Bacteria Halotolerant from Karst Sinkholes as a Source of Biosurfactants and Bioemulsifiers.

ABSTRACT: Halotolerant bacteria with biosurfactant (BS) and bioemulsifiers (BE) activity can coexist in Karstic sinkholes with marine influence. Two sinkholes in the Yucatan peninsula were selected to isolate bacteria with BE and BS activity stable in NaCl. The optimal time, the effect of nitrogen and carbon source in the medium, and the conditions (agitation, pH and salinity) for the production of BS and BE compounds in planktonic and sessile (stimulate the formation of biofilms in cell roller) culture were determined. Eighty strains showed the highest emulsification activity (EI₂₄ ≥ 50%) and drop-collapse ≥ 4 mm. 87% of the strains are moderately halotolerant, and 21% bordered the limit of extreme halotolerance. Twenty-four strains maintained or improved their BS and BE activity under s

SUBMITTER: Maldonado Desena F 

PROVIDER: S-EPMC9319531 | biostudies-literature | 2022 Jun

REPOSITORIES: biostudies-literature