One alternative for growing plants under dry conditions isthe use of plant growth promoting rhizobacteria (PGPR). PGPRare a group of bacteria that can be found in the rhizospherein association with plant root systems, both at the root surfaceand in endophytic associations, and which can either directlyor indirectly facilitate plant growth in optimal, biotic, or abioticstress conditions (Bashan and Holguin, 1998; Cassán et al.,2009