REACTION OF LEMNA MINOR LINNE TO THE ACTION OF OIL-CONTAMINATED LAKE SOILS

Aksenova Marina Vladislavovna

The article presents the results of a study of the toxicity of bottom sediments (BS) of 4 nameless lakes located on the territory of the Yuzhno-Agansky licensed area in the Nizhnevartovsky district of the Tyumen region in relation to the lesser duckweed Lemna minor Linne. It was shown that 2 years after the total withdrawal (purification) of BS from lakes No. 1, 2, 3 (the content of oil products from 49-380 g/kg to 7.9-15.4 g/kg), they did not have a lethal effect on duckweed , as well as the BS of the control lake No. 4, where cleaning was not carried out (content of oil products 7.8-14.5 g/kg). At the same time, BS of all lakes had a chronic toxic effect on the growth of duckweed fronds and roots in a number of generations. Experimental studies have shown that duckweed, being highly resistant to oil pollution, can serve as an active primary link in the ecosystem of oil-polluted lakes during their reclamation.

Keywords:lakes №№ 1, 2, 3; cleaning; bottom sediments (BS); duckweed (Lemna minor); bioassay toxicity