Successful and unexpected potential of entomopathogen Bacillus thuringiensis as plant growth promoting rhizobacterium

Abstract

The microbiology of the rhizosphere has been investigated since 1904, revealing innumerable rhizomic microorganisms that promote growth in swamps (RPCPs), which have attracted a special interest to improve agroecological practices, crop productivity and protect soils from environmental contamination under a agricultural sustainability approach. This review addresses a topic as extensive as it is fascinating, beginning with the characteristics of soil microbiology. It also describes how RPCPs associated with plant roots offer greater crop growth through direct and indirect strategies. Also mention the complexity of plant growth and how it is done simultaneously through numerous metabolic activities. The bacterial genera of RPCP, the metabolic characteristics and the potential of entomopathogenic bacteria Bacillus thuringiensis (Bt) to be considered as RPCP are mentioned. Finally, the little known properties of Bt are exposed to benefit the growth of plants, their effectiveness in biocontrol of phytopathogens, as biofertilizers and / or biostimulants in crops. New perspectives are proposed to develop Bt products as a growth promoter in the near future. It is important to recognize that applied research of rhizosphere crops can be one of the key factors in achieving the sustainable yield of agriculture.