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Jeyaram K, Murugan D, Velmurugan S, Prabhu AA, Raja S, Bose SA, Balakrishnan D. Investigation of the influence of Candida tropicalis on bioethanol production using sugarcane bagasse: stochastic and in silico analysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024:10.1007/s11356-024-34226-5. [PMID: 38987518 DOI: 10.1007/s11356-024-34226-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 06/30/2024] [Indexed: 07/12/2024]
Abstract
This study investigated the impact of Candida tropicalis NITCSK13 on sugarcane bagasse (SCB) consolidated bioprocessing (CSB) using various parameters, such as pH, steam explosion (STEX) pretreatment, and temperature (at two different temperatures, cellulose hydrolysis and ethanol fermentation). The backpropagation neural network (BPNN) method simulated the optimal CSB conditions, achieving a maximum ethanol yield of 44 ± 0.32 g/L (0.443 g of ethanol/g of SCB) from STEX pretreated SCB within 48 h at 55 °C for cellulose hydrolysis and 33 °C for ethanol fermentation and pH 3.5. The simulated conditions were experimentally validated and showed an R2 value of 0.998 and absolute average deviation (AAD) of 1.23%. The strain NITCSK13 also exhibited a high ethanol tolerance of 16% (v/v). The interactions between the inhibitors, cellobiose, furfural, and thermocellulase were assessed through molecular docking. The results revealed a maximum inhibitory constant of 3.7 mM for furfural against the endoglucanase (EnG) of Humicola insolens (2ENG) at 50 °C. Acremonium chrysogenum endoglucanase (5M2D) exhibited a maximum of 88.7 µM for cellobiose at 50 °C. The SWISS homology model of EnG from Candida viswanathii exhibited inhibitory effects similar to those of EnG from Thermoascus and Thermotoga, indicating that the moderately thermophilic yeast Candida sp. cellulase may be capable of efficiently tolerating inhibitors and could be a promising candidate for consolidated bioprocessing of cellulosic ethanol.
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Affiliation(s)
- Kanimozhi Jeyaram
- Department of Biotechnology, School of Bio, Chemical and Processing Engineering, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, India.
| | - Dharanidharan Murugan
- Department of Biotechnology, School of Bio, Chemical and Processing Engineering, Kalasalingam Academy of Research and Education, Krishnankoil, Tamil Nadu, India
| | | | - Ashish A Prabhu
- Department of Biotechnology, National Institute of Technology, Warangal, Telangana, India
| | - Sivashankar Raja
- Department of Biotechnology, Vel Tech Dr Rangarajan Dr Sagunthala R&D Institute of Science and Technology, Chennai, Tamilnadu, India
| | - Sathya A Bose
- Department of Biotechnology, Saveetha School of Engineering, Saveetha Institute of Medical and Technical Sciences, Chennai, India
| | - Deepanraj Balakrishnan
- Department of Mechanical Engineering, College of Engineering, Prince Mohammad Bin Fahd University, Al-Khobar, Saudi Arabia
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Chancharoenthana W, Kamolratanakul S, Visitchanakun P, Sontidejkul S, Cheibchalard T, Somboonna N, Settachaimongkon S, Leelahavanichkul A. Lacticaseibacilli attenuated fecal dysbiosis and metabolome changes in Candida-administered bilateral nephrectomy mice. Front Immunol 2023; 14:1131447. [PMID: 36969207 PMCID: PMC10034098 DOI: 10.3389/fimmu.2023.1131447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 02/27/2023] [Indexed: 03/11/2023] Open
Abstract
The impacts of metabolomic changes (reduced short-chain-fatty acids; SCFAs) in uremic condition is not fully understood. Once daily Candida gavage with or without probiotics (different times of administration) for 1 week prior to bilateral nephrectomy (Bil Nep) in 8-week-old C57BL6 mice as the possible models more resemble human conditions were performed. Candida-administered Bil Nep mice demonstrated more severe conditions than Bil Nep alone as indicated by mortality (n = 10/group) and other 48 h parameters (n = 6-8/group), including serum cytokines, leaky gut (FITC-dextran assay, endotoxemia, serum beta-glucan, and loss of Zona-occludens-1), and dysbiosis (increased Enterobacteriaceae with decreased diversity in microbiome analysis) (n = 3/group for fecal microbiome) without the difference in uremia (serum creatinine). With nuclear magnetic resonance metabolome analysis (n = 3-5/group), Bil Nep reduced fecal butyric (and propionic) acid and blood 3-hydroxy butyrate compared with sham and Candida-Bil Nep altered metabolomic patterns compared with Bil Nep alone. Then, Lacticaseibacillus rhamnosus dfa1 (SCFA-producing Lacticaseibacilli) (n = 8/group) attenuated the model severity (mortality, leaky gut, serum cytokines, and increased fecal butyrate) of Bil Nep mice (n = 6/group) (regardless of Candida). In enterocytes (Caco-2 cells), butyrate attenuated injury induced by indoxyl sulfate (a gut-derived uremic toxin) as indicated by transepithelial electrical resistance, supernatant IL-8, NFκB expression, and cell energy status (mitochondria and glycolysis activities by extracellular flux analysis). In conclusion, the reduced butyrate by uremia was not enhanced by Candida administration; however, the presence of Candida in the gut induced a leaky gut that was attenuated by SCFA-producing probiotics. Our data support the use of probiotics in uremia.
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Affiliation(s)
- Wiwat Chancharoenthana
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Tropical Immunology and Translational Research Unit (TITRU), Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- *Correspondence: Wiwat Chancharoenthana, ; Asada Leelahavanichkul,
| | - Supitcha Kamolratanakul
- Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
- Tropical Immunology and Translational Research Unit (TITRU), Department of Clinical Tropical Medicine, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Peerapat Visitchanakun
- Center of Excellence on Translational Research in Inflammatory and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok, Thailand
| | - Supistha Sontidejkul
- Center of Excellence on Translational Research in Inflammatory and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok, Thailand
| | - Thanya Cheibchalard
- Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Naraporn Somboonna
- Department of Microbiology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
- Microbiome Research Unit for Probiotics in Food and Cosmetics, Chulalongkorn University, Bangkok, Thailand
| | - Sarn Settachaimongkon
- Department of Food Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
| | - Asada Leelahavanichkul
- Center of Excellence on Translational Research in Inflammatory and Immunology (CETRII), Department of Microbiology, Chulalongkorn University, Bangkok, Thailand
- *Correspondence: Wiwat Chancharoenthana, ; Asada Leelahavanichkul,
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Das T, Ali F, Rahman MS. Cellulase activity of a novel bacterial strain Arthrobacter woluwensis TDS9: its application on bioconversion of paper mill sludge. J Genet Eng Biotechnol 2022; 20:87. [PMID: 35708781 PMCID: PMC9203635 DOI: 10.1186/s43141-022-00373-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 05/24/2022] [Indexed: 01/08/2023]
Abstract
Background Lignocellulosic biomasses produced from agriculture and forest-based industries are the cheapest or negative-cost biomass with a great potential for biotransformation to value-added bioproducts. Paper mill sludge, an important lignocellulosic biomass creates an environmental threat, which requires financial input for disposal. Thus, this study was aimed to isolate a novel bacterial strain capable of degrading cellulosic biomass including paper mill sludge to produce reducing sugar and other value-added bioproducts. Results A novel bacterial strain Arthrobacter woluwensis TDS9 isolated from the soil was screened for its cellulolytic activity using carboxymethyl cellulose (CMC) as the sole carbon source. The incubation period, temperature, pH, carbon, and nitrogen sources are the most important factors ruling the CMCase and sugar productions of the strain A. woluwensis TDS9, and an alkaline pH (pH 8.0) led to enhanced sugar production up to 1100.09 μg/mL after 72 h of incubation at 25°C in a medium containing 1.5% CMC and 1.25% beef extract. The optimal conditions for maximum CMCase activity were defined, and the potassium ion boosted the CMCase activity up to 1.06 U/mL when the enzymatic reaction was performed for 30 min at 50°C and pH 8 using CMC as a substrate. Moreover, the strain A. woluwensis TDS9 produced 433.33 μg/mL reducing sugar from 1% pretreated paper mill sludge. Significant alterations in the structural arrangement of cellulosic fiber of paper mill sludge observed under microscope after each step of chemical treatment process helped for loosening the cellulose fibers and increased the saccharification for enzymatic hydrolysis. Endoglucanase IV (33 KDa) and beta-glucosidase II (53 KDa) were identified in crude enzyme based on the zymogram analysis and substrate specificity. Conclusions The research has for the first time proved that this A. woluwensis TDS9 strain can efficiently convert cellulose. Therefore, the strain TDS9 could be a potential candidate for cellulase production in an industrial biotransformation process of paper mill sludge to produce reducing sugar. This sugar stream can be further used as a substrate to produce biofuels and other organic acids using another microorganism, which represents a greener alternative to add value to the paper production helping paper mill industries.
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Affiliation(s)
- Tuhin Das
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh
| | - Ferdausi Ali
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh
| | - Md Shafiqur Rahman
- Department of Microbiology, University of Chittagong, Chattogram, 4331, Bangladesh. .,Department of Biology, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario, Canada.
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Scheffer G, Rachel NM, Ng KK, Sen A, Gieg LM. Preparation and identification of carboxymethyl cellulose-degrading enzyme candidates for oilfield applications. J Biotechnol 2022; 347:18-25. [DOI: 10.1016/j.jbiotec.2022.02.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 01/21/2022] [Accepted: 02/01/2022] [Indexed: 11/28/2022]
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Lucero CT, Lorda GS, Anzuay MS, Ludueña LM, Taurian T. Peanut Endophytic Phosphate Solubilizing Bacteria Increase Growth and P Content of Soybean and Maize Plants. Curr Microbiol 2021; 78:1961-1972. [PMID: 33839883 DOI: 10.1007/s00284-021-02469-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 03/17/2021] [Indexed: 10/21/2022]
Abstract
Phosphorus (P) is a limiting factor of plant development due to its low availability in the soil. The use of endophytic phosphate solubilizing bacteria as a more sustainable alternative to the use of chemical phosphorus fertilizers is proposed in this study. The objectives were to analyze the effect of simple inoculations of native peanut endophytic phosphate solubilizing bacteria on plant growth promotion and P content of soybean and maize and to evaluate their survival and endophytic colonization capacity on these plants. In addition, bacterial plant cell wall degrading enzymes activities in presence or absence of root exudates was determined. Soybean, maize and peanut plants were grown on a microcosm scale and inoculated with Enterobacter sp. J49 or Serratia sp. S119. It was observed that phosphate solubilizing strains promoted the growth of maize and soybean plants and contributed significantly P to their tissues. A significant increase in the phosphate solubilizing capacity of the plant rhizosphere after the end of the assay was observed. The strains showed to survive in plant's growth substrate and in the case of Enterobacter sp. J49, it showed also to colonize endophytically maize and soybean. Root exudates of the three plants showed to produce changes in pectinase and cellulase activities of the strains. The bacterial strains analyzed in this study constitutes potential sources for the formulation of biofertilizers for their application for several crops in agricultural soils with low P content.
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Affiliation(s)
- Cinthia Tamara Lucero
- Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Ruta Nacional 35 km 330, CP 6300, Santa Rosa, Provincia de La Pampa, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET), Buenos Aires, Argentina
| | - Graciela Susana Lorda
- Departamento de Química, Facultad de Ciencias Exactas y Naturales, Universidad Nacional de La Pampa, Ruta Nacional 35 km 330, CP 6300, Santa Rosa, Provincia de La Pampa, Argentina
| | - María Soledad Anzuay
- Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 km 601, Agencia Postal 3, 5800, Río Cuarto, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET), Buenos Aires, Argentina
- Instituto de Investigaciones Agrobiotecnológicas (INIAB), Río Cuarto, Argentina
| | - Liliana Mercedes Ludueña
- Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 km 601, Agencia Postal 3, 5800, Río Cuarto, Córdoba, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET), Buenos Aires, Argentina
- Instituto de Investigaciones Agrobiotecnológicas (INIAB), Río Cuarto, Argentina
| | - Tania Taurian
- Departamento de Ciencias Naturales, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Ruta 36 km 601, Agencia Postal 3, 5800, Río Cuarto, Córdoba, Argentina.
- Consejo Nacional de Investigaciones Científicas y Técnicas de la República Argentina (CONICET), Buenos Aires, Argentina.
- Instituto de Investigaciones Agrobiotecnológicas (INIAB), Río Cuarto, Argentina.
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Scheffer G, Berdugo‐Clavijo C, Sen A, Gieg LM. Enzyme biotechnology development for treating polymers in hydraulic fracturing operations. Microb Biotechnol 2021; 14:953-966. [PMID: 33428324 PMCID: PMC8085988 DOI: 10.1111/1751-7915.13727] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 11/22/2020] [Indexed: 01/04/2023] Open
Abstract
Carboxymethyl cellulose (CMC) is a polymer used in many different industrial sectors. In the oil and gas industry, CMC is often used during hydraulic fracturing (fracking) operations as a thickening agent for effective proppant delivery. Accumulations of CMC at fracture faces (known as filter cakes) can impede oil and gas recovery. Although chemical oxidizers are added to disrupt these accumulations, there is industrial interest in developing alternative, enzyme-based treatments. Little is known about CMC biodegradation under fracking conditions. Here, we enriched a methanogenic CMC-degrading culture and demonstrated its ability to enzymatically utilize CMC under the conditions that typify oil fields. Using the extracellular enzyme fraction from the culture, significant CMC viscosity reduction was observed between 50 and 80˚C, at salinities up to 20% (w/v) and at pH 5-8 compared to controls. Similar levels of viscosity reduction by extracellular enzymes were observed under oxic and anoxic conditions. This proof-of-concept study demonstrates that enzyme biotechnology holds great promise as a viable approach to treating CMC filter cakes under oilfield conditions.
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Affiliation(s)
| | | | - Arindom Sen
- Department of Chemical and Petroleum EngineeringSchulich School of EngineeringUniversity of CalgaryCalgaryABCanada
| | - Lisa M. Gieg
- Department of Biological SciencesUniversity of CalgaryCalgaryABCanada
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Karthika A, Seenivasagan R, Kasimani R, Babalola OO, Vasanthy M. Cellulolytic bacteria isolation, screening and optimization of enzyme production from vermicompost of paper cup waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2020; 116:58-65. [PMID: 32784122 DOI: 10.1016/j.wasman.2020.06.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Revised: 06/14/2020] [Accepted: 06/25/2020] [Indexed: 06/11/2023]
Abstract
In the current scenario, used paper cups are disposed of without any proper treatment, thereby damaging the environment. Hence, the vermicomposting technique is preferred for managing these wastes. The ability of bacterial strains on cellulase enzyme (Endoglucanase, exoglucanase and β-glucosidase) production at altered pH and temperatures were focused in this study. Among nine bacterial strains Acinetobacter baumannii was found to have high enzyme activity. HPLC analysis confirms that about 45% of cellulose degradation occurred due to the action of bacterial consortia at 37 °C with pH 7. The overall period required for degradation takes only three months with the help of bacterial consortia while comparing to our previous study, which takes six months. The insilico study on three cellulose-degrading enzymes sequence were retrieved from NCBI, and analysed for multiple sequence alignment and phylogenetic tree construction. From the analysis, the endoglucanase SVK46152 (Acinetobacter baumannii) sequence got docked with cellopentaose with a high score value -11.07. Thereby we confirm that organism Acinetobacter baumannii was effective in paper cup degradation.
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Affiliation(s)
- A Karthika
- Department of Microbiology, Standard Fireworks Rajaratnam College for Women, Sivakasi 626123, Tamil Nadu, India; Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India
| | - R Seenivasagan
- Department of Biotechnology, Kalasalingam Academy of Research and Education, Krishnankoil 626126, Tamil Nadu, India; Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho 2735, South Africa
| | - R Kasimani
- Department of Microbiology, Nehru Arts and Science College, Coimbatore 641105, Tamil Nadu, India
| | - O O Babalola
- Food Security and Safety Niche Area, Faculty of Natural and Agricultural Sciences, North-West University, Mmabatho 2735, South Africa
| | - M Vasanthy
- Department of Environmental Biotechnology, Bharathidasan University, Tiruchirappalli 620024, Tamil Nadu, India.
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Yu C, Luo Q, Chen Y, Liu S, Zang C. Impact of docusate and fauna-free on feed intake, ruminal flora and digestive enzyme activities of sheep. J Anim Physiol Anim Nutr (Berl) 2020; 104:1043-1051. [PMID: 32383244 PMCID: PMC7383821 DOI: 10.1111/jpn.13382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 04/01/2020] [Accepted: 04/02/2020] [Indexed: 11/29/2022]
Abstract
Four Small‐tail Han male hogget sheep, fitted with rumen cannula and fed the same basal diet were used to study the impacts of docusate (DOC) and fauna‐free on the voluntary feed intake (VFI), and ruminal protozoal, bacterial and fungal counts and the digestive enzyme activities. By a 4 × 4 Latin square design, sheep were given no DOC (the control), 2 doses of DOC: 1.2 and 3.0 g/kg diet or oral dose of 6.0 g/d DOC for three days (fauna‐free treatment) in each period of 18 days, the last three days of which were for sampling the rumen fluid. Compared with the control, 1.2 g/kg of DOC supplementation significantly resulted in increases of 18.0% VFI and 44% bacterial count, and no significant change in the fungal number. Supplementing DOC reduced protozoal number in a dose‐dependent manner. The fibre degradation enzyme activity in rumen fluid increased by 17.7% with a concomitant 10% increase in volatile fatty acids (VFA); the protease activity was reduced by 23% with a corresponding reduction in rumen ammonia by 42%. In contrast, supplementing 3.0 g/kg of DOC has adverse effects on those measures compared with 1.2 g/kg of DOC. Defaunation was accompanied with substantial increases in the bacterial and fungal counts, but had no significant influences on VFI and the enzyme activity for starch, protein and pectin digestion, and small changes in fibre digestion enzymes and the total VFA compared with the control. A high correlation (r2 = 0.82) was noted between VFI and the total activity of fibre digestion enzymes and VFA. It was proposed that fibre digestion rate in the rumen is a primary factor for determining VFI in sheep, and dietary supplementation of 1.2 g/kg of DOC could partially result in enhanced activity of fibre digestive enzyme in the rumen and increase VFI.
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Affiliation(s)
- Chucai Yu
- Laboratory of Animal Nutrition, College of Animal Science, Xinjiang Agricultural University, Urumqi, China
| | - Qiujiang Luo
- Laboratory of Animal Nutrition, College of Animal Science, Xinjiang Agricultural University, Urumqi, China
| | - Yong Chen
- Laboratory of Animal Nutrition, College of Animal Science, Xinjiang Agricultural University, Urumqi, China
| | - Shimin Liu
- UWA Institute of Agriculture, The University of Western Australia, Crawley, WA, Australia
| | - Changjiang Zang
- Laboratory of Animal Nutrition, College of Animal Science, Xinjiang Agricultural University, Urumqi, China
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Characterization and Identification of Cellulose-degrading Bacteria Isolated from a Microbial Fuel Cell Reactor. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-019-0089-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Shakarami MH, Mohammadabadi T, Motamedi H, Sari M, Teimouri Yansari A. Isolation and identification of cellulolytic bacteria from gastrointestinal tract of Arabian horse and investigation of their effect on the nutritional value of wheat straw. J Appl Microbiol 2019; 127:344-353. [DOI: 10.1111/jam.14251] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 02/22/2019] [Accepted: 03/06/2019] [Indexed: 11/28/2022]
Affiliation(s)
- M. Harsini Shakarami
- Department of Animal Science Faculty of Animal Science and Food Technology Agricultural Sciences and Natural Resources University of Khuzestan Mollasani, Ahvaz Iran
| | - T. Mohammadabadi
- Department of Animal Science Faculty of Animal Science and Food Technology Agricultural Sciences and Natural Resources University of Khuzestan Mollasani, Ahvaz Iran
| | - H. Motamedi
- Department of Biology Faculty of Science Shahid Chamran University of Ahvaz Khuzestan Iran
- Biotechnology and Biological Science Research Center Shahid Chamran University of Ahvaz Khuzestan Iran
| | - M. Sari
- Department of Animal Science Faculty of Animal Science and Food Technology Agricultural Sciences and Natural Resources University of Khuzestan Mollasani, Ahvaz Iran
| | - A. Teimouri Yansari
- Department of Animal Science Faculty of Animal Science and Fisheries Sari Agricultural Sciences and Natural Resources University Sari Iran
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Duckweed (Lemna minor) is a novel natural inducer of cellulase production in Trichoderma reesei. J Biosci Bioeng 2018; 127:486-491. [PMID: 30366719 DOI: 10.1016/j.jbiosc.2018.09.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2018] [Revised: 08/13/2018] [Accepted: 09/26/2018] [Indexed: 02/03/2023]
Abstract
An inducer is crucial for cellulase production. In this study, duckweed was used as an inducer of cellulase production by Trichoderma reesei RUT C30. In a reaction induced by 50 g/L duckweed in shake flasks, the filter-paper activity (FPA) reached 6.5 FPU/mL, a value comparable to that induced by avicel. The enzyme-hydrolysis rate induced by steam-exploded corn stalk was 54.2%, representing a 28% improvement over that induced by avicel. The duckweed starch was hydrolyzed to glucose, which was subsequently used for biomass accumulation during the fermentation process. Furthermore, to optimize the control of the fermentation process, a combined substrate of avicel and duckweed was used to induce cellulase production by T. reesei RUT C30. The cellulase production and hydrolysis rates of the combined substrate, compared with avicel alone, were 39.6% and 36.7% higher, respectively. The results of this study suggest that duckweed is a good inducer of cellulase production in T. reesei, and it might aid in decreasing the cost of lignocellulosic materials hydrolysis.
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Sari WN, Safika, Darmawi, Fahrimal Y. Isolation and identification of a cellulolytic Enterobacter from rumen of Aceh cattle. Vet World 2017; 10:1515-1520. [PMID: 29391695 PMCID: PMC5771179 DOI: 10.14202/vetworld.2017.1515-1520] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 11/24/2017] [Indexed: 11/16/2022] Open
Abstract
Aims: The aim of this study was to isolate and identify a cellulolytic bacterium from the rumen fluid of Aceh’s cattle. Biodegradation by cellulolytic rumen bacteria can be used as a source of cellulolytic bacteria that act to degrade feed fibrous material so as to improve the quality of nutrients and digestibility of feed ingredients at a cheaper price than the use of commercial cellulase enzymes. Materials and Methods: Samples were collected from rumen fluid of Aceh’s cattle in Abattoirs (RPH) of Banda Aceh city, Indonesia, isolation, and screening of cellulolytic bacteria were done in Microbiology Laboratory, Faculty of Veterinary Medicine, Syiah Kuala University, Banda Aceh, Indonesia. Results: The S1 isolates showed ±2.5 cm of clear zone diameter. Microscopically, this strain was found to be a Gram-negative, Bacillus. Homology and phylogenetic tree analysis of 16S rRNA showed that S1 isolate has 91% of sequence similarity with that of Enterobacter cloacae. 91% sequence homology shown in this study proved that the S1 isolate is probably either a new species or another genus of Enterobacteriaceae. Conclusion: Current study suggests that cellulose hydrolytic bacteria isolated from rumen fluid of Aceh cattle on Bushnell Haas medium-carboxymethylcellulose agar, and some potent cellulose degrading bacteria have been identified.
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Affiliation(s)
- Wenny Novita Sari
- Postgraduate student of Mathematics and Applied Sciences, Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia
| | - Safika
- Department of Veterinary Infectious Diseases and Veterinary Public Health, Faculty of Veterinary Medicine, Bogor Agricultural University, Jalan Agatis IPB, Darmaga, Bogor, Indonesia
| | - Darmawi
- Microbiology Laboratory, Faculty of Veterinary Medicine, Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia
| | - Yudha Fahrimal
- Parasitology Laboratory, Faculty of Veterinary, Syiah Kuala University, Darussalam, Banda Aceh 23111, Indonesia
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Sherpa KC, Ghangrekar MM, Banerjee R. Optimization of saccharification of enzymatically pretreated sugarcane tops by response surface methodology for ethanol production. BIOFUELS-UK 2017. [DOI: 10.1080/17597269.2017.1409058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Knawang Chhunji Sherpa
- Advanced Technology Development Centre, Indian Institute of Technology, Kharagpur -721302, India
| | | | - Rintu Banerjee
- Agricultural and Food Engineering Department, Indian Institute of Technology, Kharagpur -721302, India
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Pang J, Liu ZY, Hao M, Zhang YF, Qi QS. An isolated cellulolytic Escherichia coli from bovine rumen produces ethanol and hydrogen from corn straw. BIOTECHNOLOGY FOR BIOFUELS 2017; 10:165. [PMID: 28652866 PMCID: PMC5483281 DOI: 10.1186/s13068-017-0852-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Accepted: 06/16/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Lignocellulosic biomass is the most abundant resource on earth. Lignocellulose is mainly composed of cellulose, hemicelluloses, and lignin. The special construction of three kinds of constituents led to the prevention of effective degradation. The goal of this work was to investigate the great potentials of bovine rumen for novel cellulolytic bacterial isolation, which may be used for chemicals and biofuel production from lignocellulose. RESULTS A cellulolytic strain, ZH-4, was isolated from Inner Mongolia bovine rumen. This strain was identified as Escherichia coli by morphological, physiological, and biochemical characteristics and 16S rDNA gene sequencing. The extracellular enzyme activity analysis showed that this strain produces extracellular cellulases with an exoglucanase activity of 9.13 IU, an endoglucanase activity of 5.31 IU, and a β-glucosidase activity of 7.27 IU at the pH 6.8. This strain was found to produce 0.36 g/L ethanol and 4.71 mL/g hydrogen from corn straw with cellulose degradation ratio of 14.30% and hemicellulose degradation ratio of 11.39%. CONCLUSIONS It is the first time that a cellulolytic E. coli was isolated and characterized form the bovine rumen. This provided a great opportunity for researchers to investigate the evolution mechanisms of the microorganisms in the rumen and provided great chance to produce biofuels and chemicals directly from engineered E. coli using consolidated bioprocess.
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Affiliation(s)
- Jian Pang
- School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051 Inner Mongolia China
| | - Zhan-Ying Liu
- School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051 Inner Mongolia China
| | - Min Hao
- School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051 Inner Mongolia China
| | - Yong-Feng Zhang
- School of Chemical Engineering, Inner Mongolia University of Technology, Hohhot, 010051 Inner Mongolia China
- Institute of Coal Conversion & Cyclic Economy, Inner Mongolia University of Technology, Hohhot, 010051 Inner Mongolia China
| | - Qing-Sheng Qi
- State Key Laboratory of Microbial Technology, Shandong University, Jinan, 250100 China
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