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Donoso-Piñol P, Briceño G, Evaristo JAM, Nogueira FCS, Leiva B, Lamilla C, Schalchli H, Diez MC. Metabolic Profiling and Comparative Proteomic Insight in Respect of Amidases during Iprodione Biodegradation. Microorganisms 2023; 11:2367. [PMID: 37894025 PMCID: PMC10608976 DOI: 10.3390/microorganisms11102367] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 09/11/2023] [Accepted: 09/18/2023] [Indexed: 10/29/2023] Open
Abstract
The fungicide iprodione (IPR) (3-(3,5-dichlorophenyl) N-isopropyl-2,4-dioxoimidazolidine-1-carboxamide) is a highly toxic compound. Although IPR has been restricted, it is still being applied in many places around the world, constituting an environmental risk. The biodegradation of IPR is an attractive option for reducing its residues. In this study, we isolated thirteen IPR-tolerant bacteria from a biopurification system designed to treat pesticides. A study of biodegradation using different strains was comparatively evaluated, and the best degradation rate of IPR was presented by Achromobacter sp. C1 with a half-life (T1/2) of 9 days. Based on a nano-LC-MS/MS analysis for the strains, proteins solely expressed in the IPR treatment were identified by highlighting the strain Achromobacter sp. C1, with 445 proteins primarily involved in the biosynthesis of secondary metabolites and microbial metabolism in diverse environments. Differentially expressed protein amidases were involved in six metabolic pathways. Interestingly, formamidase was inhibited while other cyclases, i.e., amidase and mandelamide hydrolase, were overexpressed, thereby minimizing the effect of IPR on the metabolism of strain C1. The dynamic changes in the protein profiles of bacteria that degrade IPR have been poorly studied; therefore, our results offer new insight into the metabolism of IPR-degrading microorganisms, with special attention paid to amidases.
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Affiliation(s)
- Pamela Donoso-Piñol
- Doctoral Program in Science of Natural Resources, University of La Frontera, Temuco 4780000, Chile; (P.D.-P.); (B.L.)
| | - Gabriela Briceño
- Department of Chemistry Science and Natural Resources, University of La Frontera, Temuco 4780000, Chile
- Biotechnological Research Centre Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco 4780000, Chile; (C.L.); (H.S.)
| | - Joseph A. M. Evaristo
- Laboratory of Proteomics, LADETEC, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 22775-000, Brazil; (J.A.M.E.); (F.C.S.N.)
| | - Fábio C. S. Nogueira
- Laboratory of Proteomics, LADETEC, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro 22775-000, Brazil; (J.A.M.E.); (F.C.S.N.)
| | - Barbara Leiva
- Doctoral Program in Science of Natural Resources, University of La Frontera, Temuco 4780000, Chile; (P.D.-P.); (B.L.)
- Biotechnological Research Centre Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco 4780000, Chile; (C.L.); (H.S.)
| | - Claudio Lamilla
- Biotechnological Research Centre Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco 4780000, Chile; (C.L.); (H.S.)
| | - Heidi Schalchli
- Biotechnological Research Centre Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco 4780000, Chile; (C.L.); (H.S.)
| | - María Cristina Diez
- Biotechnological Research Centre Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco 4780000, Chile; (C.L.); (H.S.)
- Department of Chemical Engineering, University of La Frontera, Temuco 4780000, Chile
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Pan H, Zhu B, Li J, Zhou Z, Bu W, Dai Y, Lu X, Liu H, Tian Y. Degradation of iprodione by a novel strain Azospirillum sp. A1-3 isolated from Tibet. Front Microbiol 2023; 13:1057030. [PMID: 36699606 PMCID: PMC9869045 DOI: 10.3389/fmicb.2022.1057030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 12/20/2022] [Indexed: 01/12/2023] Open
Abstract
A bacterial strain A1-3 with iprodione-degrading capabilities was isolated from the soil for vegetable growing under greenhouses at Lhasa, Tibet. Based on phenotypic, phylogenetic, and genotypic data, strain A1-3 was considered to represent a novel species of genus Azospirillum. It was able to use iprodione as the sole source of carbon and energy for growth, 27.96 mg/L (50.80%) iprodione was reduced within 108 h at 25°C. During the degradation of iprodione by Azospirillum sp. A1-3, iprodione was firstly degraded to N-(3,5-dichlorophenyl)-2,4-dioxoimidazolidine, and then to (3,5-dichlorophenylurea) acetic acid. However, (3,5-dichlorophenylurea) acetic acid cannot be degraded to 3,5-dichloroaniline by Azospirillum sp. A1-3. A ipaH gene which has a highly similarity (98.72-99.92%) with other previously reported ipaH genes, was presented in Azospirillum sp. A1-3. Azospirillum novel strain with the ability of iprodione degradation associated with nitrogen fixation has never been reported to date, and Azospirillum sp. A1-3 might be a promising candidate for application in the bioremediation of iprodione-contaminated environments.
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Affiliation(s)
- Hu Pan
- Institute of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, China,College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Beike Zhu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Jin Li
- Department of Life Sciences, Changzhi University, Changzhi, China
| | - Ziqiong Zhou
- School of Food Science, Tibet Institute of Agriculture and Animal Husbandry, Nyingchi, China
| | - Wenbin Bu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Yanna Dai
- Institute of Agricultural Product Quality Standard and Testing Research, Tibet Academy of Agricultural and Animal Husbandry Sciences, Lhasa, China
| | - Xiangyang Lu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China
| | - Huhu Liu
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China,*Correspondence: Huhu Liu, ✉
| | - Yun Tian
- College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha, China,Yun Tian, ✉
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Zhang M, Jiang W, Gao S, Zhu Q, Ke Z, Jiang M, Qiu J, Hong Q. Degradation of dimethachlon by a newly isolated bacterium Paenarthrobacter sp. strain JH-1 relieves its toxicity against Chlorella ellipsoidea. ENVIRONMENTAL RESEARCH 2022; 208:112706. [PMID: 35031339 DOI: 10.1016/j.envres.2022.112706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 12/21/2021] [Accepted: 01/06/2022] [Indexed: 06/14/2023]
Abstract
Dimethachlon, a broad-spectrum dicarboximide fungicide, poses a hazard to the safety of human and ecosystem due to its residue in the environment. A high-efficient dimethachlon degrading bacteria JH-1 belonging to Paenarthrobacter sp. was isolated and characterized. Strain JH-1 can utilize high concentration of dimethachlon as sole carbon source for growth and degrade 98.53% of 300 mg·L-1 dimethachlon within 72 h. Crude enzyme of strain JH-1 could degrade 99.76% of 100 mg·L-1 dimethachlon within 2 h. The optimum degradation condition of dimethachlon by strain JH-1 was at 35 °C and pH 7.0. Dimethachlon was degraded in Paenarthrobacter sp. JH-1 as following: it was firstly converted to 4-(3,5-dichloroanilino)-4-oxobutanoic acid and then subjected to the hydrolysis to 3,5-dichloroaniline and succinic acid, the latter was further degraded. Dimethachlon inhibited the growth of Chlorella ellipsoidea, while Paenarthrobacter sp. JH-1 could degrade dimethachlon to relieve its toxicity. This work facilitates our knowledge of the degradation mechanism of dimethachlon and offers potential resource of microbial strains for the bioremediation of dimethachlon-contaminated environments in the future.
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Affiliation(s)
- Mingliang Zhang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China
| | - Wankui Jiang
- State Key Laboratory of Materials-Oriented Chemical Engineering, College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Puzhu South Road 30#, 211800, Nanjing, PR China
| | - Siyuan Gao
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China
| | - Qian Zhu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China
| | - Zhijian Ke
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China
| | - Mingli Jiang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China
| | - Jiguo Qiu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China
| | - Qing Hong
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, PR China.
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Asamba MN, Mugendi EN, Oshule PS, Essuman S, Chimbevo LM, Atego NA. Molecular characterization of chlorpyrifos degrading bacteria isolated from contaminated dairy farm soils in Nakuru County, Kenya. Heliyon 2022; 8:e09176. [PMID: 35846483 PMCID: PMC9280583 DOI: 10.1016/j.heliyon.2022.e09176] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 01/18/2022] [Accepted: 03/17/2022] [Indexed: 11/16/2022] Open
Abstract
Chlorpyrifos (CP) is an organophosphate widely used as an insecticide and acaricide. Extensive application of CP contaminates ecosystems, polluting the environment and food products, creating health complications to humans due to its neurotoxicity. The study evaluated CP bioremediation by bacteria isolated from dairy farm soils in Nakuru County, Kenya, through enrichment culture technique. The growth response of the bacteria and degradation of chlorpyrifos was monitored every five days using UV-VIS Spectrophotometer (600nm). Enrichment culture technique led to the isolation of eighteen (MA1-MA18) potential CP degraders belonging to the genera Pseudomonas, Stenotrophomonas, Bacillus, Alicaligenes, and Achromobacter. The efficacy of four (4) strains was further investigated using Gas Chromatography-Mass Spectrometry (GC-MS) analysis. The results showed that all four strains significantly degraded chlorpyrifos in Minimum Salt Medium (MSM): Lysinibacillus sp.HBUM206408 (87.16 %), Stenotrophomonas maltophilia (82.04 %), Pseudomonas putida (89.52 %), and Achromobacter insuavis (91.08 %) within 16 days, producing 2-Hydroxy-3, 5, 6-trichloropyridine (TCP) as the main metabolite. Therefore, these strains can be used to degrade chlorpyrifos in contaminated soil. There is a need for further studies to determine the possible mechanisms and other metabolites of chlorpyrifos degradation by the isolates obtained in the study. Besides, future studies should explore the efficacy and survival of the organisms in the contaminated environment.
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Asamba MN, Mugendi EN, Oshule PS, Essuman S, Chimbevo LM, Atego NA. Molecular characterization of chlorpyrifos degrading bacteria isolated from contaminated dairy farm soils in Nakuru County, Kenya. Heliyon 2022; 8:e09176. [PMID: 35846483 DOI: 10.2139/ssrn.3940828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 01/18/2022] [Accepted: 03/17/2022] [Indexed: 05/28/2023] Open
Abstract
Chlorpyrifos (CP) is an organophosphate widely used as an insecticide and acaricide. Extensive application of CP contaminates ecosystems, polluting the environment and food products, creating health complications to humans due to its neurotoxicity. The study evaluated CP bioremediation by bacteria isolated from dairy farm soils in Nakuru County, Kenya, through enrichment culture technique. The growth response of the bacteria and degradation of chlorpyrifos was monitored every five days using UV-VIS Spectrophotometer (600nm). Enrichment culture technique led to the isolation of eighteen (MA1-MA18) potential CP degraders belonging to the genera Pseudomonas, Stenotrophomonas, Bacillus, Alicaligenes, and Achromobacter. The efficacy of four (4) strains was further investigated using Gas Chromatography-Mass Spectrometry (GC-MS) analysis. The results showed that all four strains significantly degraded chlorpyrifos in Minimum Salt Medium (MSM): Lysinibacillus sp.HBUM206408 (87.16 %), Stenotrophomonas maltophilia (82.04 %), Pseudomonas putida (89.52 %), and Achromobacter insuavis (91.08 %) within 16 days, producing 2-Hydroxy-3, 5, 6-trichloropyridine (TCP) as the main metabolite. Therefore, these strains can be used to degrade chlorpyrifos in contaminated soil. There is a need for further studies to determine the possible mechanisms and other metabolites of chlorpyrifos degradation by the isolates obtained in the study. Besides, future studies should explore the efficacy and survival of the organisms in the contaminated environment.
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Affiliation(s)
- Micah Nyabiba Asamba
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, Nairobi, Kenya
| | - Ezekiel Njeru Mugendi
- Department of Biochemistry, Microbiology and Biotechnology, Kenyatta University, Nairobi, Kenya
| | - Paul Sifuna Oshule
- Department of Medical Biochemistry, Mount Kenya University, Thika, Kenya
| | - Suliman Essuman
- Department of Medical Microbiology, Mount Kenya University, Thika, Kenya
| | - Lenny Mwagandi Chimbevo
- Department Pure and Applied Sciences, School of Applied and Health Sciences, Technical University of Mombasa, Mombasa, Kenya
| | - Norbert Adum Atego
- Department Pure and Applied Sciences, School of Applied and Health Sciences, Technical University of Mombasa, Mombasa, Kenya
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Zhang C, Wu X, Wu Y, Li J, An H, Zhang T. Enhancement of dicarboximide fungicide degradation by two bacterial cocultures of Providencia stuartii JD and Brevundimonas naejangsanensis J3. JOURNAL OF HAZARDOUS MATERIALS 2021; 403:123888. [PMID: 33264954 DOI: 10.1016/j.jhazmat.2020.123888] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/13/2020] [Accepted: 08/22/2020] [Indexed: 06/12/2023]
Abstract
Bioremediation is commonly conducted by microbial consortia rather than individual species in natural environments. Biodegradation of dicarboximide fungicides in brunisolic soil were significantly enhanced by two bacterial cocultures of Providencia stuartii JD and Brevundimonas naejangsanensis J3. The cocultures degraded 98.42 %, 95.44 %, and 96.81 % of 50 mg/L dimethachlon, iprodione, and procymidone in liquid culture within 6 d respectively, whose efficiency was 1.23 and 1.26, 1.25 and 1.23, and 1.24 and 1.24 times of strains JD and J3, respectively. The cocultures could effectively degrade dimethachlon, iprodione and procymidone to simple products. Moreover, the cocultures immobilized in a charcoal-alginate-chitosan carrier obviously surpassed free cocultures in terms of degradability, stability and reusability. In the field brunisolic soils treated by immobilized cocultures, 96.74 % of 20.25 kg a.i./ha dimethachlon, 95.02 % of 7.50 kg a.i./ha iprodione and 96.27 % of 7.50 kg a.i./ha procymidone were degraded after 7 d, respectively. Moreover, the lower half-lifes (1.53, 1.59 and 1.57 d) by immobilized cocultures were observed, as compared to free cocultures (3.60, 4.03 and 3.92 d) and natural dissipation (21.33, 20.51 and 20.09 d). This study highlights that strains JD and J3 have significant synergetic degradation advantages in rapid bioremediation of dicarboximide fungicide contamination sites.
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Affiliation(s)
- Cheng Zhang
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, College of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China
| | - Xiaomao Wu
- Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China.
| | - Yanyou Wu
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, College of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China.
| | - Jiaohong Li
- Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Huaming An
- Department of Plant Protection, Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, Guizhou Engineering Research Center of Fruit Crops, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Tao Zhang
- Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education, College of Agricultural Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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Mavriou Z, Alexandropoulou I, Melidis P, Karpouzas DG, Ntougias S. Biotreatment and bacterial succession in an upflow immobilized cell bioreactor fed with fludioxonil wastewater. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:3774-3786. [PMID: 32418094 DOI: 10.1007/s11356-020-09231-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 05/11/2020] [Indexed: 06/11/2023]
Abstract
The large quantities and the persistent nature of fungicide wastewaters have increased the efforts towards a sustainable technological solution. In this context, fludioxonil-contaminated wastewater was treated in an upflow immobilized cell bioreactor, resulting in chemical oxygen demand (COD) removal efficiency even higher than 80%, whereas the electrical conductivity (EC) of the effluent was gradually increased. Organic-F was mineralized by 94.0 ± 5.2%, which was in accordance with the high fludioxonil removal efficiency (95.4 ± 4.0%). In addition, effluent total Kjeldahl nitrogen (TKN) concentration reduced significantly during bioprocessing. A strong relationship among COD removal, TKN/total nitrogen removal, and effluent EC increase (p < 0.01) was identified. Despite the adequate aeration provided, effluent nitrite and nitrate concentrations were negligible. Illumina sequencing revealed a reduction in the relative abundances of Betaproteobacteria, Chloroflexi, Planctomycetes, and Firmicutes and an increase in the proportion of Alphaproteobacteria and Actinobacteria. A shift in bacterial communities occurred during fludioxonil treatment, resulting in the significant increase of the relative abundances of Empedobacter, Sphingopyxis, and Rhodopseudomonas (from 0.67 ± 0.13% at the start-up to 34.34 ± 1.60% at the end of biotreatment). In conclusion, the immobilized cell bioreactor permitted the proliferation of specialized activated sludge microbiota with an active role in the depuration of postharvest fungicides.
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Affiliation(s)
- Zografina Mavriou
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67132, Xanthi, Greece
| | - Ioanna Alexandropoulou
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67132, Xanthi, Greece
| | - Paraschos Melidis
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67132, Xanthi, Greece
| | - Dimitrios G Karpouzas
- Laboratory of Plant and Environmental Biotechnology, Department of Biochemistry and Biotechnology, University of Thessaly, Viopolis, 41500, Larissa, Greece
| | - Spyridon Ntougias
- Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering, Democritus University of Thrace, Vas. Sofias 12, 67132, Xanthi, Greece.
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Zhang M, Ren Y, Jiang W, Wu C, Zhou Y, Wang H, Ke Z, Gao Q, Liu X, Qiu J, Hong Q. Comparative genomic analysis of iprodione-degrading Paenarthrobacter strains reveals the iprodione catabolic molecular mechanism in Paenarthrobacter sp. strain YJN-5. Environ Microbiol 2020; 23:1079-1095. [PMID: 33169936 DOI: 10.1111/1462-2920.15308] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 11/05/2020] [Accepted: 11/06/2020] [Indexed: 12/16/2022]
Abstract
Degradation of the fungicide iprodione by the Paenarthrobacter sp. strain YJN-5 is initiated via hydrolysis of its N1 amide bond to form N-(3,5-dichlorophenyl)-2,4-dioxoimidazolidine. In this study, another iprodione-degrading strain, Paenarthrobacter sp. YJN-D, which harbours the same metabolic pathway as strain YJN-5 was isolated and characterized. The genes that encode the conserved iprodione catabolic pathway were identified based on comparative analysis of the genomes of the two iprodione-degrading Paenarthrobacter sp. and subsequent experimental validation. These genes include an amidase gene, ipaH (previously reported in AEM e01150-18); a deacetylase gene, ddaH, which is responsible for hydantoin ring cleavage of N-(3,5-dichlorophenyl)-2,4-dioxoimidazolidine, and a hydrolase gene, duaH, which is responsible for cleavage of the urea side chain of (3,5-dichlorophenylurea)acetic acid, thus yielding 3,5-dichloroaniline as the end product. These iprodione-catabolic genes are distributed on three plasmids in strain YJN-5 and are highly conserved between the two iprodione-degrading Paenarthrobacter strains. However, only the ipaH gene is flanked by a mobile genetic element. Two iprodione degradation cassettes bearing ipaH-ddaH-duaH were constructed and expressed in strains Pseudomonas putida KT2440 and Bacillus subtilis SCK6 respectively. Our findings enhance the current understanding of the microbial degradation mechanism of iprodione.
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Affiliation(s)
- Mingliang Zhang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Yijun Ren
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Wankui Jiang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Chenglong Wu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Yidong Zhou
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Hui Wang
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Zhijian Ke
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Qinqin Gao
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Xiaoan Liu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Jiguo Qiu
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Qing Hong
- Key Laboratory of Agricultural Environmental Microbiology, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
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Briceño G, Lamilla C, Leiva B, Levio M, Donoso-Piñol P, Schalchli H, Gallardo F, Diez MC. Pesticide-tolerant bacteria isolated from a biopurification system to remove commonly used pesticides to protect water resources. PLoS One 2020; 15:e0234865. [PMID: 32598366 PMCID: PMC7324069 DOI: 10.1371/journal.pone.0234865] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 06/03/2020] [Indexed: 12/03/2022] Open
Abstract
In this study, we selected and characterized different pesticide-tolerant bacteria isolated from a biomixture of a biopurification system that had received continuous applications of a pesticides mixture. The amplicon analysis of biomixture reported that the phyla Proteobacteria, Firmicutes, Bacteroidetes and Actinobacteria were predominant. Six strains grew in the presence of chlorpyrifos and iprodione. Biochemical characterization showed that all isolates were positive for esterase, acid phosphatase, among others, and they were identified as Pseudomonas, Rhodococcus and Achromobacter based on molecular and proteomic analysis. Bacterial growth decreased as both pesticide concentrations increased from 10 to 100 mg L-1 in liquid culture. The Achromobacter sp. strain C1 showed the best chlorpyrifos removal rate of 0.072–0.147 d-1 a half-life of 4.7–9.7 d and a maximum metabolite concentration of 2.10 mg L-1 at 120 h. On the other hand, Pseudomonas sp. strain C9 showed the highest iprodione removal rate of 0.100–0.193 d-1 a half-life of 4–7 d and maximum metabolite concentration of 0.95 mg L-1 at 48 h. The Achromobacter and Pseudomonas strains showed a good potential as chlorpyrifos and iprodione-degrading bacteria.
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Affiliation(s)
- Gabriela Briceño
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
| | - Claudio Lamilla
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
| | - Bárbara Leiva
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
| | - Marcela Levio
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
| | - Pamela Donoso-Piñol
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
| | - Heidi Schalchli
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
| | - Felipe Gallardo
- Chemical Sciences and Natural Resource Department, University of La Frontera, Temuco, Chile
| | - María Cristina Diez
- Biotechnological Research Center Applied to the Environment (CIBAMA-BIOREN), University of La Frontera, Temuco, Chile
- Chemical Engineering Department, University of La Frontera, Temuco, Chile
- * E-mail:
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Zhang C, Li J, An H, Wu X, Wu Y, Long Y, Li R, Xing D. Enhanced elimination of dimethachlon from soils using a novel strain Brevundimonas naejangsanensis J3. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 255:109848. [PMID: 31756580 DOI: 10.1016/j.jenvman.2019.109848] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 10/08/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
Dimethachlon is a hazardous xenobiotic which poses a potential risk on the ecosystem and human health after foliar spray for mitigating fungal diseases of crops. A novel dimethachlon-degrading strain was isolated and identified as Brevundimonas naejangsanensis J3. Free cells and enzymes of this strain could rapidly eliminate 75 mg/L dimethachlon in liquid medium, especially the latter (>90% of degradation efficiency). Strain J3 completely metabolized dimethachlon by an ideally transformed pathway. Immobilization cells and enzymes exhibited better stability and adaptability for the repeated use, as compared with free cells and enzymes. In laboratory, 68.03 and 65.13%, or 82.67 and 95.41% of dimethachlon were eliminated from non-sterile soils by free or immobilized cells and enzymes within 7 d, respectively. Under the field condition, 95.78 and 98.01% of 20.250 kg a.i./ha dimethachlon wettable powder from soils were degraded by immobilized cells and enzymes in 9 d respectively, which were significant higher than the degradation efficiencies of free cells and enzymes (78.81 and 67.25%). This study highlights immobilized cells and enzymes from strain J3 can be applicable for bioremediating dimethachlon-contaminated soils.
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Affiliation(s)
- Cheng Zhang
- College of Agricultural Equipment and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China; Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China; Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China
| | - Jiaohong Li
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Huaming An
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Xiaomao Wu
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China.
| | - Yanyou Wu
- Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, Guizhou, 550081, China.
| | - Youhua Long
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Rongyu Li
- Institute of Crop Protection, Research Center for Engineering Technology of Kiwifruit, College of Agriculture, Guizhou University, Guiyang, Guizhou, 550025, China
| | - Deke Xing
- College of Agricultural Equipment and Engineering, Jiangsu University, Zhenjiang, Jiangsu, 212013, China
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An Amidase Gene, ipaH, Is Responsible for the Initial Step in the Iprodione Degradation Pathway of Paenarthrobacter sp. Strain YJN-5. Appl Environ Microbiol 2018; 84:AEM.01150-18. [PMID: 30054359 DOI: 10.1128/aem.01150-18] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2018] [Accepted: 07/20/2018] [Indexed: 11/20/2022] Open
Abstract
Iprodione [3-(3,5-dichlorophenyl) N-isopropyl-2,4-dioxoimidazolidine-1-carboxamide] is a highly effective broad-spectrum dicarboxamide fungicide. Several bacteria with iprodione-degrading capabilities have been reported; however, the enzymes and genes involved in this process have not been characterized. In this study, an iprodione-degrading strain, Paenarthrobacter sp. strain YJN-5, was isolated and characterized. Strain YJN-5 degraded iprodione through the typical pathway, with hydrolysis of its N-1 amide bond to N-(3,5-dichlorophenyl)-2,4-dioxoimidazolidine as the initial step. The ipaH gene, encoding a novel amidase responsible for this step, was cloned from strain YJN-5 by the shotgun method. IpaH shares the highest similarity (40%) with an indoleacetamide hydrolase (IAHH) from Bradyrhizobium diazoefficiens USDA 110. IpaH displayed maximal enzymatic activity at 35°C and pH 7.5, and it was not a metalloamidase. The kcat and Km of IpaH against iprodione were 22.42 s-1 and 7.33 μM, respectively, and the catalytic efficiency value (kcat/Km ) was 3.09 μM-1 s-1 IpaH has a Ser-Ser-Lys motif, which is conserved among members of the amidase signature family. The replacement of Lys82, Ser157, and Ser181 with alanine in IpaH led to the complete loss of enzymatic activity. Furthermore, strain YJN-5M lost the ability to degrade iprodione, suggesting that ipaH is the only gene responsible for the initial iprodione degradation step. The ipaH gene could also be amplified from another previously reported iprodione-degrading strain, Microbacterium sp. strain YJN-G. The sequence similarity between the two IpaHs at the amino acid level was 98%, indicating that conservation of IpaH exists in different strains.IMPORTANCE Iprodione is a widely used dicarboxamide fungicide, and its residue has been frequently detected in the environment. The U.S. Environmental Protection Agency has classified iprodione as moderately toxic to small animals and a probable carcinogen to humans. Bacterial degradation of iprodione has been widely investigated. Previous studies demonstrate that hydrolysis of its N-1 amide bond is the initial step in the typical bacterial degradation pathway of iprodione; however, enzymes or genes involved in iprodione degradation have yet to be reported. In this study, a novel ipaH gene encoding an amidase responsible for the initial degradation step of iprodione in Paenarthrobacter sp. strain YJN-5 was cloned. In addition, the characteristics and key amino acid sites of IpaH were investigated. These findings enhance our understanding of the microbial degradation mechanism of iprodione.
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