Photolytic and Microbial Degradation of 3,5,6-Trichloro-2-Pyridinol

Feng, Yanfang; Minard, Robert D.; Bollag, Jean‐Marc

doi:10.1897/1551-5028(1998)017<0814:pamdot>2.3.co;2

Cited by 3 publications

(4 citation statements)

References 15 publications

(23 reference statements)

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“…Later the same group, on the basis of combined experiments with photolysis and microbial degradation, suggested that TCP was metabolized by a Pseudomonas sp. by a reductive dechlorination pathway (Feng et al , 1998). In this pathway, TCP is first reductively dechlorinated into chlorodihydro‐2‐pyridone, which is further dechlorinated to tetra‐hydro‐2‐pyridone.…”

Section: Microbial Degradation Of Organophosphorus Compoundsmentioning

confidence: 99%

Microbial degradation of organophosphorus compounds

Singh¹,

Walker²

2006

FEMS Microbiol Rev

961

524

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Synthetic organophosphorus compounds are used as pesticides, plasticizers, air fuel ingredients and chemical warfare agents. Organophosphorus compounds are the most widely used insecticides, accounting for an estimated 34% of world-wide insecticide sales. Contamination of soil from pesticides as a result of their bulk handling at the farmyard or following application in the field or accidental release may lead occasionally to contamination of surface and ground water. Several reports suggest that a wide range of water and terrestrial ecosystems may be contaminated with organophosphorus compounds. These compounds possess high mammalian toxicity and it is therefore essential to remove them from the environments. In addition, about 200,000 metric tons of nerve (chemical warfare) agents have to be destroyed world-wide under Chemical Weapons Convention (1993). Bioremediation can offer an efficient and cheap option for decontamination of polluted ecosystems and destruction of nerve agents. The first micro-organism that could degrade organophosphorus compounds was isolated in 1973 and identified as Flavobacterium sp. Since then several bacterial and a few fungal species have been isolated which can degrade a wide range of organophosphorus compounds in liquid cultures and soil systems. The biochemistry of organophosphorus compound degradation by most of the bacteria seems to be identical, in which a structurally similar enzyme called organophosphate hydrolase or phosphotriesterase catalyzes the first step of the degradation. organophosphate hydrolase encoding gene opd (organophosphate degrading) gene has been isolated from geographically different regions and taxonomically different species. This gene has been sequenced, cloned in different organisms, and altered for better activity and stability. Recently, genes with similar function but different sequences have also been isolated and characterized. Engineered microorganisms have been tested for their ability to degrade different organophosphorus pollutants, including nerve agents. In this article, we review and propose pathways for degradation of some organophosphorus compounds by microorganisms. Isolation, characterization, utilization and manipulation of the major detoxifying enzymes and the molecular basis of degradation are discussed. The major achievements and technological advancements towards bioremediation of organophosphorus compounds, limitations of available technologies and future challenge are also discussed.

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Section: Microbial Degradation Of Organophosphorus Compoundsmentioning

confidence: 99%

Microbial degradation of organophosphorus compounds

Singh¹,

Walker²

2006

FEMS Microbiol Rev

961

524

View full text Add to dashboard Cite

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“…ATCC 700113 degraded the reductive dechlorination products of TCP generated by photolysis, suggesting that Pseudomonas sp. ATCC 700113 utilizes a reductive dechlorination pathway in degrading TCP (18). However, we propose that TCP is dechlorinated by oxidative and hydrolytic reactions in strain T6, to generate DHPD.…”

Section: Discussionmentioning

confidence: 85%

“…A reductive dechlorination mechanism was proposed in the TCP degrader Pseudomonas sp. ATCC 700113 (18), which is the well-known metabolic pathway of TCP biodegradation.…”

mentioning

confidence: 99%

Novel Gene Clusters and Metabolic Pathway Involved in 3,5,6-Trichloro-2-Pyridinol Degradation by Ralstonia sp. Strain T6

Huang

Hou

et al. 2013

Appl Environ Microbiol

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“…Although differentiation between microbial and abiotic processes in the degradation of chlorpyrifos to TCP is not clear, further degradation of TCP has been generally considered to occur through microbial processes [2,15,17]. Feng et al [27,28] isolated a bacterium from an agricultural soil that can use TCP as a sole source of carbon and energy under aerobic laboratory conditions. However, degradation of TCP did not occur in the presence of the bacteria in the animalderived effluents collected from the Baker Farm in this study.…”

Section: Discussionmentioning

confidence: 99%

Impact of animal waste lagoon effluents on chlorpyrifos degradation in soils

Huang

Lee

Nakatsu

2000

Enviro Toxic and Chemistry

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Abstract-Animal-derived lagoon effluents are a good source of inorganic nutrients and organic matter; however, they may impact the degradation and transport of soil-applied pesticides. The degradation of chlorpyrifos in poultry-, swine-, and cow-derived effluents and effluent-soil matrices were studied using batch and column incubation studies. Chlorpyrifos was degraded by aerobic microbial processes in animal-derived lagoon effluents. Microbial community analysis by denaturing gradient gel electrophoresis of polymerase chain reaction-amplified 16S ribosomal ribonucleic acid genes showed that a single band became dominant in effluent during chlorpyrifos degradation. In soils, both biotic and abiotic degradation contributed significantly to the overall dissipation of chlorpyrifos. Large differences in degradation rates were observed between soils, with the fastest rate observed in soil with higher pH and cation-exchange capacity. Effluents appeared to have only a minor effect on chlorpyrifos degradation in soils, although effluent-induced increases in soil-solution pH over time may enhance hydrolysis by a few percent in low-pH soils. Soil properties, not effluent properties, appear to control chlorpyrifos degradation under laboratory conditions; however, the impact on changes in soil properties and microbial ecology with long-term effluent irrigation warrants further investigation.

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Photolytic and Microbial Degradation of 3,5,6-Trichloro-2-Pyridinol

Cited by 3 publications

References 15 publications

Microbial degradation of organophosphorus compounds

Microbial degradation of organophosphorus compounds

Novel Gene Clusters and Metabolic Pathway Involved in 3,5,6-Trichloro-2-Pyridinol Degradation by Ralstonia sp. Strain T6

Impact of animal waste lagoon effluents on chlorpyrifos degradation in soils

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