Insights into uptake, accumulation, and subcellular distribution of selenium among eight wheat (Triticum aestivum L.) cultivars supplied with selenite and selenate.

Selenium (Se)-enriched wheat can be improved by altering Se sources and selecting wheat cultivars. Such improvement can affect subcellular distribution and speciation of Se in wheat. Thus, a pot experiment was conducted to investigate Se uptake and distribution when Se was applied as selenite or selenate at low and high rates (1 and 10 mg kg, respectively).

[Transformation and influences of copper and selenium fractions on heavy metals bioavailability in co-contaminated soil].

Pot experiments and laboratory analysis methods were used to investigate the form transformation of additional copper and selenium and their bioavailability for pakchoi (Brassica chinensis) in co-contaminated soil. The results showed that Cu mainly existed in residual bound form, while selenium was present mainly in organic bound and residual form in the uncontaminated soil. In the contaminated soil, copper was mainly bounded to hydrated oxides of iron and manganese, while Se was in exchangeable and carbonate forms.