The general objective of this line of research in to gain basic and applied knowledge on the ecology, physiology, molecular biology, genomics and biotechnology of rhizobacteria, arbuscular mycorrhiza and rhizospheric fungi to understand physiological and molecular mechanisms underlying microbe-plant interactions, allowing their application in processes of biofertilization, biodegradation and biocontrol to improve the sustainability of agrosystems and environmental quality. Keywords: Arbuscular mycorrhizas, Rhizobacteria, Rhizobiaceae, Saprobe and endophytic fungi, Nitrogen fixation, Molecular ecology, Microbial diversity, Functional genomics, Mobilome, Rhizosphere interactions and signalling, Nutrient transport and metabolism, Stress tolerance, Biological control, Mycorrhiza induced resistance, Plant Defense, Microbial Virulence, Phytoremediation, Genetic Engineering, Waste Recycling, Microbial inoculants, Environmental Sustainability.