Session 3 Progress in phytoextraction of inorganic contaminants: critical factors for success in the field Chair: Maria Greger (SE) and Bernd Markert (DE) Session 3............................................................................................................................................................ 1 Metal hyperaccumulator plants: biological resources for exploitation in the phytoextraction of metal-contaminated soils ................................ 3 Efficient heavy-metal-accumulating tobacco variants obtained from in vitro breeding and selection: results, conclusions and future prospects ......................................................................................................................... 5 Plant genes for hyperaccumulation and hypertolerance: prospects for genetic engineering in phytoremediation ................................................. 8 Genetic engineering of microbial amendments for increased immobilization of metals in soil: monitoring effects on plant growth ......................................................................................................................................... 10 Phytostabilization as a working technology .................................................................... 12 Metal immobilization by constructed wetlands: regulating factors, limitations and future prospects.......................................................................... 14 Session 3 (Posters)........................................................................................................................................... 16 Risk assessment for metals with the help of 'mobile' and total metal concentrations in soils as regulated by the Swiss Ordinance relating to impacts on the soil .............................................................................................. 16 Cadmium uptake by Salix viminalis as affected by root CEC and dependence of root CEC on soil characteristics............................................................. 19 Lead uptake by native mediterranean plants grown on the metalliferous soils of Lavrio-Attica, Greece .................................................................... 20 Important physiological factors for optimizing phytoremediation .......................... 21 Toxic metals uptake and physiological responses of trees and some medicinal plants ............................................................................................................ 22 Plant biotechnology applied to environmental monitoring: the case of toxic metals .................................................................................................................. 24 An inventory of trace elements in agricultural ecosystems: the INCO European project FERTILIA ................................................................................. 26 Accumulation of zinc and lead in Phragmites australis and Typha domingensis ............................................................................................................................... 28 Polyamine treatment and lead accumulation and translocation in maize seedlings: interesting perspectives for phytoremediation strategies .................................................................................................................................... 29 Phytoremediation of toxic metals and radionuclides at the laboratory scale ........................................................................................................................ 31 A study of accumulation of heavy metals by in vitro culture of plants ........................................................................................................................................... 33