XVI International Botanical Congess
Lead localization in the moss Funaria hygrometrica Hedw. was investigated on moss growing on waste from lead mines. Lead localization in the placenta zone was analyzed by X-ray SEM and TEM microanalysis. X-ray SEM and TEM microanalysis shows that lead is present in high concentrations in the parenchymatous tissue of vaginula and overall in the placenta and decreases in the hydroids at the base of seta, 2-3 mm above the foot. The data are discussed in relation to the role performed by the placenta in the block of toxic metals and in preventing the sporigenous tissue and spores from damage.