Europium and Cerium Accumulation in Wheat and Rye Seedlings
2014
Shtangeeva, Irina
The purposes of this research were (1) to compare level of uptake and accumulation of Eu and Ce by wheat and rye seedlings grown in soil spiked with these metals, (2) to estimate short-term variations of Eu and Ce in soil and in plants and (3) to study effects of Eu and Ce accumulation on concentrations of other macro- and trace elements in the plants. The experiments were performed in a naturally illuminated greenhouse. Instrumental neutron activation analysis was used to determine concentrations of rare earth elements and essential nutrients and trace elements in the plants and soil. The experimental results indicate that addition of Eu and Ce to soil can lead to enhanced uptake of the trace elements by plants. Plants more easily accumulated Eu than Ce. Moreover, for rye, differences between amounts of Ce in the seedlings grown in Ce-spiked soil and in Ce-free soil were statistically insignificant. During the first hours after transfer of seedlings to soil spiked with Eu, concentration of Eu in the roots of both plant species increased significantly. An increase of leaf Eu concentration was also observed, however, these variations were not as marked as those in roots. During the following 10-day growth in the Eu-spiked soil, concentration of Eu in plants constantly increased. The bioaccumulation of Eu resulted in certain decrease of Eu in the rhizosphere soil. However, no variations in soil Ce concentrations were found. The accumulation of Eu and Ce in rye and wheat seedlings did not significantly affect concentrations of essential plant nutrients and other REEs.
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