Impact of a Number of Factors on Physiological and Biochemical Activity of Strains – Components of Azogran, a Complex Bacterial Preparation

Abstract

The use of microbial preparations in plant-growing can be due to the correction of biological processes in agroecosystems and stimulates growth and development of plants. The efficiency of this process is dependent on biotic and abiotic factors, however their influence on introduction microorganisms in phytosphere is insufficiently studied. The article summarizes some results of recent studies, related to the impact of a number of environmental factors on physiological and biochemical activity of nitrogen-fixing bacteria Azotobacter vinelandii IMV B-7076 and phosphate-mobilizing strain Bacillus subtilis IMV B-7023 -components of Azogran, a complex bacterial preparation for plant growing. The dependence of the physiological and biochemical activity of these bacteria, including their antioxidant potential, on biotic and abiotic environmental agents was determined. The impact of a number of factors on chemotaxis, energy metabolism of these bacteria, their synthesis of substances of phenol nature, and other biologically active substances, which may influence the efficiency of using this preparation in plant growing, was studied. Azogran inhibits the spread of phytopathogens and some kinds of phytophages in agroecosystems, is capable of protecting plants from the oxidative stress and enhancing on 16-37 % their crop productivity. K e y w o r d s: Azotobacter vinelandii, Bacillus subtilis, physiological and biochemical activity, a complex bacterial preparation Azogran.