Biodegradation of the herbicide diuron by streptomycetes isolated from soil

Castillo, M.A.; Felis, N.; Aragón, Pilar; Cuesta, G.; Sabater, C.

doi:10.1016/j.ibiod.2006.06.020

Cited by 56 publications

(40 citation statements)

References 32 publications

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“…Furthermore, it has been shown that different fungi, either obtained from various culture collections or freshly isolated from agricultural soils, are capable of degrading diuron (8,20,29,52). However, neither the bacterial nor fungal diurondegrading strains have been shown conclusively to mineralize the ring structure of diuron, and with the majority of the strains potentially harmful metabolites, such as 3,4-DCA, accumulate.…”

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confidence: 99%

Rapid Mineralization of the Phenylurea Herbicide Diuron by Variovorax sp. Strain SRS16 in Pure Culture and within a Two-Member Consortium

Sørensen

Albers

Aamand

2008

Appl Environ Microbiol

136

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The phenylurea herbicide diuron [N-(3,4-dichlorophenyl)-N,N-dimethylurea] is widely used in a broad range of herbicide formulations, and consequently, it is frequently detected as a major water contaminant in areas where there is extensive use. We constructed a linuron [N-(3,4-dichlorophenyl)-N-methoxy-N-methylurea]-and diuron-mineralizing two-member consortium by combining the cooperative degradation capacities of the diuron-degrading organism Arthrobacter globiformis strain D47 and the linuron-mineralizing organism Variovorax sp. strain SRS16. Neither of the strains mineralized diuron alone in a mineral medium, but combined, the two strains mineralized 31 to 62% of the added [ring-U-14 C]diuron to 14 CO 2 , depending on the initial diuron concentration and the cultivation conditions. The constructed consortium was used to initiate the degradation and mineralization of diuron in soil without natural attenuation potential. This approach led to the unexpected finding that Variovorax sp. strain SRS16 was able to mineralize diuron in a pure culture when it was supplemented with appropriate growth substrates, making this strain the first known bacterium capable of mineralizing diuron and representatives of both the N,N-dimethyl-and N-methoxy-N-methyl-substituted phenylurea herbicides. The ability of the coculture to mineralize microgram-per-liter levels of diuron was compared to the ability of strain SRS16 alone, which revealed the greater extent of mineralization by the two-member consortium (31 to 33% of the added [ring-U-14 C]diuron was mineralized to 14 CO 2 when 15.5 to 38.9 g liter ؊1 diuron was used). These results suggest that the consortium consisting of strains SRS16 and D47 could be a promising candidate for remediation of soil and water contaminated with diuron and linuron and their shared metabolite 3,4-dichloroaniline.

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confidence: 99%

Rapid Mineralization of the Phenylurea Herbicide Diuron by Variovorax sp. Strain SRS16 in Pure Culture and within a Two-Member Consortium

Sørensen

Albers

Aamand

2008

Appl Environ Microbiol

136

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“…Even the most stable compounds are transformed by microorganisms to less-toxic forms (Bending et al 2007). According to Castillo et al (2006), degradation of pesticides is a multi-stage process, which is effected by a consortia of microorganisms, i.e. by enzymes produced by such microorganisms.…”

Section: Resultsmentioning

confidence: 99%

Bioaugmentation of Soil Contaminated with Azoxystrobin

Baćmaga

Wyszkowska

Kucharski

2016

Water Air Soil Pollut

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The presence of fungicides in the natural environment, either resulting from deliberate actions or not, has become a serious threat to many ecosystems, including soil. This can be prevented by taking appropriate measures to clear the environment of organic contamination, including fungicides. Therefore, a study was conducted aimed at determining the effect of bioaugmentation of soil exposed to azoxystrobin on its degradation and activity of selected enzymes (dehydrogenases, catalase, urease, acidic phosphatase, alkaline phosphatase). A model experiment was conducted for 90 days on two types of soil: loamy sand (pHKCl—5.6) and sandy loam (pHKCl—7.0), which were contaminated by azoxystrobin at 22.50 mg kg−1 DM of soil and inoculated with a specific consortium of microorganisms. Four strains of bacteria were used in the experiment (Bacillus sp. LM655314.1, B. cereus KC848897.1, B. weihenstephanensis KF831381.1, B. megaterium KJ843149.1) and two strains of mould fungi (Aphanoascus terreus AB861677.1, A. fulvescens JN943451.1). Inoculation of soil with the consortium of microorganisms accelerated the degradation of azoxystrobin. The isolated microorganisms were more active in loamy sand because within 90 days azoxystrobin was degraded by 24% (Bacillus sp., B. cereus, B. weihenstephanensis, B. megaterium) to 78% (Aphanoascus terreus, A. fulvescens). In sandy loam, azoxystrobin was degraded by 9% (Aphanoascus terreus, A. fulvescens) to 29% (Bacillus sp., B. cereus, B. weihenstephanensis, B. megaterium and Aphanoascus terreus, A. fulvescens). The activity of soil enzymes was also changed as a result of inoculation of soil with microorganisms. The activity of all of the enzymes under study was found to have increased when soil augmentation was performed.

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“…Diuron can cause adverse effects in the environment, and human exposure to the compound can result in irritation to the eyes, skin, and mucous membranes, as well as formation of methemoglobin in the blood and abnormalities in the liver and spleen [3,4]. It also acts as an endocrine disruptor, interfering in the processes of release, transport, and disposal of natural hormones in the body [4,5]. Analytical methods for the determination of diuron that have been reported in the literature include spectrometric [6], chromatographic [7], fluorimetric [8], capillary electrophoretic [9], and electrochemical [10] techniques.…”

Section: Introductionmentioning

confidence: 99%

Development of an Electrochemical Sensor Modified With MWCNT-Cooh and Mip for Detection of Diuron

Wong

Foguel

Khan

et al. 2015

Electrochimica Acta

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A B S T R A C TAn electrochemical sensor modified with a molecularly imprinted polymer (MIP) and carboxylfunctionalized multi-walled carbon nanotubes (MWCNT-COOH) was developed for the sensitive and selective detection of diuron in river water samples. An MIP was obtained by bulk polymerization using the best monomer (methacrylic acid) selected by computational simulation. The surface characteristics of the MIP and NIP (control polymer) samples were evaluated by means of surface area and pore volume determinations, using the BET method. The adsorption efficiency of the MIP was determined in adsorption tests that revealed high adsorption, relative to the control polymer. In addition, MWCNTs functionalized with carboxyl groups were used to enhance the performance of the sensor. Electrochemical studies of diuron using the MIP and MWCNT-COOH immobilized on a carbon paste electrode were performed with wave square voltammetry (SWV). The analytical parameters pH, buffer composition, and amounts of MWCNT-COOH and MIP were investigated and optimized. Excellent results were obtained with a linear range of between 5.2 Â 10 À8 and 1.25 Â 10 À6 mol L À1 , detection limit of 9.0 Â 10 À9 mol L À1 , and sensitivity of 5.1 Â10 5 mA L mol À1 . The MWCNT-COOH-MIP/CPE showed an enhanced electrochemical response, with sensitivity 7.9-fold greater than for a plain carbon paste electrode (CPE). Application of the sensor using river water samples resulted in recoveries between 96.1 and 99.5% and RSD <5% (n=3), demonstrating the reliability of this device.

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Biodegradation of the herbicide diuron by streptomycetes isolated from soil

Cited by 56 publications

References 32 publications

Rapid Mineralization of the Phenylurea Herbicide Diuron by Variovorax sp. Strain SRS16 in Pure Culture and within a Two-Member Consortium

Rapid Mineralization of the Phenylurea Herbicide Diuron by Variovorax sp. Strain SRS16 in Pure Culture and within a Two-Member Consortium

Bioaugmentation of Soil Contaminated with Azoxystrobin

Development of an Electrochemical Sensor Modified With MWCNT-Cooh and Mip for Detection of Diuron

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