This area suffers from drought and low nutrients availability and, as a result, desertification. Bt was the most abundant cultivable bacterial type in such arid soil. The bacterium was isolated from the above-mentioned soil (a mixture of rhizospheres from several autochthonous plant species). A homogenate of 1 g soil in 9 mL sterile water was diluted (102 to 104), plated on three different media [Agar Yeast Mannitol, Dextrose Potato agar or LuriaeBertani agar (LB)] and then incubated at 28 C for 48 h, to isolate bacteria from different taxonomic groups.