ИСТИНА

Physiological action of humic acids (HAs) was demonstrated on the numerous microorganisms. One of the possible mechanism of action is the capability to bond toxic substances by HAs. Besides to decreasing toxic effects, HAs are able to mitigate positive effects too. For instance, HAs were reported to mitigate a positive influence of culture broth of bacteria on the ciliate Tetrahymena pyriformis. Therefore, HAs can be considered as substances, mitigating both positive and negative impacts on microorganisms in soils. HAs can be adsorbed on fungi and bacteria and perform as active filters which protect cells from various disturbances. HAs adsorbed on the cell surface (aНАs) may be considered as a kind of protecting «clothes», for cells. This effect can be analogized by the effect of granulated seed. An important advantage of aHAs in comparison to free HAs (НАs in solution), is the absence of the effect of decreasing physiological activity of HAs in soils, due to sorption on the soil surface and point stimulation on the curtain strains. The research demonstrates the ability of aHAs , to increase stability to environmental factors: chemical (active substances clothianidin), physical (UV, drying with subsequent storage in 2,10 and 25 º) and biological (bacteriophages), which have been never shown before.