3. Results and discussion
The uranium uptake increased during the cultivation in medium
supplemented by 0.5 mM uranyl nitrate. The highest accumulation
was found after 16days. Uraniumwas localizedmainly in young leaves
and apices and an elevated content was found also in older leaves
(Fig. 1A and B). Generally, the transport of uranium into upper parts
was very low and uranium was accumulated mainly in the roots (up
to 16mg U per gram DW). Straczek et al. (2010) also showed higher
uranium accumulation in the roots than in the shoots. They tested
pea, Indian mustard, maize and wheat. Analysis of the root system