the plant cells.

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