4. Conclusion
The uranium uptake in plants was found to depend mainly on the
presence or absence of phosphate in the cultivation medium. Uranium
transport to upper, harvestable parts was very limited. Uranium was
stored mainly in apices and young leaves. The uranium transport to
the leaves increased in the presence of tartaric acid. On the other
hand, spraying with polyamine solution (as potential stress protective
compounds) on the leaves resulted in reduction of the uranium
accumulation in the leaves. It can be concluded that the lack or
abundance of phosphate fertilization and different pH values should
be considered as a limiting factor in phytoremediation strategies for
soils and waters contaminated by uranium.