The influence of micronutrients on the capacity of accumulating cell biomass in Bacillus megaterium strain from soil

Abstract

Bacillus megaterium is a microorganism from soil, located mainly in rhizosphere, with capacities of biosolubilization of insoluble micronutrients, which are unavailable for plant nutrition. The biosolubilization of iron, manganese, zinc and cooper compounds, which are insoluble forms for plant nutrition, depended on the amount of microorganisms in soil. At the end of the experiment, the accumulation capacity of cell biomass was tested for Bacillus megaterium strain, which was isolated from forest soil, for decreasing the high degree of soil pollution. The quantity of accumulated biomass by Bacillus megaterium also depended on the level of microorganism adaptation to the presence of these metals in environment. Thus, it was demonstrated that an isolated strain from the metal polluted soil, in comparison with Bacillus megaterium isolated from a forest soil, would accumulate a significant superior biomass quantity.