Persistence and mutagenic potential of herbicide-derived aniline residues in pond water

Lyons, Curtis D.; Katz, Stanley E; Bartha, Richárd

doi:10.1007/bf01636575

Cited by 46 publications

(16 citation statements)

References 11 publications

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“…1,2) Aniline is a synthetic compound used in dyes and herbicides. 2,3) Aniline is also one of the most important chemical products in industry as synthetic intermediate. 4) Aniline is widely used in polyurethane, rubber, agricultural chemicals, and, to a limited extent, in food and medical products.…”

Section: Introductionmentioning

confidence: 99%

“…5,6) Therefore, many researchers have warned people about the toxicity and carcinogenicity of aniline. 3,7) Recently, many studies on aniline mainly focused on biodegradability, metabolic pathway by pure culture of microorganisms and removal of aniline in wastewater treatment systems. [8][9][10][11][12][13][14] Studies researching into the degradation of aniline by bacteria as the sole source of carbon have been done by many researchers.…”

Section: Introductionmentioning

confidence: 99%

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Biodegradation of Endocrine-Disrupting Chemical Aniline by Microorganisms

Takano

Hachiyanagi

Yamamoto

et al. 2009

JOURNAL OF HEALTH SCIENCE

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biodegradation of Endocrine-Disrupting Chemical Aniline by Microorganisms

Takano

Hachiyanagi

Yamamoto

et al. 2009

JOURNAL OF HEALTH SCIENCE

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“…They are also formed in the environment during the microbial transformation of nitroaromatic compounds and aniline-based pesticides (Kearney & Kaufman, 1975). Since many of them are known to be toxic, mutagenic and carcinogenic (Crabtree et al, 1991;Chung et al, 1997;Bhunia et al, 2003), their fate in the environment and biodegradation have been extensively studied (Bollag et al, 1978;Lyons et al, 1984Lyons et al, , 1985.…”

Section: Introductionmentioning

confidence: 99%

Chromosome-encoded gene cluster for the metabolic pathway that converts aniline to TCA-cycle intermediates in Delftia tsuruhatensis AD9

et al. 2005

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Delftia tsuruhatensis AD9 was isolated as an aniline-degrading bacterium from the soil surrounding a textile dyeing plant. The gene cluster involved in aniline degradation was cloned from the total DNA of strain AD9 into Escherichia coli JM109. After shotgun cloning, two recombinant E. coli strains showing aniline oxidation activity or catechol meta-cleavage activity were obtained by simple plate assays. These strains contained 9?3 kb and 15?4 kb DNA fragments, respectively. Sequence analysis of the total 24?7 kb region revealed that this region contains a gene cluster (consisting of at least 17 genes, named tadQTA1A2BRD1C1D2C2EFGIJKL) responsible for the complete metabolism of aniline to TCA-cycle intermediates. In the gene cluster, the first five genes (tadQTA1A2B) and the subsequent gene (tadR) were predicted to encode a multi-component aniline dioxygenase and a LysR-type regulator, respectively, while the others (tadD1C1D2C2EFGIJKL) were expected to encode meta-cleavage pathway enzymes for catechol degradation. In addition, it was found that the gene cluster is surrounded by two IS1071 sequences, indicating that it has a class I transposon-like structure. PFGE and Southern hybridization analyses confirmed that the tad gene cluster is encoded on the chromosome of strain AD9 in a single copy. These results suggest that, in strain AD9, aniline is degraded via catechol through a meta-cleavage pathway by the chromosome-encoded tad gene cluster. The tad gene cluster showed significant similarity in nucleotide sequence and genetic organization to the plasmid-encoded aniline degradation gene cluster of Pseudomonas putida UCC22.

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“…As cloroanilinas são insumos importantes na síntese de herbicidas (espalhadas no ambiente de forma dispersa), representando problema ambiental pela característica xenobiótica dos compostos aromáticos clorados. Muitos desses compostos apresentam toxicidade elevada, alguns sendo carcinogênicos (LYONS et al, 1985;HEIN et al, 1991). No entanto, certas bactérias são capazes de transformar essas moléculas, a exemplo de Pseudomonas e Acinetobacter dentre outras.…”

Section: Introductionunclassified

INDUÇÃO DA ENZIMA PIROCATECASE POR Acinetobacter baumanii ENVOLVIDA NA BIODEGRADAÇÃO DO HERBICIDA DIURON

Scramin¹,

Dentzien²,

Melo³

2003

PES

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Uma linhagem de Acinetobacter baumanii, isolada da rizosfera de cana-de-açúcar, cultivada em solos tratados com Diuron foi incubadada em diferentes substratos para verificar a presença de catecol 1,2- dioxigenase (pirocatecase). Diferentes indutores foram adicionados ao meio de cultura (glicose, benzoato de sódio, Diuron, dicloroanilina, benzoato de sódio + glicose, benzoato de sódio + dicloroanilina, Diuron + glicose). As células bacterianas, obtidas pelo processo fermentativo, foram coletadas após centrifugação e rompidas por sonicação para extração da enzima intracelular. A linhagem apresentou alta atividade enzimática quando benzoato de sódio ou benzoato de sódio + glicose ou benzoato de sódio + dicloroanilina foram adicionados ao meio de cultura. A atividade enzimática acompanhou a produção de biomasa. No estudo da cinética de crescimento, usando Diuron como fonte de carbono e em três diferentes pH, essa linhagem apresentou melhor resultado quando cultivada em pH 6,8. Verificou-se pela avaliação da capacidade de A. baumanii transformar o Diuron, que o metabólito 3,4-dicloroanilina (3,4-DCA) não foi produzido. PYROCATECHASE INDUCED BY Acinetobacter baumanii INVOLVED IN THE BIODEGRADATION OF THE HERBICIDE DIURON Abstract An Acinetobacter baumanii strain, isolated from Diuron treated sugarcane rhizosphere, was grown in different substrates in order to determine the catechol 1,2-dioxygenase (pyrocatechase) presence. Different inducers were added to the culture media (glucose, sodium benzoate, Diuron, dichloroaniline, sodium benzoate plus glucose, sodium benzoate plus dichloroaniline, and Diuron plus glucose). The bacterial cells were harvested by centrifugation and disrupted by sonication for intracellular enzyme extraction. The strain showed high activity of pyrocatechase when sodium benzoate or sodium benzoate plus glucose or sodium benzoate plus dicloroaniline were added to the culture media. The enzymatic activity followed the biomass production. According to the growing kinetics study using Diuron as a carbon source, and with three different pH, this strain showed the best result when growed at pH 6.8. Estimating the A. baumanii capacity of transforming Diuron, it was observed that the 3,4-dichloroaniline (3,4-DCA) metabolite was not produced.

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Persistence and mutagenic potential of herbicide-derived aniline residues in pond water

Cited by 46 publications

References 11 publications

Biodegradation of Endocrine-Disrupting Chemical Aniline by Microorganisms

Biodegradation of Endocrine-Disrupting Chemical Aniline by Microorganisms

Chromosome-encoded gene cluster for the metabolic pathway that converts aniline to TCA-cycle intermediates in Delftia tsuruhatensis AD9

INDUÇÃO DA ENZIMA PIROCATECASE POR Acinetobacter baumanii ENVOLVIDA NA BIODEGRADAÇÃO DO HERBICIDA DIURON

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