Isolation of mesotrione-degrading bacteria from aquatic environments in Brazil

► Pantoea ananatis was isolated in a Brazilian river near mesotrione treated fields. ► This bacterium completely degrades mesotrione without producing toxic substances. ► P. ananatis does not use mesotrione as carbon, nitrogen or sulfur source. ► The degradation probably goes through a cometabolic p...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2012-03, Vol.86 (11), p.1127-1132
Main Authors: Pileggi, Marcos, Pileggi, Sônia Alvim Veiga, Olchanheski, Luiz Ricardo, da Silva, Paulo Augusto Garbugio, Munoz Gonzalez, Ana M., Koskinen, Willian C., Barber, Brian, Sadowsky, Michael Jay
Format: Article
Language:English
Subjects:
Applied sciences
aquatic environment
bacteria
Bacteria - genetics
Bacteria - isolation & purification
Bacteria - metabolism
benzoic acid
Biodegradation
Biodegradation, Environmental
Biological and medical sciences
Biological and physicochemical phenomena
Biological treatment of waters
Bioremediation
Biotechnology
Brazil
Callisto
corn
Cyclohexanones - analysis
Cyclohexanones - metabolism
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environment and pollution
Exact sciences and technology
Fresh Water - chemistry
Fresh Water - microbiology
Fundamental and applied biological sciences. Psychology
glucose
Herbicides - analysis
Herbicides - metabolism
Industrial applications and implications. Economical aspects
mesotrione
metabolism
Natural water pollution
Pantoea - genetics
Pantoea - isolation & purification
Pantoea - metabolism
Pantoea ananatis
Pollution
Pollution, environment geology
Water Pollutants, Chemical - analysis
Water Pollutants, Chemical - metabolism
Water treatment and pollution
Xenobiotic
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Summary:► Pantoea ananatis was isolated in a Brazilian river near mesotrione treated fields. ► This bacterium completely degrades mesotrione without producing toxic substances. ► P. ananatis does not use mesotrione as carbon, nitrogen or sulfur source. ► The degradation probably goes through a cometabolic pathway. ► Callisto® adjutants prevent P. ananatis growth in herbicide high concentrations. Mesotrione is a benzoylcyclohexane-1,3-dione herbicide that inhibits 4-hydroxyphenyl pyruvate dioxygenase in target plants. Although it has been used since 2000, only a limited number of degrading microorganisms have been reported. Mesotrione-degrading bacteria were selected among strains isolated from Brazilian aquatic environments, located near corn fields treated with this herbicide. Pantoea ananatis was found to rapidly and completely degrade mesotrione. Mesotrione did not serve as a sole C, N, or S source for growth of P. ananatis, and mesotrione catabolism required glucose supplementation to minimal media. LC–MS/MS analyses indicated that mesotrione degradation produced intermediates other than 2-amino-4-methylsulfonyl benzoic acid or 4-methylsulfonyl-2-nitrobenzoic acid, two metabolites previously identified in a mesotrione-degrading Bacillus strain. Since P. ananatis rapidly degraded mesotrione, this strain might be useful for bioremediation purposes.
ISSN:0045-6535
1879-1298
1879-1298
DOI:10.1016/j.chemosphere.2011.12.041