Abstract
The impact of oil on soil microorganisms and watercress plants was assessed. Changes in the structure of the microbial community in oil-contaminated soils and morphological and physiological parameters of watercress plants are shown. It was revealed that high concentrations of oil in the soil lead to serious disturbances of the microbial community and inhibition of biochemical processes in plants, which is confirmed by the inhibition of the growth and development of watercress plants. However, low concentrations of petroleum oil, on the contrary, stimulate the growth of watercress plants. It is concluded that the presented experiments are necessary for the purpose of full and versatile testing of the toxicity of petroleum products on various living organisms and analysis of the nature of their responses.
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