Study on Selenium Accumulation Characteristics of Solanum nigrum

In order to study the effects of different concentrations of selenium on the selenium accumulation characteristics of Solanum nigrum, we used the pot experiment to study the effects of different selenium concentrations (0, 5, 10, 25, 50, 75, 100 mg/kg) on the biomass and selenium content of S. nigrum. The results showed that all concentrations of selenium inhibited the biomass of S. nigrum and high concentrations of selenium inhibited the growth of S. nigrum more significantly. In addition, the biomass and selenium content of S. nigrum decreased with the increase of selenium concentration. Selenium content in S. nigrum roots, stems and leaves were in the ranges of 1.75-59.83 mg/kg, 0.91-47.83 mg/kg, and 0.38-44.50 mg/kg respectively under the selenium stress. The selenium accumulation of each part of S. nigrum increased first and then decreased with the increase of selenium concentration. In all treatments, when the concentration of selenium was 10 mg/kg, the selenium accumulation of each part of S. nigrum was the highest and the selenium accumulation of S. nigrum in shoots and whole plants reached 7.888 μg/plant and 12.893 μg/plant respectively. In a word, S. nigrum is most suitable for planting at a selenium concentration of 10 mg/kg.