title: Microbial metabolism of fluazifop-butyl.
abstract: A microbial mixed culture able to grow on fluazifop-butyl and fluazifop was isolated. Fluazifop degradation by this microbial population was studied either when the herbicide was applied as the sole carbon source or in the presence of a second carbon source (sodium acetate or sodium propionate). The degradation rate was enhanced by sodium propionate. The degradation was found to be stereoselective. The S-enantiomer of fluazifop was degraded at a much higher rate than the R-enantiomer. Fluazifop disappearance was accompanied by formation of three metabolites which were identified by UV, IR, MS and NMR analyses. The metabolites were shown to be: 4-(5-trifluoromethyl-2-pyridyl)oxyphenol, 5-trifluoromethyl-2- hydroxypyridine and 2-(5-trifluoro-methyl pyridyl)hydroxy acetate.
authors.affiliation: Dipartimento di Valorizzazione e Protezione delle, Risorse Agroforestali Università di Torino, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Nègre
authors.forename: M
authors.initials: M
authors.lastname: Gennari
authors.forename: V
authors.initials: V
authors.lastname: Andreoni
authors.forename: R
authors.initials: R
authors.lastname: Ambrosoli
authors.forename: L
authors.initials: L
authors.lastname: Celi
mesh_terms: D000085:Acetates / Q000378:metabolism; D019342:Acetic Acid; D001673:Biodegradation, Environmental; D002851:Chromatography, High Pressure Liquid; D004095:Dihydropyridines / Q000378:metabolism; D004305:Dose-Response Relationship, Drug; D006540:Herbicides / Q000378:metabolism*; D011422:Propionates / Q000378:metabolism; D011725:Pyridines / Q000378:metabolism*; D012988:Soil Microbiology; D013057:Spectrum Analysis
chemical_list: D000085:Acetates; D004095:Dihydropyridines; D006540:Herbicides; D011422:Propionates; D011725:Pyridines; C050585:fluazifop-butyl; C050582:fluazifop; C514135:sodium propionate; C029658:propionic acid; D019342:Acetic Acid