Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels
The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of am...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Liu, Ying [verfasserIn] |
|---|
| Format: |
Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2015 |
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| Rechteinformationen: |
Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. |
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| Schlagwörter: |
Superoxide Dismutase - metabolism Microcystis - growth & development Reactive Oxygen Species - metabolism |
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| Übergeordnetes Werk: |
Enthalten in: Ecotoxicology and environmental safety - Amsterdam : Elsevier, 1977, 111(2015), Seite 138-145 |
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| Übergeordnetes Werk: |
volume:111 ; year:2015 ; pages:138-145 |
| Links: |
|---|
| DOI / URN: |
10.1016/j.ecoenv.2014.10.011 |
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| 520 | |a The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. | ||
| 540 | |a Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. | ||
| 650 | 4 | |a Malondialdehyde - metabolism | |
| 650 | 4 | |a Superoxide Dismutase - metabolism | |
| 650 | 4 | |a Microcystis - growth & development | |
| 650 | 4 | |a Microcystis - drug effects | |
| 650 | 4 | |a Microcystis - metabolism | |
| 650 | 4 | |a Antioxidants - metabolism | |
| 650 | 4 | |a Glutathione - metabolism | |
| 650 | 4 | |a Oxidoreductases - metabolism | |
| 650 | 4 | |a Amoxicillin - metabolism | |
| 650 | 4 | |a Nitrogen - metabolism | |
| 650 | 4 | |a Reactive Oxygen Species - metabolism | |
| 650 | 4 | |a Anti-Bacterial Agents - metabolism | |
| 650 | 4 | |a Water Pollutants, Chemical - metabolism | |
| 700 | 1 | |a Wang, Feng |4 oth | |
| 700 | 1 | |a Chen, Xiao |4 oth | |
| 700 | 1 | |a Zhang, Jian |4 oth | |
| 700 | 1 | |a Gao, Baoyu |4 oth | |
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10.1016/j.ecoenv.2014.10.011 doi PQ20160617 (DE-627)OLC1964311942 (DE-599)GBVOLC1964311942 (PRQ)c2159-463a46f73a21fbecaa7cacad00b240f93d9da6fe2cb82cf004bdadd4dc6f53340 (KEY)0029001720150000111000000138cellularresponsesandbiodegradationofamoxicillininm DE-627 ger DE-627 rakwb eng 610 570 DNB 44.13 bkl 44.00 bkl Liu, Ying verfasserin aut Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. Malondialdehyde - metabolism Superoxide Dismutase - metabolism Microcystis - growth & development Microcystis - drug effects Microcystis - metabolism Antioxidants - metabolism Glutathione - metabolism Oxidoreductases - metabolism Amoxicillin - metabolism Nitrogen - metabolism Reactive Oxygen Species - metabolism Anti-Bacterial Agents - metabolism Water Pollutants, Chemical - metabolism Wang, Feng oth Chen, Xiao oth Zhang, Jian oth Gao, Baoyu oth Enthalten in Ecotoxicology and environmental safety Amsterdam : Elsevier, 1977 111(2015), Seite 138-145 (DE-627)130055611 (DE-600)436536-7 (DE-576)015593118 0147-6513 nnns volume:111 year:2015 pages:138-145 http://dx.doi.org/10.1016/j.ecoenv.2014.10.011 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25450926 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_70 GBV_ILN_4219 44.13 AVZ 44.00 AVZ AR 111 2015 138-145 |
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10.1016/j.ecoenv.2014.10.011 doi PQ20160617 (DE-627)OLC1964311942 (DE-599)GBVOLC1964311942 (PRQ)c2159-463a46f73a21fbecaa7cacad00b240f93d9da6fe2cb82cf004bdadd4dc6f53340 (KEY)0029001720150000111000000138cellularresponsesandbiodegradationofamoxicillininm DE-627 ger DE-627 rakwb eng 610 570 DNB 44.13 bkl 44.00 bkl Liu, Ying verfasserin aut Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. Malondialdehyde - metabolism Superoxide Dismutase - metabolism Microcystis - growth & development Microcystis - drug effects Microcystis - metabolism Antioxidants - metabolism Glutathione - metabolism Oxidoreductases - metabolism Amoxicillin - metabolism Nitrogen - metabolism Reactive Oxygen Species - metabolism Anti-Bacterial Agents - metabolism Water Pollutants, Chemical - metabolism Wang, Feng oth Chen, Xiao oth Zhang, Jian oth Gao, Baoyu oth Enthalten in Ecotoxicology and environmental safety Amsterdam : Elsevier, 1977 111(2015), Seite 138-145 (DE-627)130055611 (DE-600)436536-7 (DE-576)015593118 0147-6513 nnns volume:111 year:2015 pages:138-145 http://dx.doi.org/10.1016/j.ecoenv.2014.10.011 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25450926 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_70 GBV_ILN_4219 44.13 AVZ 44.00 AVZ AR 111 2015 138-145 |
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10.1016/j.ecoenv.2014.10.011 doi PQ20160617 (DE-627)OLC1964311942 (DE-599)GBVOLC1964311942 (PRQ)c2159-463a46f73a21fbecaa7cacad00b240f93d9da6fe2cb82cf004bdadd4dc6f53340 (KEY)0029001720150000111000000138cellularresponsesandbiodegradationofamoxicillininm DE-627 ger DE-627 rakwb eng 610 570 DNB 44.13 bkl 44.00 bkl Liu, Ying verfasserin aut Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. Malondialdehyde - metabolism Superoxide Dismutase - metabolism Microcystis - growth & development Microcystis - drug effects Microcystis - metabolism Antioxidants - metabolism Glutathione - metabolism Oxidoreductases - metabolism Amoxicillin - metabolism Nitrogen - metabolism Reactive Oxygen Species - metabolism Anti-Bacterial Agents - metabolism Water Pollutants, Chemical - metabolism Wang, Feng oth Chen, Xiao oth Zhang, Jian oth Gao, Baoyu oth Enthalten in Ecotoxicology and environmental safety Amsterdam : Elsevier, 1977 111(2015), Seite 138-145 (DE-627)130055611 (DE-600)436536-7 (DE-576)015593118 0147-6513 nnns volume:111 year:2015 pages:138-145 http://dx.doi.org/10.1016/j.ecoenv.2014.10.011 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25450926 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_70 GBV_ILN_4219 44.13 AVZ 44.00 AVZ AR 111 2015 138-145 |
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10.1016/j.ecoenv.2014.10.011 doi PQ20160617 (DE-627)OLC1964311942 (DE-599)GBVOLC1964311942 (PRQ)c2159-463a46f73a21fbecaa7cacad00b240f93d9da6fe2cb82cf004bdadd4dc6f53340 (KEY)0029001720150000111000000138cellularresponsesandbiodegradationofamoxicillininm DE-627 ger DE-627 rakwb eng 610 570 DNB 44.13 bkl 44.00 bkl Liu, Ying verfasserin aut Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. Malondialdehyde - metabolism Superoxide Dismutase - metabolism Microcystis - growth & development Microcystis - drug effects Microcystis - metabolism Antioxidants - metabolism Glutathione - metabolism Oxidoreductases - metabolism Amoxicillin - metabolism Nitrogen - metabolism Reactive Oxygen Species - metabolism Anti-Bacterial Agents - metabolism Water Pollutants, Chemical - metabolism Wang, Feng oth Chen, Xiao oth Zhang, Jian oth Gao, Baoyu oth Enthalten in Ecotoxicology and environmental safety Amsterdam : Elsevier, 1977 111(2015), Seite 138-145 (DE-627)130055611 (DE-600)436536-7 (DE-576)015593118 0147-6513 nnns volume:111 year:2015 pages:138-145 http://dx.doi.org/10.1016/j.ecoenv.2014.10.011 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25450926 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_70 GBV_ILN_4219 44.13 AVZ 44.00 AVZ AR 111 2015 138-145 |
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10.1016/j.ecoenv.2014.10.011 doi PQ20160617 (DE-627)OLC1964311942 (DE-599)GBVOLC1964311942 (PRQ)c2159-463a46f73a21fbecaa7cacad00b240f93d9da6fe2cb82cf004bdadd4dc6f53340 (KEY)0029001720150000111000000138cellularresponsesandbiodegradationofamoxicillininm DE-627 ger DE-627 rakwb eng 610 570 DNB 44.13 bkl 44.00 bkl Liu, Ying verfasserin aut Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels 2015 Text txt rdacontent ohne Hilfsmittel zu benutzen n rdamedia Band nc rdacarrier The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. Nutzungsrecht: Copyright © 2014 Elsevier Inc. All rights reserved. Malondialdehyde - metabolism Superoxide Dismutase - metabolism Microcystis - growth & development Microcystis - drug effects Microcystis - metabolism Antioxidants - metabolism Glutathione - metabolism Oxidoreductases - metabolism Amoxicillin - metabolism Nitrogen - metabolism Reactive Oxygen Species - metabolism Anti-Bacterial Agents - metabolism Water Pollutants, Chemical - metabolism Wang, Feng oth Chen, Xiao oth Zhang, Jian oth Gao, Baoyu oth Enthalten in Ecotoxicology and environmental safety Amsterdam : Elsevier, 1977 111(2015), Seite 138-145 (DE-627)130055611 (DE-600)436536-7 (DE-576)015593118 0147-6513 nnns volume:111 year:2015 pages:138-145 http://dx.doi.org/10.1016/j.ecoenv.2014.10.011 Volltext http://www.ncbi.nlm.nih.gov/pubmed/25450926 GBV_USEFLAG_A SYSFLAG_A GBV_OLC SSG-OLC-UMW SSG-OLC-TEC SSG-OLC-PHA SSG-OLC-DE-84 GBV_ILN_21 GBV_ILN_70 GBV_ILN_4219 44.13 AVZ 44.00 AVZ AR 111 2015 138-145 |
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610 570 DNB 44.13 bkl 44.00 bkl Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels Malondialdehyde - metabolism Superoxide Dismutase - metabolism Microcystis - growth & development Microcystis - drug effects Microcystis - metabolism Antioxidants - metabolism Glutathione - metabolism Oxidoreductases - metabolism Amoxicillin - metabolism Nitrogen - metabolism Reactive Oxygen Species - metabolism Anti-Bacterial Agents - metabolism Water Pollutants, Chemical - metabolism |
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Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels |
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The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. |
| abstractGer |
The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. |
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The influence of nitrogen on the interactions between amoxicillin and Microcystis aeruginosa was investigated using a 7-day exposure test. Growth of M. aeruginosa was not significantly (p>0.05) affected by amoxicillin at the lowest nitrogen level of 0.05 mg L(-1), stimulated by 500 ng L(-1) of amoxicillin at a moderate nitrogen level of 0.5 mg L(-1) and enhanced by 200-500 ng L(-1) of amoxicillin at the highest nitrogen level of 5 mg L(-1). The generation of reactive oxygen species (ROS) and the synthesis of glutathione S-transferases (GST) and glutathione (GSH) were more sensitive to amoxicillin and were stimulated at all nitrogen levels. At the lowest nitrogen level of 0.05 mg L(-1), superoxide dismutase and peroxidase were not effective at eliminating amoxicillin-induced ROS, resulting in the highest malondialdehyde content in M. aeruginosa. The biodegradation of 18.5-30.5% of amoxicillin by M. aeruginosa was coupled to increasing GST activity and GSH content. Elevated nitrogen concentrations significantly enhanced (p<0.05) the stimulation effect of amoxicillin on the growth of M. aeruginosa, the antioxidant responses to amoxicillin and the biodegradation of amoxicillin in M. aeruginosa. The nitrogen-dependent hormesis effect of the coexisting amoxicillin contaminant on the M. aeruginosa bloom should be fully considered during the control of M. aeruginosa bloom. |
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Cellular responses and biodegradation of amoxicillin in Microcystis aeruginosa at different nitrogen levels |
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