Although it may appear to be revolutionary, the concept of using plant growth-promoting rhizobacteria, or PGPR, has been with us for over 30 years. In the rhizosphere, the space immediately surrounding the roots of a plant, a complex series of interactions between the plant, microorganisms and the soil is in place. This unique environment supports a microflora that includes both beneficial and pathogenic microorganisms and exerts a significant influence on the growth and productivity of plants.
