Abstract
Four endophytic bacteria isolated from Jerusalem artichoke had the ability of plant growth promotion. These bacteria, isolate 3.13, 4.43, 5.2 and 5.18, were selected to study the promotion of plant growth in drought condition. Thus, survival of the bacteria under drought condition needed for the investigation. All four isolates showed the growth in Nutrient Broth (NB) containing 20% Polyethylene Glycol (PEG). Moreover, all four isolates were tested their survival in NB with 20% PEG and soil by incubating at 30, 35, 40 and 45â—¦C. Reasonable survival was observed in all isolates at 30 to 40â—¦C of both media. Furthermore, isolate 5.18 demonstrated the growth at 45â—¦C and maintained cell numbers at 4.19A—104 CFU/mL after 29 days and 1.30A—107 CFU/mL after 57 days in NB with 20% PEG and in the soil, respectively.
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