| Summary: | In this work, endophytic bacteria from the nickel hyperaccumulating plant Leucocroton havanensis are characterized. Three strains belonging to Bacillus genus were used. It was evaluated the tolerance to Ni (II), the influence of temperature and pH in growth, as well as the influence of metal in the production of indolacetic acid, ammonia and in the biological fixation of dinitrogen. Bacterial solubilization of nickel was determined. The strains grew in temperature intervals of 30-50 °C, at pH values of 5- 9 and up to 10 mmol. L-1 Ni (II). The strains produce AIA, ammonia and fix dinitrogen in the presence of 5 mmol. L-1 of nickel. In addition, they solubilize more than 70% of the nickel incorporated in the culture medium in the form of nickel carbonate. Endophytic bacteria of L. havanensis present characteristics that make them interesting to be evaluated in phytoremediation alternatives.
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