[Chemiluminescence suppression in roots of Pisum sativum L. by various metal ions]

The effect of rare metal ions on the activity of the peroxidase system in Pisum sativum L. roots was studied by luminol-dependent chemiluminescence. Trivalent ions of scandium, gallium, indium, and lanthanum, to different extents, inhibit the chemiluminescence of damaged P. sativum roots. A decreased generation of superoxide due to the formation of the complex between metal ions and NADP can underlie the inhibited activity of peroxidase system. The possible mechanism of inhibition of the peroxidase system activity by metal ions is discussed.