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Hosseini S, Sharifi R, Habibi A, Ali Q. Molecular identification of rhamnolipids produced by Pseudomonas oryzihabitans during biodegradation of crude oil. Front Microbiol 2024; 15:1459112. [PMID: 39234543 PMCID: PMC11372847 DOI: 10.3389/fmicb.2024.1459112] [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: 07/03/2024] [Accepted: 08/07/2024] [Indexed: 09/06/2024] Open
Abstract
Introduction The ability to produce biosurfactants plays a meaningful role in the bioavailability of crude oil hydrocarbons and the bioremediation efficiency of crude oil-degrading bacteria. This study aimed to characterize the produced biosurfactants by Pseudomonas oryzihabitans during the biodegradation of crude oil hydrocarbons. Methods The biosurfactants were isolated and then characterized by Fourier transform infrared (FTIR), liquid chromatography-mass-spectrometry (LC-MS), and nuclear magnetic resonance spectroscopy (NMR) analyses. Results The FTIR results revealed the existence of hydroxyl, carboxyl, and methoxyl groups in the isolated biosurfactants. Also, the LC-MS analysis demonstrated a main di-rhamnolipid (l-rhamnopyranosyll-rhamnopyranosyl-3-hydroxydecanoyl-3-hydroxydecanoate, Rha-Rha-C10-C10) along with a mono-rhamnolipid (l-rhamnopyranosyl-b-hydroxydecanoylb-hydroxydecanoate, Rha-C10-C10). In agreement with these findings, the NMR analysis confirmed the aromatic, carboxylic, methyl, sulfate moieties, and hexose sugar in the biosurfactants. The emulsion capacity of the biosurfactants decreased the surface tension of the aqueous system from 73.4 mN m-1 to around 33 mN m-1 at 200 mg L-1 as the critical micelle concentration. The emulsification capacity of the biosurfactants in the formation of a stable microemulsion for the diesel-water system at a wide range of pH (2-12), temperature (0-80°C), and salinity (2-20 g L-1 of NaCl) showed their potential use in oil recovery and bioremediation through the use of microbial enhancement. Discussion This work showed the ability of Pseudomonas oryzihabitans NC392 cells to produce rhamnolipid molecules during the biodegradation process of crude oil hydrocarbons. These biosurfactants have potential in bioremediation studies as eco-friendly and biodegradable products, and their stability makes them optimal for areas with extreme conditions.
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Affiliation(s)
- Saman Hosseini
- Department of Plant Protection, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
| | - Rouhallah Sharifi
- Department of Plant Protection, College of Agriculture and Natural Resources, Razi University, Kermanshah, Iran
| | - Alireza Habibi
- Faculty of Petroleum and Chemical Engineering, Razi University, Kermanshah, Iran
| | - Qurban Ali
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
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Bastos CG, Livio DF, de Oliveira MA, Meira HGR, Tarabal VS, Colares HC, Parreira AG, Chagas RCR, Speziali MG, da Silva JA, Granjeiro JM, Millán RDS, Gonçalves DB, Granjeiro PA. Exploring the biofilm inhibitory potential of Candida sp. UFSJ7A glycolipid on siliconized latex catheters. Braz J Microbiol 2024:10.1007/s42770-024-01431-w. [PMID: 38954220 DOI: 10.1007/s42770-024-01431-w] [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: 11/15/2023] [Accepted: 06/19/2024] [Indexed: 07/04/2024] Open
Abstract
Biosurfactants, sustainable alternatives to petrochemical surfactants, are gaining attention for their potential in medical applications. This study focuses on producing, purifying, and characterizing a glycolipid biosurfactant from Candida sp. UFSJ7A, particularly for its application in biofilm prevention on siliconized latex catheter surfaces. The glycolipid was extracted and characterized, revealing a critical micellar concentration (CMC) of 0.98 mg/mL, indicating its efficiency at low concentrations. Its composition, confirmed through Fourier transform infrared spectroscopy (FT-IR) and thin layer chromatography (TLC), identified it as an anionic biosurfactant with a significant ionic charge of -14.8 mV. This anionic nature contributes to its biofilm prevention capabilities. The glycolipid showed a high emulsification index (E24) for toluene, gasoline, and soy oil and maintained stability under various pH and temperature conditions. Notably, its anti-adhesion activity against biofilms formed by Escherichia coli, Enterococcus faecalis, and Candida albicans was substantial. When siliconized latex catheter surfaces were preconditioned with 2 mg/mL of the glycolipid, biofilm formation was reduced by up to 97% for E. coli and C. albicans and 57% for E. faecalis. These results are particularly significant when compared to the efficacy of conventional surfactants like SDS, especially for E. coli and C. albicans. This study highlights glycolipids' potential as a biotechnological tool in reducing biofilm-associated infections on medical devices, demonstrating their promising applicability in healthcare settings.
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Affiliation(s)
- Cibele Garcia Bastos
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Diego Fernandes Livio
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Maria Auxiliadora de Oliveira
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Hiure Gomes Ramos Meira
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Vinícius Souza Tarabal
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Heloísa Carneiro Colares
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Adriano Guimarães Parreira
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Rafael César Russo Chagas
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Marcelo Gomes Speziali
- Chemistry Department, Federal University of Ouro Preto, Ouro Preto, MG, 35400-000, Brazil
| | - José Antônio da Silva
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - José Mauro Granjeiro
- National Institute of Metrology, Quality, and Technology, Duque de Caxias, RJ, 25250-020, Brazil
| | | | - Daniel Bonoto Gonçalves
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil
| | - Paulo Afonso Granjeiro
- Campus Centro Oeste, Federal University of São João del-Rei, Sebastião Gonçalves Coelho St., 400, Divinópolis, MG, 35501-296, Brazil.
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Okouakoua FY, Kayath CA, Mokemiabeka SN, Moukala DCR, Kaya-Ongoto MD, Nguimbi E. Involvement of the Bacillus SecYEG Pathway in Biosurfactant Production and Biofilm Formation. Int J Microbiol 2024; 2024:6627190. [PMID: 38725978 PMCID: PMC11081756 DOI: 10.1155/2024/6627190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Revised: 04/02/2024] [Accepted: 04/15/2024] [Indexed: 05/12/2024] Open
Abstract
With Bacillus species, about 30% of extracellular proteins are translocated through the cytoplasmic membrane, coordinated by the Sec translocase. This system mainly consists of the cytoplasmic ATPase SecA and the membrane-embedded SecYEG channel. The purpose of this work was to investigate the effects of the SecYEG export system on the production of industrial biomolecules, such as biosurfactants, proteases, amylases, and cellulases. Fifty-two isolates of Bacillus species were obtained from traditional fermented foods and then characterized using molecular microbiology methods. The isolates secreted exoenzymes that included cellulases, amylases, and proteases. We present evidence that a biosurfactant-like molecule requires the SecA ATPase and the SecYEG membrane channel for its secretion. In addition, we showed that biomolecules involved in biofilm formation required the SecYEG pathway. This work presents a novel seven-target fragment multiplex PCR assay capable of identification at the species level of Bacillus through a unique SecDF chromosomal gene. The bacterial membrane protein SecDF allowed the discrimination of Bacillus subtilis, B. licheniformis, B. amyloliquefaciens, and B. sonorensis. SecA was able to interact with AprE, AmyE, and TasA. The Rose Bengal inhibitor of SecA crucially affected the interaction of AprE, AmyE, TapA, and TasA with recombinant Gst-SecA. The Rose Bengal prevented Bacillus species from secreting and producing proteases, cellulases, amylases, and biosurfactant-like molecules. It also inhibited the formation of biofilm cell communities. The data support, for the first time, that the SecYEG translocon mediates the secretion of a biosurfactant-like molecule.
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Affiliation(s)
- Frédéric Yannick Okouakoua
- Laboratoire de Biologie Cellulaire et Moléculaire (BCM), Faculté des Sciences et Techniques, Université Marien N'GOUABI, BP. 69, Brazzaville, Congo
- Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Avenue de l'Auberge Gascogne, B.P 2400, Brazzaville, Congo
| | - Christian Aimé Kayath
- Laboratoire de Biologie Cellulaire et Moléculaire (BCM), Faculté des Sciences et Techniques, Université Marien N'GOUABI, BP. 69, Brazzaville, Congo
- Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Avenue de l'Auberge Gascogne, B.P 2400, Brazzaville, Congo
| | - Saturnin Nicaise Mokemiabeka
- Laboratoire de Biologie Cellulaire et Moléculaire (BCM), Faculté des Sciences et Techniques, Université Marien N'GOUABI, BP. 69, Brazzaville, Congo
- Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Avenue de l'Auberge Gascogne, B.P 2400, Brazzaville, Congo
| | - David Charles Roland Moukala
- Laboratoire de Biologie Cellulaire et Moléculaire (BCM), Faculté des Sciences et Techniques, Université Marien N'GOUABI, BP. 69, Brazzaville, Congo
- Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Avenue de l'Auberge Gascogne, B.P 2400, Brazzaville, Congo
| | - Moïse Doria Kaya-Ongoto
- Laboratoire de Biologie Cellulaire et Moléculaire (BCM), Faculté des Sciences et Techniques, Université Marien N'GOUABI, BP. 69, Brazzaville, Congo
- Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Avenue de l'Auberge Gascogne, B.P 2400, Brazzaville, Congo
| | - Etienne Nguimbi
- Laboratoire de Biologie Cellulaire et Moléculaire (BCM), Faculté des Sciences et Techniques, Université Marien N'GOUABI, BP. 69, Brazzaville, Congo
- Institut National de Recherche en Sciences Exactes et Naturelles (IRSEN), Avenue de l'Auberge Gascogne, B.P 2400, Brazzaville, Congo
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Naaz T, Kumari S, Sharma K, Singh V, Khan AA, Pandit S, Priya K, Jadhav DA. Bioremediation of hydrocarbon by co-culturing of biosurfactant-producing bacteria in microbial fuel cell with Fe 2O 3-modified anode. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 351:119768. [PMID: 38100858 DOI: 10.1016/j.jenvman.2023.119768] [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: 08/21/2023] [Revised: 11/13/2023] [Accepted: 12/03/2023] [Indexed: 12/17/2023]
Abstract
The most common type of environmental contamination is petroleum hydrocarbons. Sustainable and environmentally friendly treatment strategies must be explored in light of the increasing challenges of toxic and critical wastewater contamination. This paper deals with the bacteria-producing biosurfactant and their employment in the bioremediation of hydrocarbon-containing waste through a microbial fuel cell (MFC) with Pseudomonas aeruginosa (exoelectrogen) as co-culture for simultaneous power generation. Staphylococcus aureus is isolated from hydrocarbon-contaminated soil and is effective in hydrocarbon degradation by utilizing hydrocarbon (engine oil) as the only carbon source. The biosurfactant was purified using silica-gel column chromatography and characterised through FTIR and GCMS, which showed its glycolipid nature. The isolated strains are later employed in the MFCs for the degradation of the hydrocarbon and power production simultaneously which has shown a power density of 6.4 W/m3 with a 93% engine oil degradation rate. A biogenic Fe2O3 nanoparticle (NP) was synthesized using Bambusa arundinacea shoot extract for anode modification. It increased the power output by 37% and gave the power density of 10.2 W/m3. Thus, simultaneous hydrocarbon bioremediation from oil-contamination and energy recovery can be achieved effectively in MFC with modified anode.
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Affiliation(s)
- Tahseena Naaz
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, Uttar Pradesh, India
| | - Shilpa Kumari
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, Uttar Pradesh, India
| | - Kalpana Sharma
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, Uttar Pradesh, India
| | - Vandana Singh
- Department of Microbiology, School of Allied Health Sciences, Sharda University, Greater Noida, 201310, Uttar Pradesh, India
| | - Azmat Ali Khan
- Pharmaceutical Biotechnology Laboratory, Department of Pharmaceutical Chemistry, College of Pharmacy, King Saud University, Riyadh, 11451, Saudi Arabia
| | - Soumya Pandit
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, Uttar Pradesh, India.
| | - Kanu Priya
- Department of Life Sciences, School of Basic Sciences and Research, Sharda University, Greater Noida, 201310, Uttar Pradesh, India.
| | - Dipak A Jadhav
- Department of Environmental Engineering, College of Ocean Science and Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yeongdo-gu, Busan, 49112, Republic of Korea.
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Dietz-Vargas C, Valenzuela-Ibaceta F, Carrasco V, Pérez-Donoso JM. Solid medium for the direct isolation of bacterial colonies growing with polycyclic aromatic hydrocarbons or 2,4,6-trinitrotoluene (TNT). Arch Microbiol 2023; 205:271. [PMID: 37358740 DOI: 10.1007/s00203-023-03610-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 05/31/2023] [Accepted: 06/15/2023] [Indexed: 06/27/2023]
Abstract
Isolation of hydrocarbon-degrading bacteria is a key step for the study of microbiological diversity, metabolic pathways, and bioremediation. However current strategies lack simplicity and versatility. We developed an easy method for the screening and isolation of bacterial colonies capable of degrading hydrocarbons, such as diesel or polycyclic aromatic hydrocarbons (PAHs), as well as the pollutant explosive, 2,4,6-trinitrotoluene (TNT). The method uses a two-layer solid medium, with a layer of M9 medium, and a second layer containing the carbon source deposited through the evaporation of ethanol. Using this medium we grew hydrocarbon-degrading strains, as well as TNT-degrading isolates. We were able to isolate PAHs-degrading bacterial colonies directly from diesel-polluted soils. As a proof of concept, we used this method to isolate a phenanthrene-degrading bacteria, identified as Acinetobacter sp. and determined its ability to biodegrade this hydrocarbon.
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Affiliation(s)
- Claudio Dietz-Vargas
- Bionanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República #330, Santiago, Chile
| | - Felipe Valenzuela-Ibaceta
- Bionanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República #330, Santiago, Chile
| | - Valentina Carrasco
- Bionanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República #330, Santiago, Chile
| | - José M Pérez-Donoso
- Bionanotechnology and Microbiology Laboratory, Center for Bioinformatics and Integrative Biology (CBIB), Facultad de Ciencias de la Vida, Universidad Andres Bello, Av. República #330, Santiago, Chile.
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Nishimura M, Tanaka T, Murata S, Miyabe A, Ishige T, Kawasaki K, Yokoyama M, Hashimoto N, Yamagata K, Nagano H, Tojo-Nishimura S, Matsushita K. Extension of bacterial rDNA sequencing for simultaneous methylation detection and its application in microflora analysis. Sci Rep 2023; 13:5731. [PMID: 37029177 PMCID: PMC10082018 DOI: 10.1038/s41598-023-28706-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Accepted: 01/23/2023] [Indexed: 04/09/2023] Open
Abstract
Although polymerase chain reaction (PCR) amplification and sequencing of the bacterial 16S rDNA region has numerous scientific applications, it does not provide DNA methylation information. Herein, we propose a simple extension for bisulfite sequencing to investigate 5-methylcytosine residues in the bacterial 16S rDNA region from clinical isolates or flora. Multiple displacement amplification without DNA denaturation was used to preferentially pre-amplify single-stranded bacterial DNA after bisulfite conversion. Following the pre-amplification, the 16S rDNA region was analyzed using nested bisulfite PCR and sequencing, enabling the simultaneous identification of DNA methylation status and sequence data. We used this approach (termed sm16S rDNA PCR/sequencing) to identify novel methylation sites and a methyltransferase (M. MmnI) in Morganella morganii and different methylation motifs among Enterococcus faecalis strains from small volumes of clinical specimens. Further, our analysis suggested that M. MmnI may be correlated to erythromycin resistance. Thus, sm16S rDNA PCR/sequencing is a useful extension method for analyzing the DNA methylation of 16S rDNA regions in a microflora, providing additional information not provided by conventional PCR. Given the relationship between DNA methylation status and drug resistance in bacteria, we believe this technique can be effectively applied in clinical sample testing.
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Affiliation(s)
- Motoi Nishimura
- Division of Laboratory Medicine, Clinical Genetics and Proteomics, Chiba University Hospital, Chiba, Japan.
| | - Tomoaki Tanaka
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
- Research Institute of Disaster Medicine, Chiba University, Chiba, Japan
| | - Syota Murata
- Division of Laboratory Medicine, Clinical Genetics and Proteomics, Chiba University Hospital, Chiba, Japan
| | - Akiko Miyabe
- Division of Laboratory Medicine, Clinical Genetics and Proteomics, Chiba University Hospital, Chiba, Japan
| | - Takayuki Ishige
- Division of Laboratory Medicine, Clinical Genetics and Proteomics, Chiba University Hospital, Chiba, Japan
| | - Kenji Kawasaki
- Division of Laboratory Medicine, Clinical Genetics and Proteomics, Chiba University Hospital, Chiba, Japan
| | - Masataka Yokoyama
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Naoko Hashimoto
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
- Research Institute of Disaster Medicine, Chiba University, Chiba, Japan
| | - Kazuyuki Yamagata
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Hidekazu Nagano
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Satomi Tojo-Nishimura
- Department of Molecular Diagnosis, Graduate School of Medicine, Chiba University, Chiba, Japan
| | - Kazuyuki Matsushita
- Division of Laboratory Medicine, Clinical Genetics and Proteomics, Chiba University Hospital, Chiba, Japan
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Habib S, Ahmed A, Haque MFU, Ejaz R. Efficacious use of potential biosurfactant producing plant growth promoting rhizobacteria to combat petrol toxicity in Zea mays L. plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:53725-53740. [PMID: 36864337 DOI: 10.1007/s11356-023-25925-6] [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: 11/29/2022] [Accepted: 02/09/2023] [Indexed: 06/19/2023]
Abstract
Soil pollution caused by petroleum hydrocarbons is a serious threat for human life, as it affects the groundwater, cause economical losses after decreasing the agricultural production, and create other ecological issues. Here, we are reporting the isolation and screening of rhizosphere bacteria possessing biosurfactant producing potential and capable of enhancing plant growth under petrol stress as well as possessing. Efficient biosurfactant producers having plant growth promoting traits were characterized morphologically, physiologically, and phylogenetically. These selected isolates were identified as Bacillus albus S2i, Paraclostridium benzoelyticum Pb4, and Proteus mirabilis Th1 based on 16S rRNA sequence analysis. These bacteria possessed plant growth promoting attributes as well as exhibited positive activity toward the assays based on hydrophobicity, lipase activity, surface activity, and hydrocarbon degradation that indicated the production of biosurfactants. Fourier transform infrared spectroscopy of crude biosurfactants extracted from bacterial strains revealed that the biosurfactants from Pb4 and Th1 might belong to glycolipid or glycolipopeptide class whereas the biosurfactants from S2i could be from phospholipid class. Scanning electron micrographs exhibited group of exopolymer matrices interconnecting the cells forming a complex network of mass, while energy dispersive X-ray analysis has shown elemental composition of biosurfactants with dominance of nitrogen, carbon, oxygen, and phosphorous. Further, these strains were then used to ascertain their effect on the growth and biochemical parameters including stress metabolites and antioxidant enzymology of Zea mays L. plants grown under petrol (gasoline) stress. Significant increments in all studied parameters were observed in comparison with control treatments that might be due to petrol degradation by bacteria and also by secreting growth stimulating substances released by these bacteria in soil ecosystem. To the best of our knowledge, this is the first report in which Pb4 and Th1 were studied as surfactant producing PGPR and further their role as biofertilizer for the significant improvement in phytochemical constituents of maize plants grown under petrol stress was assessed.
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Affiliation(s)
- Sabiha Habib
- Institute of Botany, University of the Punjab, Quaid-E-Azam Campus, Lahore, 54590, Pakistan
| | - Ambreen Ahmed
- Institute of Botany, University of the Punjab, Quaid-E-Azam Campus, Lahore, 54590, Pakistan.
| | - Muhammad Farhan Ul Haque
- School of Biological Sciences, University of the Punjab, Quaid-E-Azam Campus, Lahore, 54590, Pakistan
| | - Rabia Ejaz
- School of Biological Sciences, University of the Punjab, Quaid-E-Azam Campus, Lahore, 54590, Pakistan
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Gupta KK, Sharma KK, Chandra H. Utilization of Bacillus cereus strain CGK5 associated with cow feces in the degradation of commercially available high-density polyethylene (HDPE). Arch Microbiol 2023; 205:101. [PMID: 36862211 DOI: 10.1007/s00203-023-03448-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2022] [Revised: 12/13/2022] [Accepted: 02/21/2023] [Indexed: 03/03/2023]
Abstract
The accumulation and mismanagement of high-density polyethylene (HDPE) waste in the environment is a complex problem in the present scenario. Biodegradation of this thermoplastic polymer is a promising environmentally sustainable method that offers a significant opportunity to address plastic waste management with minimal negative repercussion on the environment. In this framework, HDPE-degrading bacterium strain CGK5 was isolated from the fecal matter of cow. The biodegradation efficiency of strain was assessed, including percentage reduction in HDPE weight, cell surface hydrophobicity, extracellular biosurfactant production, viability of surface adhered cells, as well as biomass in terms of protein content. Through molecular techniques, strain CGK5 was identified as Bacillus cereus. Significant weight loss of 1.83% was observed in the HDPE film treated with strain CGK5 for 90 days. The FE-SEM analysis revealed the profused bacterial growth which ultimately caused the distortions in HDPE films. Furthermore, EDX study indicated a significant decrease in percentage carbon content at atomic level, whereas FTIR analysis confirmed chemical groups' transformation as well as an increment in the carbonyl index supposedly caused by bacterial biofilm biodegradation. Our findings shed light on the ability of our strain B. cereus CGK5 to colonize and use HDPE as a sole carbon source, demonstrating its applicability for future eco-friendly biodegradation processes.
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Affiliation(s)
- Kartikey Kumar Gupta
- Department of Botany and Microbiology, Gurukula Kangri (Deemed to be University), Uttarakhand, Haridwar, India
| | - Kamal Kant Sharma
- Department of Botany and Microbiology, Gurukula Kangri (Deemed to be University), Uttarakhand, Haridwar, India.
| | - Harish Chandra
- Department of Botany and Microbiology, Gurukula Kangri (Deemed to be University), Uttarakhand, Haridwar, India
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Uyar E, Avcı T. Screening and molecular identification of biosurfactant/bioemulsifier producing bacteria from crude oil contaminated soils samples. Biologia (Bratisl) 2023. [DOI: 10.1007/s11756-023-01330-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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