copper

Decreasing the Copper Ion Phytotoxicity Using Rhodococcus Biosurfactants

The effect of copper on the germination of seeds of several agricultural plants, namely, common vetch, white mustard and oats in the presence of Rhodoccocus-biosurfactants was studied. As a result of the conducted studies it was established that Avena sativa L. was the most stable plant to the action of copper, and Vicia sativa L. was a less stable plant. By the copper resistance degree, the plants used in the work could be arranged in the series: Avena sativa L. > Sinapis alba L. > Vicia sativa L.

PHYTOPROTECTIVE EFFECT OF AMMONIUM HUMATE AT HIGH COPPER CONCENTRATIONS IN THE ENVIRONMENT

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 cop-per 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.