The survival and removal mechanism of Sphingobacterium changzhouense TC931 under tetracycline stress and its’ ecological safety after application

Tan, Zewen; Chen, Jiacheng; Liu, Yiling; Chen, Lian; Xu, Yuqing; Zou, Yixuan; Li, Yongtao; Gong, Beini

doi:10.1016/j.biortech.2021.125067

Cited by 44 publications

(13 citation statements)

References 51 publications

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“…Strain M503 was isolated as a TC-degrading fungus species and could use additional carbon sources to degrade a high concentration of TC. These findings were consistent with those of previous studies [ 35 , 46 ], and potassium acetate is a better choice than peptone for strain M503. Given their complex molecular structure, TCs are regarded as the sole carbon source for growth of only few strains, e.g., strain of Pseudomonas sp.…”

Section: Discussionsupporting

confidence: 93%

“…The putative degradation pathways of TC by strain M503 showed that huge differences existed in the metabolism of fungi and bacteria. Although, compound 415 and ISO-TC are detected by a few studies on TC degradation by bacteria such as S. maltophilia DT1 and S. Changzhouense TC931 [ 46 ], other products, such as compounds 408 and 369, were rarely identified. The different degradation products between strain M503 and bacteria could be ascribed to the diverse degrading enzymes or metabolic pathways, which needed to be further studied.…”

Section: Discussionmentioning

confidence: 99%

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Biodegradation of Tetracycline Antibiotics by the Yeast Strain Cutaneotrichosporon dermatis M503

Tan

Kong

et al. 2022

Microorganisms

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In this study, the Cutaneotrichosporon dermatis strain M503 was isolated and could efficiently degrade tetracycline, doxycycline, and chlorotetracyline. The characteristics of tetracycline degradation were investigated under a broad range of cultural conditions. Response surface methodology (RSM) predicted that the highest degradation rate of tetracycline could be obtained under the following conditions: 39.69 °C, pH of 8.79, and inoculum dose of 4.0% (v/v, ~3.5 × 106 cells/mL in the medium). In accordance with the five identified degradation products of tetracycline, two putative degradation pathways, which included the shedding of methyl and amino groups, were proposed. Moreover, the well diffusion method showed that the strain of M503 decreases the antibacterial potency of tetracycline, doxycycline, and chlorotetracycline. These findings proposed a putative mechanism of tetracycline degradation by a fungus strain and contributed to the estimation of the fate of tetracycline in the aquatic environment.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Biodegradation of Tetracycline Antibiotics by the Yeast Strain Cutaneotrichosporon dermatis M503

Tan

Kong

et al. 2022

Microorganisms

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“…Based on the phenomenon observed in our study, it was hypothesized that the genes (K14338) coding for cytochrome P450/NADPH-cytochrome P450 reductase was conducive to the formation of the hydroxylated products. As one of the most dominant strains, Variovorax was the host-associated microbe for K14388, and its ability to hydroxylate the organic pollutants has been well documented in a previous study . Overall, these findings further reinforced the fact that the attenuation of TPHP, EHDPP, and BEHPP was attributed to the extrinsic contribution of strains in rhizosphere microbiome.…”

Section: Resultssupporting

confidence: 70%

“…As one of the most dominant strains, Variovorax was the hostassociated microbe for K14388, and its ability to hydroxylate the organic pollutants has been well documented in a previous study. 42 Overall, these findings further reinforced the fact that the attenuation of TPHP, EHDPP, and BEHPP was attributed to the extrinsic contribution of strains in rhizosphere microbiome.…”

Section: Mechanism Revealed By Microbial Metagenomic Analysissupporting

confidence: 54%

Biotransformation of Organophosphate Esters by Rice and Rhizosphere Microbiome: Multiple Metabolic Pathways, Mechanism, and Toxicity Assessment

Zhang

et al. 2023

Environ. Sci. Technol.

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The biotransformation behavior and toxicity of organophosphate esters (OPEs) in rice and rhizosphere microbiomes were comprehensively studied by hydroponic experiments. OPEs with lower hydrophobicity were liable to be translocated acropetally, and rhizosphere microbiome could reduce the uptake and translocation of OPEs in rice tissues. New metabolites were successfully identified in rice and rhizosphere microbiome, including hydrolysis, hydroxylated, methylated, and glutathione-, glucuronide-, and sulfate-conjugated products. Rhizobacteria and plants could cooperate to form a complex ecological interaction web for OPE elimination. Furthermore, active members of the rhizosphere microbiome during OPE degradation were revealed and the metagenomic analysis indicated that most of these active populations contained OPE-degrading genes. The results of metabolomics analyses for phytotoxicity assessment implied that several key function metabolic pathways of the rice plant were found perturbed by metabolites, such as diphenyl phosphate and monophenyl phosphate. In addition, the involved metabolism mechanisms, such as the carbohydrate metabolism, amino acid metabolism and synthesis, and nucleotide metabolism in Escherichia coli, were significantly altered after exposure to the products mixture of OPEs generated by rhizosphere microbiome. This work for the first time gives a comprehensive understanding of the entire metabolism of OPEs in plants and associated microbiome, and provides support for the ongoing risk assessment of emerging contaminants and, most critically, their transformation products.

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“…Similarly, PVC-MPs after aging treatment were termed PVC-10%, PVC-50%, and PVC-90%, respectively. The aged PS-MPs and PVC-MPs were employed to adsorb a broad-spectrum antibiotic TC, which has been extensively applied in the medical and veterinary field and frequently detected in various environmental matrices (e.g., groundwater, sediment, and soil). , For comparison, the adsorption of TC on pristine MPs was also determined. Detailed information for the adsorption experiments is given in Text S5.…”

Section: Methodsmentioning

confidence: 99%

Photoaging of Typical Microplastics as Affected by Air Humidity: Mechanistic Insights into the Important Role of Water Molecules

Wang

Liang

Bai

et al. 2023

Environ. Sci. Technol.

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Recent studies showed that land is the most important sink for microplastics (MPs); however, limited information is available on the photoaging processes of land surface MPs that are exposed to the air. Herein, this study developed two in situ spectroscopic methods to systematically explore the effect of air humidity on MP photoaging using a microscope of Fourier transform infrared spectroscopy and a laser Raman microscope, which were equipped with a humidity control system. Polyethylene microplastics, polystyrene microplastics, and poly(vinyl chloride) microplastics (PVC-MPs) were used as model MPs. Our results showed that relative humidity (RH) could significantly influence the MP surface oxygen-containing moieties generated from photo-oxidation, especially for PVC-MPs. As the RH level varied from 10 to 90%, a decrease in the photogenerated carbonyl group and an increase in the hydroxyl group were observed. This could be attributed to the involvement of water molecules in the production of hydroxyl groups, which subsequently inhibited carbonyl generation. Moreover, the adsorption of coexisting contaminants (i.e., tetracycline) on photoaged MPs exhibited strong RH dependence, which could be assigned to the varied hydrogen bonding between tetracycline carbonyls and aged MP surface hydroxyls. This study reveals a ubiquitous but previously overlooked MP aging route, which may account for the changed MP surface physiochemical properties under solar irradiation.

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The survival and removal mechanism of Sphingobacterium changzhouense TC931 under tetracycline stress and its’ ecological safety after application

Cited by 44 publications

References 51 publications

Biodegradation of Tetracycline Antibiotics by the Yeast Strain Cutaneotrichosporon dermatis M503

Biodegradation of Tetracycline Antibiotics by the Yeast Strain Cutaneotrichosporon dermatis M503

Biotransformation of Organophosphate Esters by Rice and Rhizosphere Microbiome: Multiple Metabolic Pathways, Mechanism, and Toxicity Assessment

Photoaging of Typical Microplastics as Affected by Air Humidity: Mechanistic Insights into the Important Role of Water Molecules

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