A study of the synthetic surface active substances’ effect on the growth and development of the soil cyanobacterium Nostoc paludosum

Cyanobacteria are active indicators and test-organisms for the presence in the environment pollutants of different chemical nature. For the first time the impact of three different auto shampoo brands Concentrate, Felix and Uni, related to synthetic surface-active substances (surfactants), on the development and physiological state of the soil cyanobacteria of Nostoc Paludosum is investigated. It is shown that a shampoo Uni is the most toxic substance. Its impact on the cells of Nostoc Paludosum is very deadly; in pure culture the cells’ death rate reached 95.8%. Under the influence of this shampoo in the concentration used for car washing a change in such an indicator of cyanobacterial population as its numerical strength was revealed. The power of the shampoo’s repressive effect increases with its concentration and reaches its maximum at 4 calculated doses.