1
|
Dang B, Gao H, Jia W, Zhang Y, Xu Z, Han D, Yang J, Huang Y, Chen Z, Wang Y, Duan Y, Yuan R, Qiao Y, Yu H, Jin P, Ai H, Huang W. Degradation of myosmine by a novel bacterial strain Sphingopyxis sp. J-6 and its degradation pathways. JOURNAL OF HAZARDOUS MATERIALS 2025; 486:136996. [PMID: 39724711 DOI: 10.1016/j.jhazmat.2024.136996] [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: 10/21/2024] [Revised: 12/09/2024] [Accepted: 12/23/2024] [Indexed: 12/28/2024]
Abstract
This study isolated a myosmine-degrading bacterial strain J-6 from tobacco-growing soil. The identification of this strain revealed it to be a new species within the genus Sphingopyxis. Analysis of the myosmine degradation products by HPLC, preparative HPLC, and UHPLC-MS/MS identified 8 metabolites, among which 3-pyridylacetic acid (3-PAA), 5-(3-pyridyl)tetrahydrofuranone-2 (PTHF), and 4-hydroxy-4-(3-pyridyl)butanoic acid (HPBA) were three novel metabolites that were not previously found in microbial degradation of tobacco alkaloids. Interestingly, these metabolites have been observed in the nicotine metabolic pathways of humans and animals. In addition, 3-PAA, which is believed to be the major end product of nicotine metabolism in humans, is also found to be an end product of myosmine degradation in strain J-6. Based on the identified metabolites and genomic analysis, a previously unreported bacterial degradation pathway for tobacco alkaloids was proposed. The downstream part of this pathway for converting SP to 3-PAA resembles the pathway for mammalian metabolism of SP to 3-PAA. Overall, the findings in this study offer novel insights into the degradation pathways and mechanisms of myosmine, which will deepen our understanding on the fate of myosmine both in the environment and within the human body.
Collapse
Affiliation(s)
- Bingjun Dang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China
| | - Hui Gao
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China
| | - Wei Jia
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China
| | - Yuwei Zhang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China
| | - Zicheng Xu
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China.
| | - Dan Han
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China
| | - Jinchu Yang
- Technology Center, China Tobacco Henan Industrial Co., Ltd., Zhengzhou 450000, China
| | - Yao Huang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Zheng Chen
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China
| | - Yadi Wang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Yingqiu Duan
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Ruohua Yuan
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Yimeng Qiao
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Hexiang Yu
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Pengfei Jin
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Hangting Ai
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China
| | - Wuxing Huang
- College of Tobacco Science, Henan Agricultural University, Zhengzhou 450002, China; National Tobacco Cultivation and Physiology and Biochemistry Research Center, Zhengzhou 450002, China; Key Laboratory for Tobacco Cultivation of Tobacco Industry, Zhengzhou 450002, China.
| |
Collapse
|
2
|
Takano Y, Takekoshi S, Takano K, Matoba Y, Mukumoto M, Sowa K, Kitazumi Y, Shirai O. Comparative evaluation of trimethylated α-, β-, and γ-cyclodextrins as optimal dispersants for ready biodegradability testing of poorly water-soluble substances. JOURNAL OF PESTICIDE SCIENCE 2024; 49:210-223. [PMID: 39877881 PMCID: PMC11770189 DOI: 10.1584/jpestics.d24-015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/15/2024] [Accepted: 08/12/2024] [Indexed: 01/31/2025]
Abstract
We investigated whether various modified cyclodextrins (CDs) and emulsifiers could be applied as dispersing agents in ready biodegradability tests of poorly water-soluble substances. Trimethylated α-, β-, and γ-CDs and partially methylated β-CD were not biodegraded in the test period but accelerated the biodegradation of octabenzone and anthraquinone. The process by which trimethylated α-, β-, and γ-CDs enhance the biodegradation of test substances has been partially uncovered. These CDs create inclusion complexes with the substances, which then coalesce into larger aggregates. These aggregates disperse throughout the testing medium and attach to clusters of activated sludge, known as flocs. This close contact with the sludge speeds up the breakdown of the hydrophobic substances being tested.
Collapse
Affiliation(s)
- Yoshinari Takano
- Sumitomo Chemical Co., Ltd. Environmental Health Science Laboratory
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Saki Takekoshi
- Sumitomo Chemical Co., Ltd. Environmental Health Science Laboratory
| | - Kotaro Takano
- Sumitomo Chemical Co., Ltd. Environmental Health Science Laboratory
| | - Yoshihide Matoba
- Sumitomo Chemical Co., Ltd. Environmental Health Science Laboratory
| | - Makiko Mukumoto
- Sumitomo Chemical Co., Ltd. Environmental Health Science Laboratory
| | - Keisei Sowa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Yuki Kitazumi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Osamu Shirai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| |
Collapse
|
3
|
Jorge AMS, Silva GMC, Coutinho JAP, Pereira JFB. Unravelling the molecular interactions behind the formation of PEG/PPG aqueous two-phase systems. Phys Chem Chem Phys 2024; 26:7308-7317. [PMID: 38351888 DOI: 10.1039/d3cp05539f] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/29/2024]
Abstract
The understanding of molecular interactions that control phase separation in polymer/polymer aqueous two-phase systems (ATPS) has been a subject of debate up to this day. In light of this, we set out to investigate the molecular interactions occurring in ternary mixtures composed of polyethylene glycol (PEG600), polypropylene glycol (PPG400) and water. The ternary phase diagram was plotted at two temperatures (298 K and 323 K), revealing a transition from a type 0 to a type I diagram. Molecular dynamics (MD) simulations were performed to elucidate the polymer-polymer and polymer-water interactions occurring at different temperatures and water concentrations. COnductor-like Screening Model for Realistic Solvents (COSMO-RS) was used to assess the thermodynamic properties of the polymer-water binary mixtures and their correlation with ATPS formation. The MD simulations clearly demonstrate the effect of segregation/separation with increasing water content and temperature, highlighting a significant reduction in PPG-water interactions compared to PEG-water counterparts. Polymer-water interactions were identified as those controlling the phase separation mechanism, and the thermodynamic properties determined with COSMO-RS for the polymer-water binary systems further support this view.
Collapse
Affiliation(s)
- Alexandre M S Jorge
- CIEPQPF, FCTUC, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
| | - Gonçalo M C Silva
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal.
| | - João A P Coutinho
- Department of Chemistry, CICECO - Aveiro Institute of Materials, University of Aveiro Campus Universitário de Santiago, Aveiro, 3810-193, Portugal.
| | - Jorge F B Pereira
- CIEPQPF, FCTUC, Department of Chemical Engineering, University of Coimbra, Rua Sílvio Lima, Pólo II - Pinhal de Marrocos, 3030-790 Coimbra, Portugal.
| |
Collapse
|
4
|
Ishibashi R, Matsuhisa R, Nomoto M, Chudan S, Nishikawa M, Tabuchi Y, Ikushiro S, Nagai Y, Furusawa Y. Effect of Oral Administration of Polyethylene Glycol 400 on Gut Microbiota Composition and Diet-Induced Obesity in Mice. Microorganisms 2023; 11:1882. [PMID: 37630442 PMCID: PMC10456793 DOI: 10.3390/microorganisms11081882] [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: 06/23/2023] [Revised: 07/20/2023] [Accepted: 07/24/2023] [Indexed: 08/27/2023] Open
Abstract
Polyethylene glycol (PEG) is a commonly used dispersant for oral administration of hydrophobic agents. PEG is partly absorbed in the small intestine, and the unabsorbed fraction reaches the large intestine; thus, oral administration of PEG may impact the gut microbial community. However, to the best of our knowledge, no study evaluated the effects of PEG on gut commensal bacteria. Herein, we aimed to determine whether oral administration of PEG modifies the gut microbiota. Administration of PEG400 and PEG4000 altered gut microbial diversity in a concentration-dependent manner. Taxonomic analysis revealed that Akkermansia muciniphila and particularly Parabacteroides goldsteinii were overrepresented in mice administered with 40% PEG. PEG400 administration ameliorated the high-fat diet (HFD)-induced obesity and adipose tissue inflammation. Fecal microbiome transplantation from PEG400-administered donors counteracted the HFD-induced body and epididymal adipose tissue weight gain, indicating that PEG400-associated bacteria are responsible for the anti-obesity effect. Conversely, carboxymethyl cellulose, also used as a dispersant, did not affect the abundance of these two bacterial species or HFD-induced obesity. In conclusion, we demonstrated that oral administration of a high concentration of PEG400 (40%) alters the gut microbiota composition and ameliorates HFD-induced obesity.
Collapse
Affiliation(s)
- Riko Ishibashi
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Toyama 939-0398, Japan
| | - Rio Matsuhisa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Toyama 939-0398, Japan
| | - Mio Nomoto
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Toyama 939-0398, Japan
| | - Seita Chudan
- Department of Biotechnology, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama 939-0398, Japan
| | - Miyu Nishikawa
- Department of Biotechnology, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama 939-0398, Japan
| | - Yoshiaki Tabuchi
- Division of Molecular Genetics Research, Life Science Research Center, University of Toyama, Sugitani, Toyama 930-0194, Japan
| | - Shinichi Ikushiro
- Department of Biotechnology, Faculty of Engineering, Toyama Prefectural University, Kurokawa, Toyama 939-0398, Japan
| | - Yoshinori Nagai
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Toyama 939-0398, Japan
| | - Yukihiro Furusawa
- Department of Pharmaceutical Engineering, Faculty of Engineering, Toyama Prefectural University, 5180 Kurokawa, Toyama 939-0398, Japan
| |
Collapse
|
5
|
Muthuraja R, Muthukumar T, Natthapol C. Drought tolerance of Aspergillus violaceofuscus and Bacillus licheniformis and their influence on tomato growth and potassium uptake in mica amended tropical soils under water-limiting conditions. FRONTIERS IN PLANT SCIENCE 2023; 14:1114288. [PMID: 36938042 PMCID: PMC10014471 DOI: 10.3389/fpls.2023.1114288] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 02/06/2023] [Indexed: 06/18/2023]
Abstract
Drought is a significant abiotic stress that alters plant physiology and ultimately affects crop productivity. Among essential plant nutrients, potassium (K) is known to mitigate the deleterious effect of drought on plant growth. If so, K addition or inoculation of potassium solubilizing microorganisms (KSMs) that are tolerant to drought should promote plant growth during water stress. Therefore, in this study, K solubilizing Aspergillus violaceofuscus and Bacillus licheniformis, isolated from saxicolous environments, were tested for their capacity to tolerate drought using different molecular weights (~4000, 6000, and 8000 Da), and concentrations (0, 250, 500, 750, 1000, and 1250 mg/L) of polyethylene glycol (PEG) under in vitro conditions. The results showed that high concentrations (750 and 1000 mg/L) of PEG with different molecular weight considerably improved bacterial cell numbers/fungal biomass and catalase (CAT) and proline activities. Moreover, the ability of KSMs alone or in combination to impart drought tolerance and promote plant growth in the presence and absence of mica (9.3% K2O) supplementation was tested in Alfisol and Vertisol soil types under greenhouse conditions. The results revealed that the tomato plants inoculated with KSMs individually or dually with/without mica improved the physiological and morphological traits of the tomato plants under drought. Generally, tomato plants co-inoculated with KSMs and supplemented with mica were taller (2.62 and 3.38-fold) and had more leaf area (2.03 and 1.98-fold), total root length (3.26 and 8.86-fold), shoot biomass (3.87 and 3.93-fold), root biomass (9.00 and 7.24-fold), shoot K content (3.08 and 3.62-fold), root K content (3.39 and 2.03-fold), relative water content (1.51 and 1.27-fold), CAT activity (2.11 and 2.14-fold), proline content (3.41 and 3.28-fold), and total chlorophyll content (1.81 and 1.90-fold), in unsterilized Alfisol and Vertisol soil types, respectively, than uninoculated ones. Dual inoculation of the KSMs along with mica amendment, also improved the endorrhizal symbiosis of tomato plants more than their individual inoculation or application in both soil types. These findings imply that the A. violaceofuscus and B. licheniformis isolates are promising as novel bioinoculants for improving crop growth in water-stressed and rainfed areas of the tropics in the future.
Collapse
Affiliation(s)
- Raji Muthuraja
- Department of Soil Science, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
- Department of Botany, Bharathiar University, Coimbatore, India
| | | | - Chittamart Natthapol
- Department of Soil Science, Faculty of Agriculture, Kasetsart University, Bangkok, Thailand
| |
Collapse
|
6
|
Sharma M, Khurana H, Singh DN, Negi RK. The genus Sphingopyxis: Systematics, ecology, and bioremediation potential - A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 280:111744. [PMID: 33280938 DOI: 10.1016/j.jenvman.2020.111744] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/22/2020] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
The genus Sphingopyxis was first reported in the year 2001. Phylogenetically, Sphingopyxis is well delineated from other genera Sphingobium, Sphingomonas and Novosphingobium of sphingomonads group, family Sphingomonadaceae of Proteobacteria. To date (at the time of writing), the genus Sphingopyxis comprises of twenty validly published species available in List of Prokaryotic Names with Standing in Nomenclature. Sphingopyxis spp. have been isolated from diverse niches including, agricultural soil, marine and fresh water, caves, activated sludge, thermal spring, oil and pesticide contaminated soil, and heavy metal contaminated sites. Sphingopyxis species have drawn considerable attention not only for their ability to survive under extreme environments, but also for their potential to degrade number of xenobiotics and other environmental contaminants that impose serious threat to human health. At present, genome sequence of both cultivable and non-cultivable strains (metagenome assembled genome) are available in the public databases (NCBI) and genome wide studies confirms the presence of mobile genetic elements and plethora of degradation genes and pathways making them a potential candidate for bioremediation. Beside genome wide predictions there are number of experimental evidences confirm the degradation potential of bacteria belonging to genus Sphingopyxis and also the production of different secondary metabolites that help them interact and survive in their ecological niches. This review provides detailed information on ecology, general characteristic and the significant implications of Sphingopyxis species in environmental management along with the bio-synthetic potential.
Collapse
Affiliation(s)
- Monika Sharma
- Fish Molecular Biology Laboratory, Department of Zoology, University of Delhi, Delhi-110007, India
| | - Himani Khurana
- Fish Molecular Biology Laboratory, Department of Zoology, University of Delhi, Delhi-110007, India
| | - Durgesh Narain Singh
- Bacterial Pathogenesis Laboratory, Department of Zoology, University of Delhi, Delhi-110007, India
| | - Ram Krishan Negi
- Fish Molecular Biology Laboratory, Department of Zoology, University of Delhi, Delhi-110007, India.
| |
Collapse
|
7
|
Hosseini Tafreshi SA, Aghaie P, Toghyani MA, Ramazani-Moghaddam-Arani A. Improvement of ionizing gamma irradiation tolerance of Chlorella vulgaris by pretreatment with polyethylene glycol. Int J Radiat Biol 2020; 96:919-928. [PMID: 32159411 DOI: 10.1080/09553002.2020.1741717] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Purpose: To evaluate the effects of polyethylene glycol (PEG) 6000 pretreatment on growth and physiological responses of eukaryotic microalga Chlorella vulgaris exposed to ionizing irradiation.Materials and methods: The microalgal cells pretreated with different PEG concentrations (0, 5, 10 and 20%) and then exposed to 300 Gray gamma irradiation at a dose rate of 0.5 Gy s-1. The various growth and physiological parameters including algal growth, cell size, the degree of electrolyte leakage (EL) and lipid peroxidation, the content of pigments and proline and the activity of antioxidant enzymes under gamma-free or 300 Gray gamma irradiation conditions were examined.Results: The results showed that PEG stimulated a higher growth and cell size under both stress-free and gamma-stress conditions. The maximum growth and cell size was reported when the algae was pretreated with 10% PEG. A relative increase of catalase activity was observed in all samples after exposing to gamma irradiation. However, the highest value was recorded for the gamma-radiated algae pretreated with 10% PEG. In the absence of PEG, gamma irradiation induced a significant reduction in ascorbate peroxidase activity, but with PEG pretreatment, the enzyme activity remained constant or even increased after gamma irradiation. On the other hand, although gamma irradiation stress generally suppressed the activity of superoxide dismutase in all cells, pretreating the algae with PEG could diminish this suppressing effect at all applied concentrations. Compared to the PEG-free controls, a lower rate of chlorophylls and membrane integrity loss was shown in the PEG-treated algae when exposed to gamma stress. Total carotenoid content in PEG-treated algae was also similar under both gamma-free and gamma-radiated conditions. A PEG-independent increase in proline accumulation was reported under gamma-irradiation treatment.Conclusions: Overall, the results suggested that PEG pretreatment could improve gamma-irradiation tolerance in C. vulgaris probably by stimulating a range of enzymatic and non-enzymatic reactive oxygen species scavenging systems. The microalgae may also consume PEG to break down and use it as an alternative source of carbon during stress which should be further studied in detail.
Collapse
Affiliation(s)
- Seyed Ali Hosseini Tafreshi
- Biotechnology Division, Department of Cell and Molecular Biology, Faculty of Chemistry, University of Kashan, Kashan, Iran
| | - Peyman Aghaie
- Department of Biology, Faculty of Science, Payame Noor University, Tehran, Iran
| | | | | |
Collapse
|
8
|
Jerdan R, Kuśmierska A, Petric M, Spiers AJ. Penetrating the air-liquid interface is the key to colonization and wrinkly spreader fitness. MICROBIOLOGY-SGM 2020; 165:1061-1074. [PMID: 31436522 DOI: 10.1099/mic.0.000844] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In radiating populations of Pseudomonas fluorescens SBW25, adaptive wrinkly spreader (WS) mutants are able to gain access to the air-liquid (A-L) interface of static liquid microcosms and achieve a significant competitive fitness advantage over other non-biofilm-forming competitors. Aerotaxis and flagella-based swimming allows SBW25 cells to move into the high-O2 region located at the top of the liquid column and maintain their position by countering the effects of random cell diffusion, convection and disturbance (i.e. physical displacement). However, wild-type cells showed significantly lower levels of enrichment in this region compared to the archetypal WS, indicating that WS cells employ an additional mechanism to transfer to the A-L interface where displacement is no longer an issue and a biofilm can develop at the top of the liquid column. Preliminary experiments suggest that this might be achieved through the expression of an as yet unidentified surface active agent that is weakly associated with WS cells and alters liquid surface tension, as determined by quantitative tensiometry. The effect of physical displacement on the colonization of the high-O2 region and A-L interface was reduced through the addition of agar or polyethylene glycol to increase liquid viscosity, and under these conditions the competitive fitness of the WS was significantly reduced. These observations suggest that the ability to transfer to the A-L interface from the high-O2 region and remain there without further expenditure of energy (through, for example, the deployment of flagella) is a key evolutionary innovation of the WS, as it allows subsequent biofilm development and significant population increase, thereby affording these adaptive mutants a competitive fitness advantage over non-biofilm-forming competitors located within the liquid column.
Collapse
Affiliation(s)
- Robyn Jerdan
- School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
| | - Anna Kuśmierska
- Department of Industrial Microbiology and Biotechnology, Faculty of Biology and Environmental Protection, University of Łódź, Łódź, Poland.,School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
| | - Marija Petric
- School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
| | - Andrew J Spiers
- School of Applied Sciences, Abertay University, Dundee DD1 1HG, UK
| |
Collapse
|
9
|
Xu X, Wang S, Gao F, Li J, Zheng L, Sun C, He C, Wang Z, Qu L. Marine microplastic-associated bacterial community succession in response to geography, exposure time, and plastic type in China's coastal seawaters. MARINE POLLUTION BULLETIN 2019; 145:278-286. [PMID: 31590788 DOI: 10.1016/j.marpolbul.2019.05.036] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 05/14/2019] [Accepted: 05/15/2019] [Indexed: 06/10/2023]
Abstract
Microplastics have emerged as new pollutants in oceans. Nevertheless, information of the long-term variations in the composition of plastic-associated microbial communities in coastal waters remains limited. This study applied high-throughput sequencing to investigate the successional stages of microbial communities attached to polypropylene and polyvinyl chloride microplastics exposed for one year in the coastal seawater of China. The composition of plastisphere microbial communities varied remarkably across geographical locations and exposure times. The dominant bacteria in the plastisphere were affiliated with the Alphaproteobacteria class, particularly Rhodobacteraceae, followed by the Gammaproteobacteria class. Scanning electron microscopy analysis revealed that the microplastics showed signs of degradation. Microbial communities showed adaptations to plastisphere including more diverse microbial community and greater "xenobiotics biodegradation and metabolism" in metabolic pathway analysis. The findings elucidate the long-term changes in the community composition of microorganisms that colonize microplastics and expand the understanding of plastisphere microbial communities present in the marine environment.
Collapse
Affiliation(s)
- Xiyuan Xu
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Shuai Wang
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Fenglei Gao
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Jingxi Li
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Li Zheng
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China; Laboratory of Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China.
| | - Chengjun Sun
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Changfei He
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Zongxing Wang
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| | - Lingyun Qu
- Key Laboratory of Marine Bioactive Substance, the First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
| |
Collapse
|
10
|
Ji J, Kakade A, Zhang R, Zhao S, Khan A, Liu P, Li X. Alcohol ethoxylate degradation of activated sludge is enhanced by bioaugmentation with Pseudomonas sp. LZ-B. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 169:335-343. [PMID: 30458400 DOI: 10.1016/j.ecoenv.2018.11.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 11/09/2018] [Accepted: 11/11/2018] [Indexed: 06/09/2023]
Abstract
An effective bioaugmentation strategy was developed for the removal of alcohol ethoxylates (AEs) from municipal wastewater. An AE-degrading strain, Pseudomonas sp. LZ-B, was isolated from an activated sludge. Strain LZ-B was able to degrade 96.8% of 200 mg/L C12E4 (Brij 30) within 24 h and showed significant biomass increase and removal of total oxygen concentration (TOC). The optimal degradation temperature and pH value were 37 °C and 6.0, respectively. The strain demonstrated greater potential to degrade five different molecular weight AEs within 5 days. HPLC-MS/MS analysis demonstrated that the major metabolites obtained were polyethylene glycol (PEG) and carboxylated AE chains. Activated sludge has a low ability to remove AEs. After inoculation of strain LZ-B into the activated sludge reactor, Strain LZ-B successfully colonized the activated sludge, and AE removal efficiency increased to more than 95% when the hydraulic retention time (HRT) was 10 h. After strain LZ-B cleaved the AE chains, the sludge microbial communities easily removed PEG fragments to facilitate complete biodegradation of AEs. This is the first report describing bioaugmentation to increase AE degradation in an activated sludge system.
Collapse
Affiliation(s)
- Jing Ji
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Apurva Kakade
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Rulan Zhang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Shuai Zhao
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Aman Khan
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China
| | - Pu Liu
- Department of Development Biology Sciences, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, PR China
| | - Xiangkai Li
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, Gansu 730000, PR China; Department of Development Biology Sciences, School of Life Science, Lanzhou University, Tianshui South Road #222, Lanzhou, Gansu 730000, PR China.
| |
Collapse
|
11
|
Debroas D, Mone A, Ter Halle A. Plastics in the North Atlantic garbage patch: A boat-microbe for hitchhikers and plastic degraders. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 599-600:1222-1232. [PMID: 28514840 DOI: 10.1016/j.scitotenv.2017.05.059] [Citation(s) in RCA: 215] [Impact Index Per Article: 26.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 05/05/2017] [Accepted: 05/05/2017] [Indexed: 05/20/2023]
Abstract
Plastic is a broad name given to different polymers with high molecular weight that impact wildlife. Their fragmentation leads to a continuum of debris sizes (meso to microplastics) entrapped in gyres and colonized by microorganisms. In the present work, the structure of eukaryotes, bacteria and Archaea was studied by a metabarcoding approach, and statistical analysis associated with network building was used to define a core microbiome at the plastic surface. Most of the bacteria significantly associated with the plastic waste originated from non-marine ecosystems, and numerous species can be considered as hitchhikers, whereas others act as keystone species (e.g., Rhodobacterales, Rhizobiales, Streptomycetales and Cyanobacteria) in the biofilm. The chemical analysis provides evidence for a specific colonization of the polymers. Alphaproteobacteria and Gammaproteobacteria significantly dominated mesoplastics consisting of poly(ethylene terephthalate) and polystyrene. Polyethylene was also dominated by these bacterial classes and Actinobacteria. Microplastics were made of polyethylene but differed in their crystallinity, and the majorities were colonized by Betaproteobacteria. Our study indicated that the bacteria inhabiting plastics harboured distinct metabolisms from those present in the surrounding water. For instance, the metabolic pathway involved in xenobiotic degradation was overrepresented on the plastic surface.
Collapse
Affiliation(s)
- Didier Debroas
- Université Clermont Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France.
| | - Anne Mone
- Université Clermont Auvergne, CNRS, Laboratoire Microorganismes: Génome et Environnement, F-63000 Clermont-Ferrand, France
| | - Alexandra Ter Halle
- Laboratoire des IMRCP, Université de Toulouse, CNRS UMR 5623, Université Paul Sabatier, 118 route de Narbonne, 31062 Toulouse Cedex 9, France
| |
Collapse
|
12
|
Chen H, Carter KE. Characterization of the chemicals used in hydraulic fracturing fluids for wells located in the Marcellus Shale Play. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2017; 200:312-324. [PMID: 28591666 DOI: 10.1016/j.jenvman.2017.05.069] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2016] [Revised: 05/19/2017] [Accepted: 05/21/2017] [Indexed: 06/07/2023]
Abstract
Hydraulic fracturing, coupled with the advances in horizontal drilling, has been used for recovering oil and natural gas from shale formations and has aided in increasing the production of these energy resources. The large volumes of hydraulic fracturing fluids used in this technology contain chemical additives, which may be toxic organics or produce toxic degradation byproducts. This paper investigated the chemicals introduced into the hydraulic fracturing fluids for completed wells located in Pennsylvania and West Virginia from data provided by the well operators. The results showed a total of 5071 wells, with average water volumes of 5,383,743 ± 2,789,077 gal (mean ± standard deviation). A total of 517 chemicals was introduced into the formulated hydraulic fracturing fluids. Of the 517 chemicals listed by the operators, 96 were inorganic compounds, 358 chemicals were organic species, and the remaining 63 cannot be identified. Many toxic organics were used in the hydraulic fracturing fluids. Some of them are carcinogenic, including formaldehyde, naphthalene, and acrylamide. The degradation of alkylphenol ethoxylates would produce more toxic, persistent, and estrogenic intermediates. Acrylamide monomer as a primary degradation intermediate of polyacrylamides is carcinogenic. Most of the chemicals appearing in the hydraulic fracturing fluids can be removed when adopting the appropriate treatments.
Collapse
Affiliation(s)
- Huan Chen
- Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996, United States
| | - Kimberly E Carter
- Department of Civil and Environmental Engineering, University of Tennessee, Knoxville, TN 37996, United States.
| |
Collapse
|
13
|
Mascia L, Su R, Clarke J, Lou Y, Mele E. Fibres from blends of epoxidized natural rubber and polylactic acid by the electrospinning process: Compatibilization and surface texture. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.033] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
14
|
Complete Genome Sequence of a Polypropylene Glycol-Degrading Strain, Microbacterium sp. No. 7. GENOME ANNOUNCEMENTS 2015; 3:3/6/e01400-15. [PMID: 26659673 PMCID: PMC4675938 DOI: 10.1128/genomea.01400-15] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Microbacterium (formerly Corynebacterium) sp. No. 7 was isolated from activated sludge as a polypropylene glycol (PPG)-assimilating bacterial strain. Its oxidative PPG degradation has been proposed on the basis of PPG dehydrogenase activity and the metabolic products. Here, we report the complete genome sequence of Microbacterium sp. No. 7. The genome of the strain No. 7 is composed of a 4,599,046-bp circular chromosome and two linear plasmids. The whole finishing was conducted in silico with aids of the computational tools GenoFinisher and AceFileViewer. Strain No. 7 is available from the Biological Resource Center, National Institute of Technology and Evaluation (NITE) (Tokyo, Japan).
Collapse
|
15
|
Complete Genome Sequence of Polypropylene Glycol- and Polyethylene Glycol-Degrading Sphingopyxis macrogoltabida Strain EY-1. GENOME ANNOUNCEMENTS 2015; 3:3/6/e01399-15. [PMID: 26634754 PMCID: PMC4669395 DOI: 10.1128/genomea.01399-15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Strain EY-1 was isolated from a microbial consortium growing on a random polymer of ethylene oxide and propylene oxide. Strain EY-1 grew on polyethylene glycol and polypropylene glycol and identified as Sphingopyxis macrogoltabida. Here, we report the complete genome sequence of Sphingopyxis macrogoltabida EY-1. The genome of strain EY-1 is comprised of a 4.76-Mb circular chromosome, and five plasmids. The whole finishing was conducted in silico, with aids of computational tools GenoFinisher and AceFileViewer. Strain EY-1 is available from Biological Resource Center, National Institute of Technology and Evaluation (Tokyo, Japan) (NITE).
Collapse
|
16
|
Nakai S, Okuda T, Nishijima W, Okada M. Production of mono- and di-carboxylated polyethylene glycols as a factor obstacle to the successful ozonation-assisted biodegradation of ethoxylated compounds. CHEMOSPHERE 2015; 136:153-9. [PMID: 25985303 DOI: 10.1016/j.chemosphere.2015.04.069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 04/17/2015] [Accepted: 04/25/2015] [Indexed: 05/20/2023]
Abstract
Ozonation is believed to improve the biodegradability of organic compounds. In the present study, degradation of nonylphenol ethoxylates (NPEOs) was monitored in hybrid treatment systems consisting of ozonation and microbial degradation processes. We found that ozonation of NPEOs decreased, rather than increased, the biodegradability under certain conditions. The timing of ozonation was a definitive factor in determining whether ozonation increased or decreased the biodegradation rates of NPEOs. Initial ozonation of NPEOs prior to biodegradation reduced the rate of dissolved organic carbon (DOC) removal during the subsequent 14 d of biodegradation, whereas intermediate ozonation at the 9th day of biodegradation improved subsequent DOC removal during 14 d of NPEO biodegradation. Furthermore, reduction of DOC removal was also observed, when initial ozonation prior to biodegradation was subjected to cetyl alcohol ethoxylates. The production of less biodegradable intermediates, such as mono- and dicarboxylated polyethylene glycols (MCPEGs and DCPEGs), was responsible for the negative effect of ozonation on biodegradability of NPEOs. DCPEGs and MCPEGs were produced by biodegradation of polyethylene glycols (PEGs) that were ozonolysis products of the NPEOs, and the biodegradability of DCPEGs and MCPEGs was less than that of the precursor PEGs. The results indicate that, if the target chemicals contain ethoxy chains, production of PEGs may be one of the important factors when ozonation is considered.
Collapse
Affiliation(s)
- Satoshi Nakai
- Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan.
| | - Tetsuji Okuda
- Environmental Research Management Center, Hiroshima University, Higashi-Hiroshima 739-8513, Japan.
| | - Wataru Nishijima
- Environmental Research Management Center, Hiroshima University, Higashi-Hiroshima 739-8513, Japan.
| | - Mitsumasa Okada
- Faculty of Liberal Arts, The Open University of Japan, Chiba 261-8586, Japan.
| |
Collapse
|
17
|
Kilvington S, Shovlin J, Nikolic M. Identification and susceptibility to multipurpose disinfectant solutions of bacteria isolated from contact lens storage cases of patients with corneal infiltrative events. Cont Lens Anterior Eye 2013; 36:294-8. [DOI: 10.1016/j.clae.2013.02.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 01/30/2013] [Accepted: 02/02/2013] [Indexed: 11/27/2022]
|
18
|
|
19
|
Tachibana S, Naka N, Kawai F, Yasuda M. Purification and characterization of cytoplasmic NAD-dependent polypropylene glycol dehydrogenase from Stenotrophomonas maltophilia. FEMS Microbiol Lett 2009; 288:266-72. [PMID: 19054086 DOI: 10.1111/j.1574-6968.2008.01363.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
The oxidizing enzyme NAD(+)-dependent polypropylene glycol dehydrogenase (PPG-DH) was purified to homogeneity from the cytoplasmic fraction of Stenotrophomonas maltophilia grown on polypropylene glycol (diol type) 2000. The purified enzyme consisted of a homotetrameric protein (37 kDa subunit) with a molecular mass of around 154 kDa. The N-terminal amino acid sequence (25 residues) showed similarity to the sequences of NAD(+)-dependent secondary alcohol dehydrogenases and NADH-dependent reductases. The enzyme preferentially oxidized medium-chain secondary alcohols, di- and tri-propylene glycols and polypropylene glycols including those with secondary alcohol groups in their molecular structure. Consequently, the enzyme was classified into a group of NAD(+)-dependent secondary alcohol dehydrogenases.
Collapse
Affiliation(s)
- Shinjiro Tachibana
- Department of Bioscience and Biotechnology, Faculty of Agriculture, University of the Ryukyus, Okinawa, Japan
| | | | | | | |
Collapse
|
20
|
Involvement of PEG-carboxylate dehydrogenase and glutathione S-transferase in PEG metabolism by Sphingopyxis macrogoltabida strain 103. Appl Microbiol Biotechnol 2008; 81:473-84. [PMID: 18719904 DOI: 10.1007/s00253-008-1635-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2008] [Revised: 07/24/2008] [Accepted: 07/30/2008] [Indexed: 10/21/2022]
Abstract
Sphingopyxis terrae and the Sphingopyxis macrogoltabida strains 103 and 203 are able to degrade polyethylene glycol (PEG). They possess the peg operon, which is responsible for the conversion of PEG to PEG-carboxylate-coenzyme A (CoA). The upstream (3.0 kb) and downstream (6.5 kb) regions of the operon in strain 103 were cloned and sequenced. The structure was well conserved between S. macrogoltabida strain 203 and S. terrae, except that two sets of transposases are absent in strain 203. The downstream region contains the genes for PEG-carboxylate dehydrogenase (PCDH), glutathione S-transferase (GST), tautomerase, and a hypothetical protein. The genes for pcdh and gst were transcribed constitutively and monocistronically, indicating that their transcription is independent of the operon regulation. PCDH and GST were expressed in Escherichia coli and characterized biochemically. PCDH is a homotetramer of 64-kDa subunits and contains one molecule of flavin adenine dinucleotide per subunit. The enzyme dehydrogenates PEG-carboxylate to yield glyoxylate, suggesting that the enzyme is the third enzyme involved in PEG degradation. GST is a homodimer of 28-kDa subunits. GST activity was noncompetitively inhibited by acyl-CoA and PEG-carboxylate-CoA, suggesting the interaction of GST with them. The proposed role for GST is to buffer the toxicity of PEG-carboxylate-CoA.
Collapse
|