Pseudomonas sp. ZXY-1, a newly isolated and highly efficient atrazine-degrading bacterium, and optimization of biodegradation using response surface methodology

Zhao, Xinyue; Wang, Li; Ma, Fang; Bai, Shunwen; Yang, Jixian; Qi, Shanshan

doi:10.1016/j.jes.2016.06.010

Cited by 56 publications

(22 citation statements)

References 26 publications

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“…Response surface and contour plots were generated to allow the understanding of the main factors, as well as the interactions of two factors, while maintaining other factors constant at the central point level (Arora et al ., ; Zhao et al ., ). The 3D response surface and the 2D contour plots are the graphical representations of the regression equation.…”

Section: Resultsmentioning

confidence: 97%

Isolation, characterisation and fermentation optimisation of glucansucrase‐producing Leuconostoc mesenteroides DRP105 from sauerkraut with improved preservation stability

Xing

Zhou

et al. 2017

Int J of Food Sci Tech

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A total of fifty-six strains of lactic acid bacteria isolated from Chinese sauerkraut juice from Shenyang were screened for glucansucrase production. Among them, strain DRP105 was detected to produce highest yield of glucansucrase in MRS broth, which was identified to be Leuconostoc mesenteroides. Based on Plackett-Burman Experiment, sucrose, sodium acetate and initial pH were found to be the most significant factors for glucansucrase production of L. mesenteroides DRP105. Afterwards, effects of the three main factors on glucansucrase activity were further investigated by central composite design, and the optimum composition was sucrose 35.74 g L À1 , sodium acetate 6.46 g L À1 and initial pH 5.90. Optimum results showed that glucansucrase activity was increased to 6.26 AE 0.09 U mL À1 in 24 h fermentation, 33.19% higher than before. Our study also suggested that Tween 80 and dextran have potential to improve glucansucrase stability at temperature (30°C) higher than enzyme storage temperature in crude fermented broth.Considering the culture conditions reported in previous studies, we set the main factors in this study as follows: initial pH of 4. 0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5 and 8.0; temperatures of 20, 25, 30, 35, 40 and 45°C; rotary speeds of 0, 50, 80, 100, 120, 150 and

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Section: Resultsmentioning

confidence: 97%

Isolation, characterisation and fermentation optimisation of glucansucrase‐producing Leuconostoc mesenteroides DRP105 from sauerkraut with improved preservation stability

Xing

Zhou

et al. 2017

Int J of Food Sci Tech

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“…A total of 24 soil samples from the sampling site were then taken to obtain representative composite soil samples. They were chilled at 4ºC during the transfer of the sample to the lab, and stored at -20ºC to carry out bacterial isolation and DNA [15][16]. The pH value of the medium was adjusted to 7.0, and the medium was autoclaved to sterilize at 121ºC for 15 min.…”

Section: Medium and Culture Conditionsmentioning

confidence: 99%

“…This procedure was replicated three times. The final enrichment cultures were transferred onto the benzene-containing agar plates [15][16].…”

Section: Medium and Culture Conditionsmentioning

confidence: 99%

“…The response surface is addressed as the fitted model in many industrial applications, due to the capability of the response which can then be graphed as a line (curve) for one interesting factor or a surface for two interesting factors. Often the RSM is used to identify the range of operating conditions that can lead to the optimum response and satisfy certain operating or process specifications [16]. RSM also may be used to identify new operating conditions that would improve product quality, while correlating among the response and the main quantitative factors.…”

Section: Design Of Experiments and Modelingmentioning

confidence: 99%

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Benzene Degradation by Free and Immobilized <i>Bacillus glycinifermantans</i> Strain GO-13T Using GO Sheets

Mohammadpour¹,

Shahriarinour²,

Yousefi³

2020

Pol. J. Environ. Stud.

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Petroleum hydrocarbon compounds are commonly known as soil and groundwater contaminants. Bacteria need to come in physical contact with these compounds to degrade them. A wide variety of hydrocarbon degradation can be found due to the affinity of a bacterial strain toward a particular hydrocarbon. Due to the similarity in the structure of most of the aromatic hydrocarbon pollutants, it is possible that the bacterial strain showing affinity toward one hydrocarbon reveals an affinity toward other related aromatic hydrocarbons. Whenever there is physical contact between cells and pollutants, biofilm formation and surfactant production can take place for increasing hydrocarbon bioavailability and biodegradation [1]. Volatile monoaromatic hydrocarbons of crude petroleum and petroleum products, which are commonly found together, are benzene, toluene, ethylbenzene, and xylene [BTEX]. These compounds are dangerous to human

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“…Another common herbicide, atrazine, is often used alone or in combination with other herbicides to control grass and broadleaf weeds in field crops [28,29]. Introduced into the market almost 50 years ago, atrazine now ranks as the second most heavily used pesticide in the world [30].…”

Section: Introductionmentioning

confidence: 99%

Trifluralin and Atrazine Sensitivity to Selected Cereal and Legume Crops

et al. 2020

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Soil-applied herbicides can persist in sufficient concentrations to affect the growth of crops in rotations. The sensitivity of wheat, barley, oat, lucerne and lentil to trifluralin and atrazine residues were investigated with three glasshouse experiments in 2018 and 2019. Each bioassay crop species was tested against different concentrations of trifluralin and atrazine in sandy soil using a full factorial design. Shoot and root parameters of the tested crop species were fitted in logistic equations against herbicide concentrations to calculate effective doses for 50% growth inhibition (ED50). Results revealed that both shoot and root parameters of all the test crop species were significantly affected by trifluralin and atrazine. Trifluralin delayed crop emergence at the lower concentrations examined, while higher concentrations prevented emergence entirely. Low concentrations of atrazine did not affect emergence but significantly reduced plant height, soil–plant analyses development (SPAD) index, shoot dry weight, root length, root dry weight and number of nodules of all the crop species. At high concentration, atrazine resulted in plant death. Legumes were found to be more sensitive than cereals when exposed to both trifluralin and atrazine treatments, with lucerne being the most sensitive to both herbicides, ED50 ranging from 0.01 to 0.07 mg/kg soil for trifluralin; and from 0.004 to 0.01 mg/kg for atrazine. Barley was the most tolerant species observed in terms of the two herbicides tested. Lucerne can be used to develop a simple but reliable bioassay technique to estimate herbicide residues in the soil so that a sound crop rotation strategy can be implemented.

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Pseudomonas sp. ZXY-1, a newly isolated and highly efficient atrazine-degrading bacterium, and optimization of biodegradation using response surface methodology

Cited by 56 publications

References 26 publications

Isolation, characterisation and fermentation optimisation of glucansucrase‐producing Leuconostoc mesenteroides DRP105 from sauerkraut with improved preservation stability

Isolation, characterisation and fermentation optimisation of glucansucrase‐producing Leuconostoc mesenteroides DRP105 from sauerkraut with improved preservation stability

Benzene Degradation by Free and Immobilized <i>Bacillus glycinifermantans</i> Strain GO-13T Using GO Sheets

Trifluralin and Atrazine Sensitivity to Selected Cereal and Legume Crops

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