Fig. 1.

(A) Growth of pure isolates of rhizobacteria on agar plates prepared from the diluted crude juice (1:10–1:100, v/v) of the cactus O. ficus-indica. (B) Recovery of endophytic rhizobacteria associated with plant roots on various culture media. Normal distinctive colonies of rhizobacteria associated with the roots of Aloe vera developed on agar plates of plant-based culture media (inoculated with similar aliquots of the same root dilution, 10^–2), prepared from diluted juices (1:20, v/v) of A. vera and A. arborescens in comparison with those developed on synthetic standard culture media (nutrient agar and CCM).