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The influence of Cd 2+ or Cu 2+ on polyamine (Pa) metabolism and ethylene evolution was studied in sunflower and wheat leaf-discs. Both metals increased putrescine (Put) content in wheat leaves 280 and 90%, respectively, but reduced this Pa in sunflower leaves by about 50% of the control values. Spermidine content was diminished in cadmium and copper sunflower treated leaves...
An operation of the ascorbate-glutathione cycle was investigated in leaves of Arabidopsis thaliana treated with excess Cu (0, 5, 25 50 and 100 μM) for 1, 3 and 7 days. After one-day-treatment significant increase of dehydroascorbate reductase (DHAR) activity and decrease of GSH level was found independently on Cu concentration. Activity of monodehydroascorbate reductase (MDHAR) increased but ascorbate...
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