Hydroxylation of the herbicide isoproturon by fungi isolated from agricultural soil

Article Abstract:

The representatives of the fungal community from an agricultural soil are isolated to study their potential for isoproturon transformation and to identify the transformation products. Among the fungi that were isolated, asco-, basidio-, and zygomycetes were found to transform isoproturon mainly to 1-OH-IPU (N-(-(2-hydroxy-1-methylethyl)phenyl)-N',N'-dimethylurea) and 2-OH-IPU (N-(4-(1-hydroxy-1-methylethyl)phenyl)-N',N'-dimethylurea), thus suggesting that soil fungi could be the source of the hydroxylated metabolites of isoproturon detected in environmental samples.

Analysis, Genetic aspects, Microbial metabolism, Hydroxylation, Soil fungi

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Degradation and mineralization of nanomolar concentrations of the herbicide dichlobenil and its persistent metabolite 2,6-dichlorobenzamide by Aminobacter spp. isolated from dichlobenil-treated soils

Article Abstract:

The enrichment cultures and the isolation of 2,6-dichlorobenzamide BAM)- and dichlobenil-mineralizing Aminobacter sp. strain (MSH1) are described. The results have indicated that closely related Aminobacter stains might have a selective advantage in BAM-contaminated environments, as they can use this metabolite or structurally related compounds as a carbon and nitrogen source.

Pesticide and Other Agricultural Chemical Manufacturing, Agricultural chemicals, not elsewhere classified, Herbicides, Herbicide Preparations, Soil microbiology, Bacterial genetics, Chemical properties, Metabolites, Report

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Isolation from agricultural soil and characterization of a Sphingomonas sp. able to mineralize the phenylurea herbicide isoproturon

Article Abstract:

Researchers describe the first known bacterium that can mineralize the phenylurea herbicide isoproturon. Sphingomonas sp. strain SRS2 was isolated from soil treated with the herbicide. The proposed reaction involves two demethylations, cleavage of the methylurea side chain, and mineralization of the phenyl ring to CO(sub 2) and biomass.

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