show Abstracthide AbstractChile is a long narrow strip of land that extends over 4,000 km. Within its territory, there are two regions with opposite extreme environmental conditions: the Antarctic and the Atacama Desert, both of which have a diversity of microorganisms adapted to survive in extreme conditions. For this reason, it has been of great interest to determine the genetic and molecular mechanisms that allow them to establish themselves in these habitats and to contrast the differences between these heterogeneous climates, which has led to the discovery of new bacteria that have not yet been described. Therefore, it is of great interest to study the rhizosphere of plants, such as Croton chilensis, Eulychnia iquiquensis, Nicotiana solanifolia (Paposo, Antofagasta region), Deschampsia antarctica, and Colobanthus quitensis (King George Island, Antarctic Territory).