The Effect of rapper on the ramponents of barley plant ascorbate-glutathione cycle
The effect of different concentrations of copper on components of ascorbate-glutathione cycle in barley was studied in greenhouse experiments on different soil types. It was established that contamination of soddy-podzolic sandy loam soil with copper within APC 1.6-9.2 caused a metal dose-dependent accumulation of ascorbic acid and glutathione in barley leaves. On heavy loamy leached chernozem at copper levels exceeding 0.9-4.7 APC plants showed a reduction in the pool of glutathione with a significant increase in the content of ascorbic acid and glutathione at the maximal concentration of the metal (11.5 APC). The observed regularities attest to the differences of oxidation-reduction reactions in plants, depending on the concentrations of the metal.