Phenotypic characterization of bacterial collection isolated from the lateritic ore Yagrumaje Norte, Holguin, Cuba
Keywords:
ultramafic soils, extreme ecosystem, adsorption, bacterial resistance, bioactive metabolitesAbstract
In this work, a collection compose by fourteen bacteria isolated from an
ore, Yagrumaje Norte, Holguín, Cuba)was phenotypically characterized. Five
strains were classified as Serratiamarcescens, four as Escherichia coli, two as
Enterobacteraerogenes, and threeas Ochrobactrum anthropi. 71.4% of
strains were resistant to nickel. This is the first report of the isolation of
Ochrobactrum anthropi from serpentine soils and nickel resistance in this
species. The 85.7% of the strains were able to solubilize inorganic phosphate
and 50%to fix atmospheric nitrogen. The five strains of Serratia marcescensshowed a non-pigmented phenotypeand have the potentiaities to produce enzymes as lipases, phospholipases,
caseinases, gelatinases and nucleases. All strains were capable to remove Ni(II) and Co(II) from 25 and 30 ppm
monometallic solution respectively. These results suggest that extreme environments are potential sources of
bioactive metabolites with potential application in agricultural, medical biotechnologies and environmentally
friendly technologies.