Salicylate biodegradation by various algal-bacterial consortia under photosynthetic oxygenation.
Four green microalgae (Chlorella sorokiniana, Chlorella vulgaris, Scenedesmus obliquus and Selenastrum capricornutum), a wild Bolivian microalga strain and two cyanobacteria (Anabaena catenula and Microcystis aeruginosa) were compared for tolerance to salicylate, O2 production capacity and ability to support salicylate degradation by a Ralstonia basilensis strain in symbiotic microcosms with the microalgae. Microcystis aeruginosa had the highest tolerance to salicylate at 500 mg l(-1) and 1500 mg l(-1) but only produced 0.7 mg O2 l(-1) h(-1) in the absence of pollutant. Chlorella sorokiniana resisted salicylate at 1500 mg l(-1) with the highest O2 production in the absence of salicylate (26 mg l(-1) h(-1)) closely followed by the Bolivian microalga (23 mg l(-1) h(-1)) and Chlorella vulgaris (21 mg l(-1) h(-1)). Selenastrum capricornutum and Anabaena catenula were completely inhibited by salicylate at 500 mg l(-1). When inoculated with Ralstonia sp. and supplied with salicylate, Chlorella sorokiniana had the highest removal rate (19 mg l(-1) h(-1)), followed by the wild Bolivian strain (18 mg l(-1) h(-1)) and Chlorella vulgaris (14 mg l(-1) h(-1)).
Muñoz
Raul
R
Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, S-22 100 Lund, Sweden.
Köllner
Claudia
C
Guieysse
Benoit
B
Mattiasson
Bo
B
D001673:Biodegradation, Environmental; D018929:Cell Culture Techniques / Q000379:methods; D000460:Chlorophyta / Q000254:growth & development / Q000378:metabolism*; D018920:Coculture Techniques / Q000379:methods*; D000458:Cyanobacteria / Q000145:classification / Q000254:growth & development / Q000378:metabolism*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000378:metabolism*; D010788:Photosynthesis / Q000502:physiology*; D043367:Ralstonia / Q000145:classification / Q000254:growth & development / Q000378:metabolism*; D012459:Salicylates / Q000378:metabolism*; D013045:Species Specificity; D013559:Symbiosis / Q000502:physiology*
D012459:Salicylates; D010100:Oxygen