**5. Summary**

The problem of trace metals pollution is transformation of the original pollutants into other species as organometallic compounds of mercury, tin, and lead species that are considered frequently more toxic and mobile in the environment than their corresponding parent compound. Although organometallic compounds occurrence in the environment could be natural, most of the time their quantitative presence is associated with anthropogenic sources and activities. Organometallic amounts in detected environmental samples increased once with their degree of alkylation in the case of all three groups studied (tin, lead, and mercury).

Based on the literature data, worldwide observations showed that a clear relation is observed between organometallic compound concentrations in the soils/underground water and the accumulation of this element in plants. In the case of monitored organometallic compounds, the higher amounts were detected in root and bulb vegetables followed by leafy, vegetables, and fruit vegetables. The uptake factor increased once with the degree of alkylation in the case of all groups studied.
