Metal-metal interactions in accumulation of V5+, Ni2+, Mo6+, Mn2+ and Cu2+ in under- and above-ground parts of Sinapis alba

Bioaccumulation of five metals (V5+, Ni2+, Mo6+, Mn2+, Cu2+) and their combinations in under- and above-ground parts of Sinapis alba plants grown hydroponically was determined by using AAS analysis. From obtained results it can be concluded that all individual metals, except Cu, were accumulated in above-ground parts in higher amounts than in the roots. Especially high was the accumulation of Mo and Cu as well in roots as in the hypocotyl. In metal-metal combinations, root accumulation of vanadium was inhibited by Ni, Mn and Cu; accumulation of nickel by Cu, molybdenum by V, Mn and Cu and manganese by Cu. None of the tested metals had any inhibitory effect on the accumulation of copper. In the hypocotyl accumulation of vanadium and molybdenum was inhibited by all tested metals; accumulation of nickel was inhibited by Mo, Mn and Cu, and copper by Ni, Mo and Mn. All tested metals enhanced manganese accumulation. (C) 1998 Elsevier Science Ltd.