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Biosurfactant production by Arctic and Antarctic bacteria growing on hydrocarbons

Malavenda, Roberta; Rizzo, Carmen; Michaud, Luigi; Gerçe, Berna; Bruni, Vivia; Syldatk, Christoph; Hausmann, Rudolf; Lo Giudice, Angelina

Abstract:
The risk of hydrocarbon contamination in marine polar areas is constantly increasing. Autochthonous bacteria, due to their ability to cope and survive under extreme environmental conditions, can play a fundamental role in the hydrocarbon degradation. The degradation process is often enhanced by the production of biosurfactant molecules. The present study reports for the first time on the isolation of biosurfactant-producing bacteria from Arctic and Antarctic shoreline sediments. A total of 199 psychrotolerant bacterial isolates were obtained from hydrocarbon-amended (with crude or diesel oil) microcosms. A total of 18 isolates were selected for their ability to grow in the presence of crude oil and produce biosurfactants, as it was revealed by the production of good E24 values (≥50 %) and/or reduction in the surface tension (under 30 mN/m). The positive response of the isolates to both tests suggests a possible production of biosurfactants with emulsifying and interfacial activities. Biosurfactant-producing isolates were mainly affiliated to the genera Rhodococcus (14 isolates), followed by Pseudomonas (two isolates), Pseu ... mehr


Zugehörige Institution(en) am KIT Institut für Bio- und Lebensmitteltechnik (BLT)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator DOI: 10.1007/s00300-015-1717-9
ISSN: 0722-4060
KITopen ID: 1000048171
Erschienen in Polar Biology
Seiten 10 S.
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