Isolation and Characterization of Agricultural Soil Bacteria with Biotechnological and Biological Control Potential Applications

Abstract

Unsustainable agricultural practices eventually have an impact on soil conditions and microbiological diversity. To regain balance, ecologically sound strategies can be an alternative. In this work, a collection of bacteria was isolated from agricultural soil and characterized to evaluate their capacity for phosphorus and iron biofertilization, exoenzyme production, and biocontrol of several phytopathogenic fungi. Bacterial identification pointed out to a majority of Bacillus spp. along with other several minority genera. Isolates globally displayed a high proportion of the biological activities tested, especially concerning production of hydrolytic enzymes. Inhibition on fungal growth was variable among the soil bacterial isolates by production of diffusible compounds and/or VOCs (volatile organic compounds). Evidence from this work provides promise for the application of soil bacteria to improve agricultural soil management and crop production.

Keywords

• agrosystem
• agrochemical
• biological activity
• sustainability
• biofertilization
• exoenzyme production