NDLI: Biosurfactants, an help in the biodegradation of hexadecane? The case of Rhodococcus and Pseudomonas strains

Content Provider	Springer Nature Link
Author	Bouchez Naïtali, Murielle Vandecasteele, Jean Paul
Copyright Year	2008
Abstract	The roles of the extracellular biosurfactants produced by two bacterial strains, Pseudomonas aeruginosa GL1 and Rhodococcus equi Ou2, in hexadecane uptake and biodegradation were compared. For this purpose, cell hydrophobicity and production of glycolipidic biosurfactants were evaluated during bacterial growth on hexadecane, as well the effects of these biosurfactants on culture supernatants properties i.e., surface and interfacial tensions, and emulsification and pseudosolubilization capacities. The results showed that the role of biosurfactants was different in these two strains and was directly related to the hydrophobicity of the bacterial cells concerned. Extracellular biosurfactants produced by strain R. equi Ou2 had only a minor role in hexadecane degradation. Direct interfacial accession appeared to be the main mechanism for hexadecane uptake by the hydrophobic cells of strain R. equi Ou2. On the contrary, the biosurfactants produced by P. aeruginosa GL1 were required for growth on hexadecane, and their pseudosolubilization capacity rather than their emulsification capacity was involved in substrate degradation, allowing uptake from hexadecane micelles by the hydrophilic cells of this bacterium. The roles of biosurfactants thus differ widely among bacteria degrading hydrophobic compounds.
Starting Page	1901
Ending Page	1907
Page Count	7
File Format	PDF
ISSN	09593993
Journal	World Journal of Microbiology and Biotechnology
Volume Number	24
Issue Number	9
e-ISSN	15730972
Language	English
Publisher	Springer Netherlands
Publisher Date	2008-02-20
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Alkane biodegradation Bioremediation Cell hydrophobicity Emulsification Insoluble substrate Pseudosolubilization Microbiology Environmental Engineering/Biotechnology Biochemistry Biotechnology Applied Microbiology
Content Type	Text
Resource Type	Article
Subject	Physiology Medicine Applied Microbiology and Biotechnology Biotechnology

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