Influence of chrome citrate nanoparticles on growth and proliferative activity of Allium cepa L. as test-object

Abstract

The biological influence of the different chrome citrate nanoparticles (CCNP) concentrations on growth and proliferative activity of Allium cepa L. as test-object are investigated. It was found that aqua CCNP solutions in the range at concentrations of 0.25–2.50 mg/l do not cause phytotoxic effects: do not change the turgescence, color and shape of the test object bulbs roots; growth activity of its roots is at the level of control, and phytotolerance is high (94.64–98.57 %). CCNP at concentrations of 5 mg/l–7.5 mg/l and above cause phytotoxic effects of high and maximum levels. It is shown that CCNP in the range at concentrations of 0.25–2.50 mg/l do not have a cytotoxic and mitosis modifying effect on the proliferative activity of cells apical meristem of the test object roots: mitotic and phase indices are within normal limits; indices of cytotoxicity are within background values. The Allium-test confirm the possibility of using CCNP in technologies of growing crops in the range of biologically acceptable concentrations (0.01-0.05 mg/l), which do not reveal any manifestations of phyto-, mito- and cytotoxicity.