Abstract
The influence of ammonium humate obtained from peat on the wheat plant tolerance to high CuSO4 concentrations (100, 250, 500, and 1000 μM/l) was studied. Seeds were germinated on copper sulphate solution with and without the humate. Then the plants were grown on Hoagland’s solution in an artificial climate chamber. The humate protective action coefficient was estimated in two ways, namely: by dry weight changes and by copper ion content in comparison with the plants grown without humate. A protective role of the humate at 100 and 250 μM was established, due to copper accumulation reduction in the plants. At higher concentrations the humate enhanced the toxic effect of copper.
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