New Keggin Polyoxometalates with Mixed Addenda as Stimulators of Triticale Seedlings Growth and Biomass Production

In this paper, six new Keggin polyoxometalates: K-8[PVMo10O39] and K-x[MPVMo10O39(H2O)] (x = 6 for M = Mn2+, Cu2+, Co2+, Ni2+ and x = 5 for M = Fe3+) were synthesised and their solutions by 0.1 mu M, 1.0 mu M, 10 mu M and 100 mu M concentrations were used to Triticale seeds soaking. All experiments were performed in hermetically germinators, in dim and isolated room, at 22 degrees C and 38% humidity. Germination yields in the fourth and sixth days, the growth of radical and seminal roots, coleoptile and first leaf and biomass production were determined. Germination yields of Triticale seeds were not significantly different between treatment with polyoxometalates solutions and control (distilled water). The growth of seedlings were easy stimulated at increasing of K-8[PVMo10O39]. 16H(2)O concentrations. Heavy metal cations of K-x[MPVMo0O39(H2O)] stimulated the seedlings growth in order: Ni > Fe > Mn > Cu > Co. Concentrations of heavy metals in Triticale seedlings were determined to establish relationship between their bioaccumulation and inhibitory action. The chelating action of K-8[PVMo10O39]'"16H(2)O and the interaction between heavy metals and molybdenum atoms proved to have an important role.