Multiple and flexible roles of facultative anaerobic bacteria in microaerophilic oleate degradation.

Environmental Microbiology
M Salomé DuarteM M Alves

Abstract

Anaerobic degradation of long-chain fatty acids (LCFA) involves syntrophic bacteria and methanogens, but facultative anaerobic bacteria (FAB) might have a relevant role as well. Here we investigated oleate degradation by a syntrophic synthetic co-culture of Syntrophomonas zehnderi (Sz) and Methanobacterium formicicum (Mf) and FAB (two oleate-degrading Pseudomonas spp. I1 + I2). Sz + Mf were first cultivated in a continuous bioreactor under strict anaerobic conditions. Thereafter, I1 + I2 were inoculated and microaerophilic conditions were provided. Methane and acetate were the main degradation products by Sz + Mf in anaerobiosis and by Sz + Mf + I1 + I2 in microaerophilic conditions. However, acetate production from oleate was higher in microaerophilic conditions (5% O2 ) with the four microorganisms together (0.41 ± 0.07 mmol day-1 ) than in anaerobiosis with Sz + Mf (0.23 ± 0.05 mmol day-1 ). Oleate degradation in batch assays was faster by Sz + Mf + I1 + I2 (under microaerophilic conditions) than by Sz + Mf alone (under strict anaerobic conditions). I1 + I2 were able to grow with oleate and with intermediates of oleate degradation (hydrogen, acetate and formate). This work highlights the importance of FAB, particularly Pseud...Continue Reading

References

Jun 6, 2003·Bioscience, Biotechnology, and Biochemistry·Volker RiisWolfgang Babel
Apr 1, 1993·Applied and Environmental Microbiology·A J StamsC M Plugge
Mar 3, 2007·International Journal of Systematic and Evolutionary Microbiology·Diana Z SousaAlfons J M Stams
Apr 2, 2008·Annals of the New York Academy of Sciences·Michael J McInerneyRobert P Gunsalus
Jun 6, 2009·FEMS Microbiology Ecology·Diana Z SousaAlfons J M Stams
Aug 1, 2002·FEMS Microbiology Ecology·Maria Alcina PereiraAntoon D L Akkermans
Sep 1, 2009·Microbial Biotechnology·M Madalena AlvesAlfons J M Stams
Dec 31, 2011·Bioresource Technology·Manel Garrido BaserbaDimitar Karakashev
Jun 16, 2012·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Alfons J M StamsCaroline M Plugge
Jan 27, 2016·Environmental Science & Technology·Ana Júlia CavaleiroDiana Z Sousa

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