Biotransformation of Direct Blue 1 by a moderately halophilic bacterium Marinobacter sp. strain HBRA and toxicity assessment of degraded metabolites

Prasad, Arun S.; Satyanarayana, V. S. V.; Rao, Kokati Venkata Bhaskara

doi:10.1016/j.jhazmat.2013.09.011

Cited by 56 publications

(22 citation statements)

References 29 publications

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“…This suggested that the azo group and naphthyl ring were decomposed into aromatics, which were first accumulated during decolorization and then were further degraded over an extended period of time. Based on the HPLC-MS analysis, four possible metabolites were identified: 4-hydrazinylnaphthalene-1-sulfonic acid, 4-hydroxynaphthalene-1-sulfonic acid, 4-aminonaphthalene-1-sulfonic acid, and naphthalene-1,2,4-triol ( Supplementary Figure S5B), with m/z values of 237.0, 223.0, 222.1, and 175.0, respectively (Arun et al, 2013;Adnan et al, 2015). Additionally, the activities of four possible key enzymes involved in dye decolorization were analyzed, as shown in Table 1.…”

Section: Proposed Arb Degradation Pathwaymentioning

confidence: 99%

Improving Azo Dye Decolorization Performance and Halotolerance of Pichia occidentalis A2 by Static Magnetic Field and Possible Mechanisms Through Comparative Transcriptome Analysis

Wang

Ning

et al. 2020

Front. Microbiol.

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A halotolerant yeast, Pichia occidentalis A2, was recently isolated that can decolorize various azo dyes. The azo dye decolorization performance of this strain was characterized, including the degradation pathway and detoxification effects of this yeast. Additionally, the effect of static magnetic field (SMF) on this decolorization process was investigated. Activities of key enzymes were analyzed to estimate the change of metabolic activity. Furthermore, possible mechanisms were analyzed through detecting differentially expressed genes between yeast A2 in the absence and presence of SMF. The results indicated that yeast A2 displayed the optimal decolorization performance when the concentrations (in g/L) of glucose, (NH 4) 2 SO 4 , yeast extract, and NaCl were 4.0, 1.0, 0.1, and ≤30.0, respectively. Meanwhile, the optimal rotation speed, temperature, and pH were 160 rpm, 30 • C, and 5.0, respectively. Acid Red B was decolorized and detoxified by yeast A2 through successive steps, including cleavage of the naphthalene-amidine bond, reductive deamination, oxidative deamination/desulfurization, open-loop of hydroxy-substituted naphthalene, and tricarboxylic acid cycle. The dye decolorization efficiency and halotolerance of yeast A2 were enhanced by 206.3 mT SMF. The activities of manganese peroxidase, and laccase were elevated 1.37-and 1.16-fold by 206.3 mT SMF, but lignin peroxidase activity showed little change. It was suggested from the transcriptome sequence that the enhanced halotolerance might be related to the upregulated genes encoding the enzymes or functional proteins related to intracellular synthesis and accumulation of glycerol.

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Section: Proposed Arb Degradation Pathwaymentioning

confidence: 99%

Improving Azo Dye Decolorization Performance and Halotolerance of Pichia occidentalis A2 by Static Magnetic Field and Possible Mechanisms Through Comparative Transcriptome Analysis

Wang

Ning

et al. 2020

Front. Microbiol.

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“…The degraded metabolites of SMX and RR-194 were extracted by ethyl acetate then dried and dissolved in 10 mL distilled water to obtain a final concentration of 50ppm. The phytotoxicity test was carried out by following the prescribed guidelines in the literature[39,40] with few modifications. Seeds of each crop type (10 no) were sterilized using 1-5 % sodium hypochlorite solution (15 min) followed by thorough washing with distilled water.They were then immersed for 60 min in the SMX, RR-194 aqueous solutions and in the samples subjected to photocatalytic degradation using 100 mL Erlenmeyer flasks containing the contaminants and their respective degradation products.…”

mentioning

confidence: 99%

Photocatalytic mineralization and degradation kinetics of sulphamethoxazole and reactive red 194 over silver-zirconium co-doped titanium dioxide: Reaction mechanisms and phytotoxicity assessment

Naraginti

Puma

2018

Ecotoxicology and Environmental Safety

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“…Under optimized treatment conditions, up to 96% decolorization of dye was achieved and A. cepa showed toxicity (root growth inhibition) in dye concentration dependent manner. Prasad et al (2013) used A. cepa test to evaluate the ability of halophilic bacterial strain to degrade the complex azo dye Direct Blue-1 (DB-1). Complete decolorization of DB-1 (100 mg/L) was achieved in 6 h at 37 °C, pH 8 and with 70 g/L NaCl.…”

Section: Textile Industrymentioning

confidence: 99%

Bioassays based on higher plants as excellent dosimeters for ecotoxicity monitoring: A review

Int¹,

Iqbal²

2019

Preprint

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All sorts of pollution on the planet can be traced back to development of industries and the most important among them is water pollution. Clean technologies, management practices and regular monitoring of effluents could be helpful to minimize the contamination of watersheds. Allium cepa (A. cepa) has been recognized as a promising genetic model to detect the toxicity of industrial wastewater, contaminated soil, river water, nuclear contamination and even for those systems which are considered non toxic. A. cepa is distinguished as a low cost test, easy to handle and sensitive to both in vivo and in vitro models. It offers the detection of damages in genetic material quantitatively and the results can be generalized for other biological and ecological systems. Moreover, the pollutants can be classified on the basis of this test present in industrial effluents and their mechanism of action on genetic material. This review focuses on the studies undertaken to evaluate the toxicity of industrial wastewater, contaminated river and soils.

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Biotransformation of Direct Blue 1 by a moderately halophilic bacterium Marinobacter sp. strain HBRA and toxicity assessment of degraded metabolites

Cited by 56 publications

References 29 publications

Improving Azo Dye Decolorization Performance and Halotolerance of Pichia occidentalis A2 by Static Magnetic Field and Possible Mechanisms Through Comparative Transcriptome Analysis

Improving Azo Dye Decolorization Performance and Halotolerance of Pichia occidentalis A2 by Static Magnetic Field and Possible Mechanisms Through Comparative Transcriptome Analysis

Photocatalytic mineralization and degradation kinetics of sulphamethoxazole and reactive red 194 over silver-zirconium co-doped titanium dioxide: Reaction mechanisms and phytotoxicity assessment

Bioassays based on higher plants as excellent dosimeters for ecotoxicity monitoring: A review

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