Résumé:
The microorganisms having a tolerance with metals and able to promote the vegetable growth,
can play a significant role in cured of grounds contaminated by metals. This work consists to
check the tolerance of some PGPR to heavy metals (Co, Cu, Cd and Pb). To achieve this goal, we
inoculate stocks (B, D, E and F) (young culture of 18h). Which were isolated from the rizosphere
of the ground, gifts a medium LB has various concentrations (50% 100% AND 200%) for each
metal, after an incubation of 72h with 30°C; results based of statistical analysis. Certain stocks
are tolerated in heavy metal presence, of weak dialogues and even into strong dialogues, and of
another stocks does not resist any more weak and even of the strong one consultation. Compared
to stocks not inoculated with heavy metals (0%). Conclusions, taking account of the potential of
heavy metals on the growth of the bacteria one can recommend its practical application in the
phytoremediation or the bioremediation of contaminated grounds.
