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Aasfar A, Meftah Kadmiri I, Azaroual SE, Lemriss S, Mernissi NE, Bargaz A, Zeroual Y, Hilali A. Agronomic advantage of bacterial biological nitrogen fixation on wheat plant growth under contrasting nitrogen and phosphorus regimes. FRONTIERS IN PLANT SCIENCE 2024; 15:1388775. [PMID: 38779073 PMCID: PMC11109382 DOI: 10.3389/fpls.2024.1388775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 04/16/2024] [Indexed: 05/25/2024]
Abstract
Introduction Given their remarkable capacity to convert atmospheric nitrogen into plant-accessible ammonia, nitrogen-fixing microbial species hold promise as a sustainable alternative to chemical nitrogen fertilizers, particularly in economically significant crops like wheat. This study aimed to identify strains with optimal attributes for promoting wheat growth sustainably, with a primary emphasis on reducing reliance on chemical nitrogen fertilizers. Methods We isolated free nitrogen-fixing strains from diverse rhizospheric soils across Morocco. Subsequently, we conducted a rigorous screening process to evaluate their plant growth-promoting traits, including nitrogen fixation, phosphate solubilization, phytohormone production and their ability to enhance wheat plant growth under controlled conditions. Two specific strains, Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528, were selected for in-depth evaluation, with the focus on their ability to reduce the need for chemical nitrogen supply, particularly when used in conjunction with TSP fertilizer and natural rock phosphate. These two sources of phosphate were chosen to assess their agricultural effectiveness on wheat plants. Results and discussion Twenty-two nitrogen-fixing strains (nif-H+) were isolated from various Moroccan rhizospheric soils, representing Bacillus sp., Pseudomonas sp., Arthrobacter sp., Burkholderia sp. and a yeast-like microorganism. These strains were carefully selected based on their potential to promote plant growth. The findings revealed that the application of Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528 individually or in combination, significantly improved wheat plant growth and enhanced nutrients (N and P) uptake under reduced nitrogen regimes. Notably, their effectiveness was evident in response to both natural rock phosphate and TSP, demonstrating their important role in wheat production under conditions of low nitrogen and complex phosphorus inputs. This research underscores the significant role of nitrogen-fixing microorganisms, particularly Rhodotorula mucilaginosa NF 516 and Arthrobacter sp. NF 528, in wheat production under conditions of low nitrogen and complex phosphorus inputs. It showcases their potential to reduce chemical nitrogen fertilization requirements by up to 50% without compromising wheat plant yields. Our study emphasizes the importance of bacterial biological nitrogen fixation in meeting the remaining nitrogen requirements beyond this reduction. This underscores the vital role of microbial contributions in providing essential nitrogen for optimal plant growth and highlights the significance of biological nitrogen fixation in sustainable agriculture practices.
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Affiliation(s)
- Abderrahim Aasfar
- Plant and Microbial Biotechnology Center, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Mohammed VI Polytechnic University, Ben Guerir, Morocco
- Laboratory of Health Sciences and Technologies, High Institute of Health Sciences, Hassan 1st University, Settat, Morocco
| | - Issam Meftah Kadmiri
- Plant and Microbial Biotechnology Center, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Mohammed VI Polytechnic University, Ben Guerir, Morocco
| | - Salah Eddine Azaroual
- Plant and Microbial Biotechnology Center, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Mohammed VI Polytechnic University, Ben Guerir, Morocco
| | - Sanaâ Lemriss
- Department of Biosecurity PCL3, Laboratory of Research and Medical Analysis of Gendarmerie Royale, Rabat, Morocco
| | - Najib El Mernissi
- Plant and Microbial Biotechnology Center, Moroccan Foundation for Advanced Science, Innovation and Research (MAScIR), Mohammed VI Polytechnic University, Ben Guerir, Morocco
| | - Adnane Bargaz
- AgroBioSciences, College of Agriculture and Environmental Sciences, Mohammed VI Polytechnic University, Ben Guerir, Morocco
| | - Youssef Zeroual
- Situation Innovation Group–Office Chérifien des Phosphates (OCP Group), Jorf Lasfar, Morocco
| | - Abderraouf Hilali
- Laboratory of Health Sciences and Technologies, High Institute of Health Sciences, Hassan 1st University, Settat, Morocco
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Show S, Akhter R, Paul I, Das P, Bal M, Bhattacharya R, Bose D, Mondal A, Saha S, Halder G. Efficacy of exopolysaccharide in dye-laden wastewater treatment: A comprehensive review. CHEMOSPHERE 2024; 355:141753. [PMID: 38531498 DOI: 10.1016/j.chemosphere.2024.141753] [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: 12/06/2023] [Revised: 03/12/2024] [Accepted: 03/16/2024] [Indexed: 03/28/2024]
Abstract
The discharge of dye-laden wastewater into the water streams causes severe water and soil pollution, which poses a global threat to aquatic ecosystems and humans. A diverse array of microorganisms such as bacteria, fungi, and algae produce exopolysaccharides (EPS) of different compositions and exhibit great bioflocculation potency to sustainably eradicate dyes from water bodies. Nanomodified chemical composites of EPS enable their recyclability during dye-laden wastewater treatment. Nevertheless, the selection of potent EPS-producing strains and physiological parameters of microbial growth and the remediation process could influence the removal efficiency of EPS. This review will intrinsically discuss the fundamental importance of EPS from diverse microbial origins and their nanomodified chemical composites, the mechanisms in EPS-mediated bioremediation of dyes, and the parametric influences on EPS-mediated dye removal through sorption/bioflocculation. This review will pave the way for designing and adopting futuristic green and sustainable EPS-based bioremediation strategies for dye-laden wastewater in situ and ex situ.
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Affiliation(s)
- Sumona Show
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, 713209, West Bengal, India
| | - Ramisa Akhter
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur, 713209, West Bengal, India
| | - Indrani Paul
- Department of Biotechnology, Brainware University, Barasat, Kolkata, 700125, West Bengal, India
| | - Payal Das
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, 713209, West Bengal, India
| | - Manisha Bal
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, 713209, West Bengal, India
| | - Riya Bhattacharya
- School of Biotechnology, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, Himachal Pradesh, India
| | - Debajyoti Bose
- School of Biotechnology, Shoolini University of Biotechnology and Management Sciences, Solan, 173229, Himachal Pradesh, India
| | - Amita Mondal
- Department of Chemistry, Vedanta College, Kolkata, 700054, West Bengal, India
| | - Shouvik Saha
- Department of Biotechnology, Brainware University, Barasat, Kolkata, 700125, West Bengal, India.
| | - Gopinath Halder
- Department of Chemical Engineering, National Institute of Technology Durgapur, Durgapur, 713209, West Bengal, India.
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El Fakhouri K, Ramdani C, Aasfar A, Boulamtat R, Sijilmassi B, El Bouhssini M, Kadmiri IM. Isolation, identification and pathogenicity of local entomopathogenic bacteria as biological control agents against the wild cochineal Dactylopius opuntiae (Cockerell) on cactus pear in Morocco. Sci Rep 2023; 13:21647. [PMID: 38062128 PMCID: PMC10703873 DOI: 10.1038/s41598-023-48976-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 12/02/2023] [Indexed: 12/18/2023] Open
Abstract
The Opuntia ficus-indica (L.) cactus, a crucial crop in Morocco, is threatened by the wild cochineal, Dactylopius opuntiae (Cockerell). The aim of this research was to investigate the efficacy of nine bacterial strains against both D. opuntiae nymphs and adults females applied individually or after black soap in the laboratory, greenhouse, and field conditions. Using the partial 16S ribosomal DNA, the bacterial isolates were identified as Pseudomonas koreensis, Pseudomonas sp., Burkholderia sp. and Bacillus sp. Under laboratory conditions, the insecticidal activity of P. koreensis strain 66Ms.04 showed the level mortality (88%) of adult females' at 108 CFU/mL, 7 days after application. At a concentration of 108 CFU/mL, P. koreensis strain 66Ms.04 and Pseudomonas sp. (strains 37 and 5) caused 100% nymphs mortality rate three days after application. Under greenhouse conditions, the use of P. koreensis strain 66Ms.04 at 108 CFU/mL following the application of black soap (60 g/L) demonstrated the maximum levels of females and nymphs' mortalities with 80 and 91.25%, respectively, after 8 days of treatment. In field conditions, the combined application of the P. koreensis strain 66Ms.04 at 108 CFU/mL with black soap at 60 g/L, for an interval of 7 days, significantly increased the mortality of adult females to 93.33% at 7 days after the second application. These findings showed that the combined treatment of P. koreensis strain 66Ms.04 with black soap can be a potent and eco-friendly pesticide against D. opuntiae.
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Affiliation(s)
- Karim El Fakhouri
- AgroBioSciences Program, College of Agriculture and Environmental Science, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Benguerir, Morocco.
| | - Chaimae Ramdani
- AgroBioSciences Program, College of Agriculture and Environmental Science, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Benguerir, Morocco
| | - Abderrahim Aasfar
- Plant and Microbial Biotechnology center, Moroccan Foundation for Advanced Science, Innovation and Rescarch (MAScIR), Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Benguerir, Morocco
| | - Rachid Boulamtat
- Entomology Laboratory, International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat Institutes, P.O. Box 6299, Rabat, Morocco
| | - Badreddine Sijilmassi
- Rhizobium Laboratory, Genetic Resources Section, International Center for Agricultural Research in the Dry Areas (ICARDA), Rabat Institutes, P.O. Box 6299, Rabat, Morocco
| | - Mustapha El Bouhssini
- AgroBioSciences Program, College of Agriculture and Environmental Science, Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Benguerir, Morocco
| | - Issam Meftah Kadmiri
- Plant and Microbial Biotechnology center, Moroccan Foundation for Advanced Science, Innovation and Rescarch (MAScIR), Mohammed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Benguerir, Morocco
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Gao J, Feng P, Zhang J, Dong C, Wang Z, Chen M, Yu Z, Zhao B, Hou X, Wang H, Wu Z, Jemim RS, Yu H, Sun D, Jing P, Chen J, Song W, Zhang X, Zhou Z, Wu J. Enhancing maize's nitrogen-fixing potential through ZmSBT3, a gene suppressing mucilage secretion. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2023; 65:2645-2659. [PMID: 37929676 DOI: 10.1111/jipb.13581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 11/04/2023] [Indexed: 11/07/2023]
Abstract
Maize (Zea mays) requires substantial amounts of nitrogen, posing a challenge for its cultivation. Recent work discovered that some ancient Mexican maize landraces harbored diazotrophic bacteria in mucilage secreted by their aerial roots. To see if this trait is retained in modern maize, we conducted a field study of aerial root mucilage (ARM) in 258 inbred lines. We observed that ARM secretion is common in modern maize, but the amount significantly varies, and only a few lines have retained the nitrogen-fixing traits found in ancient landraces. The mucilage of the high-ARM inbred line HN5-724 had high nitrogen-fixing enzyme activity and abundant diazotrophic bacteria. Our genome-wide association study identified 17 candidate genes associated with ARM across three environments. Knockouts of one candidate gene, the subtilase family gene ZmSBT3, confirmed that it negatively regulates ARM secretion. Notably, the ZmSBT3 knockout lines had increased biomass and total nitrogen accumulation under nitrogen-free culture conditions. High ARM was associated with three ZmSBT3 haplotypes that were gradually lost during maize domestication, being retained in only a few modern inbred lines such as HN5-724. In summary, our results identify ZmSBT3 as a potential tool for enhancing ARM, and thus nitrogen fixation, in maize.
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Affiliation(s)
- Jingyang Gao
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Peijiang Feng
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jingli Zhang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Chaopei Dong
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Zhao Wang
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Mingxiang Chen
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Zhongliang Yu
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Bowen Zhao
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Xin Hou
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Huijuan Wang
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Zhaokun Wu
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
| | - Razia Sultana Jemim
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Haidong Yu
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Doudou Sun
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Pei Jing
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jiafa Chen
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Weibin Song
- State Key Laboratory of Plant Physiology and Biochemistry, National Maize Improvement Center, College of Agronomy and Biotechnology, China Agricultural University, Beijing, 100193, China
| | - Xuecai Zhang
- International Maize and Wheat Improvement Center (CIMMYT), El Batan, Texcoco, 56237, Mexico
| | - Zijian Zhou
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
| | - Jianyu Wu
- College of Agronomy, State Key Laboratory of Wheat and Maize Crop Science, Henan Agricultural University, Zhengzhou, 450002, China
- College of Life Sciences, Henan Agricultural University, Zhengzhou, 450002, China
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Zhou L, Liu W, Duan H, Dong H, Li J, Zhang S, Zhang J, Ding S, Xu T, Guo B. Improved effects of combined application of nitrogen-fixing bacteria Azotobacter beijerinckii and microalgae Chlorella pyrenoidosa on wheat growth and saline-alkali soil quality. CHEMOSPHERE 2023; 313:137409. [PMID: 36457265 DOI: 10.1016/j.chemosphere.2022.137409] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Revised: 11/05/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Soil salinization seriously affects crop yield and soil productivity. The application of bacteria and microalgae has been considered as a promising strategy to alleviate soil salinization. However, the effect of bacteria-microalgae symbiosis on saline-alkali land is still unclear. This study evaluated the effects of Azotobacter beijerinckii, Chlorella pyrenoidosa, and their combined application on the wheat growth and saline-alkali soil improvement. The results showed that, among all the treatments, A. beijerinckii + live C. pyrenoidosa combined inoculation group (BA) had the best effect on increasing wheat plant biomass, improving salt tolerance, and improving soil fertility. The dry weight of wheat plant in the BA group increased by 66.7%, 17.4%, and 35.0%, respectively, compared with the control group (CK), A. beijerinckii inoculation group (B), and live C. pyrenoidosa inoculation group (A). The total nitrogen content of wheat plant in the BA group increased by 69.5%, 76.7%, and 71.1%, compared with the CK, B, and A group. The proline content of wheat plant in the BA group was 100% higher than that in the CK group. The N/P ratio and K/Na ratio of wheat plant increased by 157% and 12.9% in the BA group compared with the CK group, respectively, which was more conducive to alleviating nitrogen limitation and salt stress. The A. beijerinckii + live C. pyrenoidosa inoculation treatment better reduced soil pH and improved the availability of phosphorus in soil. This study illustrated the comprehensive application prospects of bacteria-microalgae interactions on wheat growth promotion and soil improvement in saline-alkali land, and provided a new effective strategy for improving saline-alkali soil quality and increasing crop productivity.
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Affiliation(s)
- Lixiu Zhou
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Wei Liu
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China.
| | - Huijie Duan
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Haiwen Dong
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Jingchao Li
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Shuxi Zhang
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Jing Zhang
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China
| | - Shigang Ding
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China
| | - Tongtong Xu
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China; Faculty of Environmental Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan 250353, China
| | - Beibei Guo
- Qilu University of Technology (Shandong Academy of Sciences), Shandong Analysis and Test Center, Jinan 250014, China
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Zhang P, Yuan L, Zeng J, Zou K, Liu B, Qing T, Feng B. Alginate production of Pseudomonas strains and its application in preparation of alginate-biomass hydrogel for heavy metal adsorption. Int J Biol Macromol 2022; 222:1511-1521. [DOI: 10.1016/j.ijbiomac.2022.09.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 09/21/2022] [Accepted: 09/27/2022] [Indexed: 11/29/2022]
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Hamidi M, Valentine Okoro O, Ianiri G, Jafari H, Rashidi K, Ghasemi S, Castoria R, Palmieri D, Delattre C, Pierre G, Mirzaei M, Nie L, Samadian H, Shavandi A. Exopolysaccharide from the yeast Papiliotrema terrestris PT22AV for skin wound healing. J Adv Res 2022; 46:61-74. [PMID: 35760297 PMCID: PMC10105244 DOI: 10.1016/j.jare.2022.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 06/09/2022] [Accepted: 06/21/2022] [Indexed: 11/27/2022] Open
Abstract
INTRODUCTION Exopolysaccharides (EPSs) are high-value functional biomaterials mainly produced by bacteria and fungi, with nutraceutical, therapeutic and industrial potentials. OBJECTIVES This study sought to characterize and assess the biological properties of the EPS produced by the yeast Papiliotrema terrestris PT22AV. METHODS After extracting the yeast's DNA and its molecular identification, the EPS from P. terrestris PT22AV strain was extracted and its physicochemical properties (structural, morphological, monosaccharide composition and molecular weight) were characterized. The EPS's in vitro biological activities and in vivo wound healing potential were also evaluated. RESULTS The obtained EPS was water-soluble and revealed an average molecular weight (Mw) of 202 kDa. Mannose and glucose with 97% and 3% molar percentages, respectively, constituted the EPS. In vitro antibacterial activity analysis of the extracted EPS exhibited antibacterial activity (>80%) against Escherichia coli, Staphylococcus aureus, and Staphylococcus epidermidis at a concentration of 2 mg/mL. The EPS showed cytocompatibility against the human fibroblast and macrophage cell lines and the animal studies showed a dose-dependent wound healing capacity of the EPS with higher wound closure at 10 mg/mL compared to negative and positive control after 14 days. CONCLUSION The EPS from P. terrestris PT22AV could serve as a promising source of biocompatible macromolecules with potential for skin wound healing.
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Affiliation(s)
- Masoud Hamidi
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles-BioMatter unit, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium; Department of Medical Biotechnology, Faculty of Paramedicine, Guilan University of Medical Sciences, Rasht, Iran
| | - Oseweuba Valentine Okoro
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles-BioMatter unit, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium
| | - Giuseppe Ianiri
- Dipartimento Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, Campobasso, Italy
| | - Hafez Jafari
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles-BioMatter unit, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium
| | - Khodabakhsh Rashidi
- Research Center of Oils and Fats, Research Institute for Health Technology, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Saeed Ghasemi
- Department of Medicinal Chemistry, School of Pharmacy, Guilan University of Medical Sciences, Rasht, Iran
| | - Raffaello Castoria
- Dipartimento Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, Campobasso, Italy
| | - Davide Palmieri
- Dipartimento Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, Campobasso, Italy
| | - Cédric Delattre
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, F-63000 Clermont-Ferrand, France; Institut Universitaire de France (IUF), 1 rue Descartes, 75005 Paris, France
| | - Guillaume Pierre
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, F-63000 Clermont-Ferrand, France
| | - Mahta Mirzaei
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles-BioMatter unit, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium
| | - Lei Nie
- College of Life Sciences, Xinyang Normal University, Xinyang 464000, China
| | - Hadi Samadian
- Department of Molecular Medicine, School of Medicine, Hamadan University of Medical Sciences, Hamadan, Iran.
| | - Amin Shavandi
- Université libre de Bruxelles (ULB), École polytechnique de Bruxelles-BioMatter unit, Avenue F.D. Roosevelt, 50 - CP 165/61, 1050 Brussels, Belgium.
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Hu J, Lv X, Niu X, Yu F, Zuo J, Bao Y, Yin H, Huang C, Nawaz S, Zhou W, Jiang W, Chen Z, Tu J, Qi K, Han X. Effect of nutritional and environmental conditions on biofilm formation of avian pathogenic Escherichia coli. J Appl Microbiol 2022; 132:4236-4251. [PMID: 35343028 DOI: 10.1111/jam.15543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/19/2022] [Accepted: 03/21/2022] [Indexed: 11/30/2022]
Abstract
AIMS To study the effects of environmental stress and nutrient conditions on biofilm formation of avian pathogenic Escherichia coli (APEC). METHODS AND RESULTS The APEC strain DE17 was used to study biofilm formation under various conditions of environmental stress (including different temperatures, pH, metal ions, and antibiotics) and nutrient conditions (LB and M9 media, with the addition of different carbohydrates, if necessary). The DE17 biofilm formation ability was strongest at 25°C in LB medium. Compared to incubation at 37°C, three biofilm-related genes (csgD, dgcC, and pfs) were significantly upregulated and two genes (flhC and flhD) were downregulated at 25°C, which resulted in decreased motility. However, biofilm formation was strongest in M9 medium supplemented with glucose at 37°C, and the number of live bacteria was the highest as determined by confocal laser scanning microscopy (CLSM). The bacteria in the biofilm were surrounded by a thick extracellular matrix, and honeycomb-like or rough surfaces were observed by scanning electron microscopy (SEM). Moreover, biofilm formation of the DE17 strain was remarkably inhibited under acidic conditions, whereas neutral and alkaline conditions were more suitable for biofilm formation. Biofilm formation was also inhibited at specific concentrations of cations (Na+ , K+ , Ca2+ , and Mg2+ ) and antibiotics (ampicillin, chloramphenicol, kanamycin, and spectinomycin). The qRT-PCR showed that the transcription levels of biofilm-related genes change under different environmental conditions. CONCLUSIONS Nutritional and environmental factors played an important role in DE17 biofilm development. The transcription levels of biofilm-related genes changed under different environmental and nutrient conditions. SIGNIFICANCE AND IMPACT OF THE STUDY The findings suggest that nutritional and environmental factors play an important role in APEC biofilm development. Depending on the different conditions involved in this study, it can serve as a guide to treating biofilm-related infections and to eliminating biofilms from the environment.
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Affiliation(s)
- Jiangang Hu
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis, Fujian Province, College of Life Science, Longyan University, Longyan, Fujian, China.,Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiaolong Lv
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiangpeng Niu
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Fangheng Yu
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China.,Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Jiakun Zuo
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China
| | - Yinli Bao
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis, Fujian Province, College of Life Science, Longyan University, Longyan, Fujian, China
| | - Huifang Yin
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis, Fujian Province, College of Life Science, Longyan University, Longyan, Fujian, China
| | - Cuiqin Huang
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis, Fujian Province, College of Life Science, Longyan University, Longyan, Fujian, China
| | - Saqib Nawaz
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China
| | - Wen Zhou
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China
| | - Wei Jiang
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China
| | - Zhaoguo Chen
- Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China
| | - Jian Tu
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Kezong Qi
- Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control, Anhui Agricultural University, Hefei, Anhui, China
| | - Xiangan Han
- Engineering Research Center for the Prevention and Control of Animal Original Zoonosis, Fujian Province, College of Life Science, Longyan University, Longyan, Fujian, China.,Shanghai Veterinary Research Institute, the Chinese Academy of Agricultural Sciences (CAAS), 518 Ziyue Road, Shanghai, China
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9
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Das S. Structural and mechanical characterization of biofilm-associated bacterial polymer in the emulsification of petroleum hydrocarbon. 3 Biotech 2021; 11:239. [PMID: 33968582 DOI: 10.1007/s13205-021-02795-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 04/15/2021] [Indexed: 12/20/2022] Open
Abstract
The marine bacterium Pseudomonas furukawaii PPS-19 isolated from the oil-polluted site of Paradip port, Odisha, India, was found to form a strong biofilm in 2% (v/v) crude oil. Confocal Laser Scanning Microscopy (CLSM) revealed biofilm components along with multi-layered dense biofilm of rod-shaped cells with 64.7 µm thickness. Scanning electron micrographs showed similar biofilm architecture covered with a gluey matrix of extracellular polymeric substances (EPS) in the presence of 2% (v/v) crude oil. The architecture of purified EPS was also studied through FESEM that exposed its porous and three-dimensional flakes-like structure. The structural characterization by FTIR revealed that EPS was composed of primary alkane, amines, halide, hydroxyl groups, uronic acid, and saccharides. The XRD profile exhibited an amorphous phase of the EPS with a crystallinity index of 0.336. The EPS showed three-step thermal decomposition and thermal stability up to 600 °C, as confirmed by TGA and DSC thermogram. EPS produced by marine bacterium P. furukawaii PPS-19 could act as bioemulsifier and showed the highest emulsifying activity of 66.23% on petrol. The emulsifying ability of the EPS was superior to the commercial polymer xanthan. The emulsion also showed high stability with time and temperature exposure. The marine bacterium P. furukawaii PPS-19 and the EPS complex showed 89.52% degradation of crude oil within 5 days. These properties demonstrated the potential of biofilm-forming marine bacterium as bioemulsifier for its application in the bioremediation of oil-polluted sites. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-02795-8.
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Affiliation(s)
- Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, Odisha 769 008 India
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10
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Nguyen PT, Nguyen TT, Vo TNT, Nguyen TTX, Hoang QK, Nguyen HT. Response of Lactobacillus plantarum VAL6 to challenges of pH and sodium chloride stresses. Sci Rep 2021; 11:1301. [PMID: 33446763 PMCID: PMC7809271 DOI: 10.1038/s41598-020-80634-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Accepted: 12/17/2020] [Indexed: 12/02/2022] Open
Abstract
To investigate the effect of environmental stresses on the exopolysaccharide biosynthesis, after 24 h of culture at 37 °C with pH 6.8 and without sodium chloride, Lactobacillus plantarum VAL6 was exposed to different stress conditions, including pH (pHs of 3 and 8) and high sodium chloride concentration treatments. The results found that Lactobacillus plantarum VAL6 exposed to stress at pH 3 for 3 h gives the highest exopolysaccharide yield (50.44 g/L) which is 6.4 fold higher than non-stress. Under pH and sodium chloride stresses, the mannose content in exopolysaccharides decreased while the glucose increased in comparison with non-stress condition. The galactose content was highest under stress condition of pH 8 meantime rhamnose content increased sharply when Lactobacillus plantarum VAL6 was stressed at pH 3. The arabinose content in exopolysaccharides was not detected under non-stress condition but it was recorded in great amounts after 3 h of stress at pH 3. In addition, stress of pH 8 triggered the mRNA expression of epsF gene resulting in galactose-rich EPS synthesis. According to our results, the stresses of pH and sodium chloride enhance the production and change the mRNA expression of epsF gene, leading to differences in the monosaccharide composition of exopolysaccharides.
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Affiliation(s)
- Phu-Tho Nguyen
- Graduate University of Sciences and Technology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
- An Giang University, Vietnam National University, Ho Chi Minh City, Vietnam
| | | | | | | | - Quoc-Khanh Hoang
- Institute of Tropical Biology, Vietnam Academy of Science and Technology, Hanoi, Vietnam
| | - Huu-Thanh Nguyen
- An Giang University, Vietnam National University, Ho Chi Minh City, Vietnam.
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11
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Effects of carbon sources and temperature on the formation and structural characteristics of food-related Staphylococcus epidermidis biofilms. FOOD SCIENCE AND HUMAN WELLNESS 2020. [DOI: 10.1016/j.fshw.2020.05.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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12
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Nguyen PT, Nguyen TT, Bui DC, Hong PT, Hoang QK, Nguyen HT. Exopolysaccharide production by lactic acid bacteria: the manipulation of environmental stresses for industrial applications. AIMS Microbiol 2020; 6:451-469. [PMID: 33364538 PMCID: PMC7755584 DOI: 10.3934/microbiol.2020027] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 11/12/2020] [Indexed: 02/06/2023] Open
Abstract
Exopolysaccharides (EPSs) are biological polymers secreted by microorganisms including Lactic acid bacteria (LAB) to cope with harsh environmental conditions. EPSs are one of the main components involved in the formation of extracellular biofilm matrix to protect microorganisms from adverse factors such as temperature, pH, antibiotics, host immune defenses, etc.. In this review, we discuss EPS biosynthesis; the role of EPSs in LAB stress tolerance; the impact of environmental stresses on EPS production and on the expression of genes involved in EPS synthesis. The evaluation results indicated that environmental stresses can alter EPS biosynthesis in LAB. For further studies, environmental stresses may be used to generate a new EPS type with high biological activity for industrial applications.
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Affiliation(s)
- Phu-Tho Nguyen
- Graduate University of Sciences and Technology, Vietnam Academy of Science and Technology, Ha Noi, Vietnam
- Department of Biotechnology, An Giang University, An Giang, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Tho-Thi Nguyen
- Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Vietnam
| | - Duc-Cuong Bui
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, United States
| | - Phuoc-Toan Hong
- LAVI's Institute for Agricultural Science and Plant Breeding, Ho Chi Minh City, Vietnam
| | - Quoc-Khanh Hoang
- Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam
| | - Huu-Thanh Nguyen
- Department of Biotechnology, An Giang University, An Giang, Vietnam
- Vietnam National University Ho Chi Minh City, Ho Chi Minh City, Vietnam
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13
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Structural characterization and functional properties of novel exopolysaccharide from the extremely halotolerant Halomonas elongata S6. Int J Biol Macromol 2020; 164:95-104. [PMID: 32673722 DOI: 10.1016/j.ijbiomac.2020.07.088] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2020] [Revised: 06/21/2020] [Accepted: 07/09/2020] [Indexed: 12/19/2022]
Abstract
Production of extracellular polysaccharides by halophilic Archaea and Bacteria has been widely reported and the members of the genus Halomonas have been identified as the most potential producers. In the present work, a novel exopolysaccharide (EPS-S6) produced by the extremely halotolerant newly isolated Halomonas elongata strain S6, was characterized. According to the HPAE-PAD results, EPS-S6 was mainly composed of glucosamine, mannose, rhamnose and glucose (1:0.9:0.7:0.3). EPS-S6 was highly negatively charged and its molecular weight was about 270 kDa. Studies on its functional properties showed that EPS-S6 had several potential features. It has noticeable antioxidant activities on 2,2-diphenyl-1-picrylhydrazyl (DPPH•) inhibition and DNA protection, good ability to inhibit and to disrupt pathogenic biofilms, excellent flocculation of kaolin suspension and interesting emulsifying properties at acidic, neutral and basic pH. Therefore, EPS-S6 could have potential biotechnological concern in several fields such as in food, cosmetic and environmental industries.
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14
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Azaroual SE, Hazzoumi Z, Mernissi NE, Aasfar A, Meftah Kadmiri I, Bouizgarne B. Role of Inorganic Phosphate Solubilizing Bacilli Isolated from Moroccan Phosphate Rock Mine and Rhizosphere Soils in Wheat (Triticum aestivum L) Phosphorus Uptake. Curr Microbiol 2020; 77:2391-2404. [PMID: 32468184 DOI: 10.1007/s00284-020-02046-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 05/20/2020] [Indexed: 01/19/2023]
Abstract
This work aimed to assess the ability of plant growth-promoting Bacilli isolated from wheat rhizosphere and rock phosphate mine soils to convert inorganic phosphate (Pi) from Moroccan natural phosphate (NP) to soluble forms. The effect of these bacteria on wheat plants in order to increase their phosphorus (P) uptake in vitro was also investigated. Bacteria were isolated from wheat rhizosphere and natural rock phosphate soils and screened for their ability to solubilize Tri-Calcium Phosphate (TCP) and Natural Rock Phosphate (NP), to produce indole-3-acetic acid (IAA), siderophores and 1-aminocyclopropane-1-carboxylate (ACC) deaminase. Isolates were identified by 16S rRNA sequencing and tested for their capacity to increase wheat plants growth and their phosphorus uptake.Twenty-four strains belonging to Bacillus genus isolated from both biotopes were screened for their ability to solubilize Pi. The highest NP solubilization was showed by strains isolated from wheat rhizosphere. Solubilization of Pi was accompanied by organic acid production. Strains produce IAA, siderophore and ACC deaminase. Inoculation assays using efficient NP-solubilizing bacilli strains from both sources showed the ability of these isolates to increase wheat growth and the phosphorus uptake under in vitro conditions. Bacilli strains isolated from rhizosphere soil and natural rock phosphorus soil showed effective solubilization of Pi from rock phosphate. Phosphate solubilizing Bacilli were evaluated for their plant growth promotion under in vitro conditions. Results revealed the positive effect of all strains on biometric parameters and P content of wheat seedlings.
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Affiliation(s)
- Salah Eddine Azaroual
- Team: Microbial Biotechnology, Laboratory : Plant Biotechnology, Faculty of Sciences, Ibn Zohr University, Cité Dakhla, BP 8106, Agadir, Morocco.,Green Biotechnology Laboratory, Moroccan Foundation For Advanced Science Innovation and Research- Rue Mohammed Al Jazouli, Madinat Al Irfan, Rabat, Morocco
| | - Zakaria Hazzoumi
- Green Biotechnology Laboratory, Moroccan Foundation For Advanced Science Innovation and Research- Rue Mohammed Al Jazouli, Madinat Al Irfan, Rabat, Morocco
| | - Najib El Mernissi
- Green Biotechnology Laboratory, Moroccan Foundation For Advanced Science Innovation and Research- Rue Mohammed Al Jazouli, Madinat Al Irfan, Rabat, Morocco
| | - Abderrahim Aasfar
- Green Biotechnology Laboratory, Moroccan Foundation For Advanced Science Innovation and Research- Rue Mohammed Al Jazouli, Madinat Al Irfan, Rabat, Morocco
| | - Issam Meftah Kadmiri
- Green Biotechnology Laboratory, Moroccan Foundation For Advanced Science Innovation and Research- Rue Mohammed Al Jazouli, Madinat Al Irfan, Rabat, Morocco.
| | - Brahim Bouizgarne
- Team: Microbial Biotechnology, Laboratory : Plant Biotechnology, Faculty of Sciences, Ibn Zohr University, Cité Dakhla, BP 8106, Agadir, Morocco.
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15
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Jin H, Wang H, Zhang Y, Hu T, Lin Z, Liu B, Ma J, Wang X, Liu Q, Lin X, Xie Z. Description of Azotobacter chroococcum subsp. isscasi subsp. nov. isolated from paddy soil and establishment of Azotobacter chroococcum subsp. chroococcum subsp. nov. Int J Syst Evol Microbiol 2020; 70:2124-2131. [DOI: 10.1099/ijsem.0.004026] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Three aerobic, asymbiotic, N2-fixing bacterial strains, designated P205T, P204 and P207, were isolated from a paddy soil in Yanting County, China. Based on 16S rRNA gene sequences, the three strains were closely related to
Azotobacter chroococcum
IAM 12666T (=ATCC 9043T) (99.00–99.79 % similarities). Strain P205T formed an individual branch distinct from the other two newly isolated strains and other related type strains in phylogenetic analyses based on 16S rRNA gene and 92 core genes. The average nucleotide identity (ANI), average amino acid identity (AAI) and digital DNA–DNA hybridization (dDDH) values based on genome sequences of strain P205T and
A. chroococcum
ATCC 9043T, P204, P207 were near or slightly higher than the thresholds for species circumscription (95–96, 95–96 and 70 %, respectively), and the dDDH values were significantly lower than the threshold for delineating subspecies (79–80 %), which strongly supported that strain P205T belonged to
A. chroococcum
but was a novel subspecies distinct from the type strain of
A. chroococcum
. This finding was further corroborated by distinct phenotypic characteristics such as growth in Luria–Bertani (LB) medium, carbon source utilization and chemical sensitivity to vancomycin. Therefore, strain P205T represents a novel subspecies of
Azotobacter chroococcum
, for which the name
Azotobacter chroococcum
subsp. isscasi subsp. nov. is proposed with the type strain P205T (=KCTC 72233T=CGMCC 1.16846T=CCTCC AB 2019080T). The subspecies
Azotobacter chroococcum
subsp. chroococcum subsp. nov. is created automatically with the type strain ATCC 9043T (=DSM 2286T=JCM 20725T=JCM 21503T=LMG 8756T=NBRC 102613T=NCAIM B.01391T=NRRL B-14346T=VKM B-1616T).
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Affiliation(s)
- Haiyang Jin
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Hui Wang
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Yanhui Zhang
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Tianlong Hu
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Zhibin Lin
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Benjuan Liu
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Jing Ma
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Xiaojie Wang
- University of Chinese Academy of Sciences, Beijing 100049, PR China
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Qi Liu
- College of Forestry, Nanjing Forestry University, Nanjing 210037, PR China
| | - Xingwu Lin
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
| | - Zubin Xie
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, PR China
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16
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Abid Y, Azabou S, Joulak I, Casillo A, Lanzetta R, Corsaro MM, Gharsallaoui A, Attia H. Potential biotechnological properties of an exopolysaccharide produced by newly isolated Bacillus tequilensis-GM from spontaneously fermented goat milk. Lebensm Wiss Technol 2019. [DOI: 10.1016/j.lwt.2019.02.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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17
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de Jesus CS, de Jesus Assis D, Rodriguez MB, Menezes Filho JA, Costa JAV, de Souza Ferreira E, Druzian JI. Pilot-scale isolation and characterization of extracellular polymeric substances (EPS) from cell-free medium of Spirulina sp. LEB-18 cultures under outdoor conditions. Int J Biol Macromol 2018; 124:1106-1114. [PMID: 30521900 DOI: 10.1016/j.ijbiomac.2018.12.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/27/2018] [Accepted: 12/01/2018] [Indexed: 11/26/2022]
Abstract
This objective of this work was to monitor the EPS production during the growth of Spirulina sp. LEB-18, evaluate the productivity and to characterize the exopolymers obtained on pilot-scale under outdoor conditions. The production of crude EPS occurred in all phases of biomass growth and was approximately ten folds higher than that biomass concentration of Spirulina sp. LEB-18 at the end cultivation, demonstrating the importance of the use of supernatant after harvesting of Spirulina to obtain high value bioproducts. The EPS extracted by Spirulina sp. LEB-18 are typically heteropolymers with one high molecular weight fraction (polysaccharides) with potential to be utilized as an alternative bioflocculant and another fraction of lower molecular mass (proteins). The presence of uronic acids, pyruvates and acyl groups of carbohydrates or carboxylic groups of amino acids in protein moiety is the main responsible for overall negative charge of EPS, which is also of biotechnological importance. Moreover, due to the pseudoplastic behavior of the solutions and high thermal stability, the obtained EPS can be widely applied in several industrial sectors, thus determining its technological and market potentiality.
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Affiliation(s)
| | | | | | | | - Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Rio Grande, Brazil
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18
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Nambiar RB, Sellamuthu PS, Perumal AB, Sadiku ER, Phiri G, Jayaramudu J. Characterization of an exopolysaccharide produced by Lactobacillus plantarum HM47 isolated from human breast milk. Process Biochem 2018. [DOI: 10.1016/j.procbio.2018.07.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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19
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Chatterjee S, Mukhopadhyay SK, Gauri SS, Dey S. Sphingobactan, a new α-mannan exopolysaccharide from Arctic Sphingobacterium sp. IITKGP-BTPF3 capable of biological response modification. Int Immunopharmacol 2018; 60:84-95. [DOI: 10.1016/j.intimp.2018.04.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 04/21/2018] [Accepted: 04/23/2018] [Indexed: 01/17/2023]
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20
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Zhou Q, Feng F, Yang Y, Zhao F, Du R, Zhou Z, Han Y. Characterization of a dextran produced by Leuconostoc pseudomesenteroides XG5 from homemade wine. Int J Biol Macromol 2018; 107:2234-2241. [DOI: 10.1016/j.ijbiomac.2017.10.098] [Citation(s) in RCA: 47] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 09/11/2017] [Accepted: 10/15/2017] [Indexed: 10/18/2022]
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21
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Phosphate-Solubilizing and Auxin-Producing Rhizobacteria Promote Plant Growth Under Saline Conditions. ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING 2018. [DOI: 10.1007/s13369-017-3042-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Zhou JF, Li GQ, Xie JJ, Cui XY, Dai XH, Tian HM, Gao PK, Wu MM, Ma T. A novel bioemulsifier from Geobacillus stearothermophilus A-2 and its potential application in microbial enhanced oil recovery. RSC Adv 2016. [DOI: 10.1039/c6ra15626f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A novel glycoprotein emulsifier from the thermophilic, facultative anaerobic strain A-2 showing excellent, stable emulsifying properties and its potential application in MEOR.
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Affiliation(s)
- Jie-fang Zhou
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Guo-qiang Li
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Jun-jie Xie
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Xiao-yu Cui
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Xiao-hui Dai
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Hui-mei Tian
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Pei-ke Gao
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Meng-meng Wu
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
| | - Ting Ma
- Key Laboratory of Molecular Microbiology and Technology
- Ministry of Education
- College of Life Sciences
- Nankai University
- Tianjin 300071
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23
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Harvey DJ. Analysis of carbohydrates and glycoconjugates by matrix-assisted laser desorption/ionization mass spectrometry: an update for 2009-2010. MASS SPECTROMETRY REVIEWS 2015; 34:268-422. [PMID: 24863367 PMCID: PMC7168572 DOI: 10.1002/mas.21411] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 05/07/2023]
Abstract
This review is the sixth update of the original article published in 1999 on the application of MALDI mass spectrometry to the analysis of carbohydrates and glycoconjugates and brings coverage of the literature to the end of 2010. General aspects such as theory of the MALDI process, matrices, derivatization, MALDI imaging, arrays and fragmentation are covered in the first part of the review and applications to various structural typed constitutes the remainder. The main groups of compound that are discussed in this section are oligo and polysaccharides, glycoproteins, glycolipids, glycosides and biopharmaceuticals. Many of these applications are presented in tabular form. Also discussed are medical and industrial applications of the technique, studies of enzyme reactions and applications to chemical synthesis.
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Affiliation(s)
- David J. Harvey
- Department of BiochemistryOxford Glycobiology InstituteUniversity of OxfordOxfordOX1 3QUUK
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24
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Recent advances in exopolysaccharides from Paenibacillus spp.: production, isolation, structure, and bioactivities. Mar Drugs 2015; 13:1847-63. [PMID: 25837984 PMCID: PMC4413190 DOI: 10.3390/md13041847] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Revised: 03/23/2015] [Accepted: 03/25/2015] [Indexed: 12/02/2022] Open
Abstract
This review provides a comprehensive summary of the most recent developments of various aspects (i.e., production, purification, structure, and bioactivity) of the exopolysaccharides (EPSs) from Paenibacillus spp. For the production, in particular, squid pen waste was first utilized successfully to produce a high yield of inexpensive EPSs from Paenibacillus sp. TKU023 and P. macerans TKU029. In addition, this technology for EPS production is prevailing because it is more environmentally friendly. The Paenibacillus spp. EPSs reported from various references constitute a structurally diverse class of biological macromolecules with different applications in the broad fields of pharmacy, cosmetics and bioremediation. The EPS produced by P. macerans TKU029 can increase in vivo skin hydration and may be a new source of natural moisturizers with potential value in cosmetics. However, the relationships between the structures and activities of these EPSs in many studies are not well established. The contents and data in this review will serve as useful references for further investigation, production, structure and application of Paenibacillus spp. EPSs in various fields.
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25
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Biswas J, Ganguly J, Paul AK. Partial characterization of an extracellular polysaccharide produced by the moderately halophilic bacterium Halomonas xianhensis SUR308. BIOFOULING 2015; 31:735-744. [PMID: 26577604 DOI: 10.1080/08927014.2015.1106479] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
A moderately halophilic bacterium, Halomonas xianhensis SUR308 (Genbank Accession No. KJ933394) was isolated from a multi-pond solar saltern at Surala, Ganjam district, Odisha, India. The isolate produced a significant amount (7.87 g l(-1)) of extracellular polysaccharides (EPS) when grown in malt extract-yeast extract medium supplemented with 2.5% NaCl, 0.5% casein hydrolysate and 3% glucose. The EPS was isolated and purified following the conventional method of precipitation and dialysis. Chromatographic analysis (paper, GC and GC-MS) of the hydrolyzed EPS confirmed its heteropolymeric nature and showed that it is composed mainly of glucose (45.74 mol%), galactose (33.67 mol %) and mannose (17.83 mol%). Fourier-transform infrared spectroscopy indicated the presence of methylene and carboxyl groups as characteristic functional groups. In addition, its proton nuclear magnetic resonance spectrum revealed functional groups specific for extracellular polysaccharides. X-ray diffraction analysis revealed the amorphous nature (CIxrd, 0.56) of the EPS. It was thermostable up to 250 °C and displayed pseudoplastic rheology and remarkable stability against pH and salts. These unique properties of the EPS produced by H. xianhensis indicate its potential to act as an agent for detoxification, emulsification and diverse biological activities.
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Affiliation(s)
- Jhuma Biswas
- a Microbiology Laboratory, Department of Botany , University of Calcutta , Kolkata , India
| | - J Ganguly
- b Natural Polysaccharide Laboratory, Department of Chemistry , Indian Institute of Engineering Science and Technology , Shibpur , India
| | - A K Paul
- a Microbiology Laboratory, Department of Botany , University of Calcutta , Kolkata , India
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Miao M, Bai A, Jiang B, Song Y, Cui SW, Zhang T. Characterisation of a novel water-soluble polysaccharide from Leuconostoc citreum SK24.002. Food Hydrocoll 2014. [DOI: 10.1016/j.foodhyd.2013.10.014] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Isolation and characterization of extracellular polysaccharide Thelebolan produced by a newly isolated psychrophilic Antarctic fungus Thelebolus. Carbohydr Polym 2014; 104:204-12. [PMID: 24607179 DOI: 10.1016/j.carbpol.2014.01.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Revised: 01/03/2014] [Accepted: 01/11/2014] [Indexed: 11/24/2022]
Abstract
The present investigation is on a newly isolated psychrophilic Antarctic filamentous Ascomycetous fungus that has been identified as Thelebolus sp. and given the designation of Thelebolus sp. IITKGP-BT12. The culture was primarily identified through morphological studies, and was further confirmed by 18S rRNA sequencing (GenBank Accession No. KC191572), which revealed its close relatedness with Thelebolus microsporus. The exopolysaccharide (EPS) produced (1.94 g L(-1)) by the fungus was isolated, purified and characterized as glucan having an average molecular mass of 5×10(5)Da. The structure of EPS was determined by gas chromatography with tandem mass spectrometry (GC-MS/MS), Fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (NMR) studies ((1)H, (13)C and HSQC). NMR analysis indicated the presence of (1→3)-linked β-d-glucan backbone with (1→6)-linked branches of β-d-glucopyranosyl units. Antiproliferative activity of EPS was demonstrated in B16-F0 cells, with IC50 of 275.42 μg m L(-1). Flow cytometry analysis and DNA fragmentation studies revealed that the cytotoxic action of the EPS mediated apoptosis in cancer cells. This is the first ever report on bioactive EPS thelebolan from Thelebolus sp.
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Copper susceptibility in Acinetobacter junii BB1A is related to the production of extracellular polymeric substances. Antonie van Leeuwenhoek 2013; 104:261-9. [PMID: 23756604 DOI: 10.1007/s10482-013-9946-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 05/30/2013] [Indexed: 10/26/2022]
Abstract
Acinetobacter junii BB1A cells, grown in different media, were differentially inhibited in the presence of the copper. The minimum inhibitory concentration of Cu(2+) was influenced by the nutrient status of the media. The production of extracellular polymeric substances (EPS) was stimulated by the copper present in the growth medium. The nature of the EPS was anionic showing non-Newtonian pseudoplastic behaviour. The thermal behaviour of the EPS was studied by differential scanning calorimetry. The EPS was amorphous in nature with a crystalline index of 0.16. Scanning electron micrographs revealed its porous structure. Cells grown in the presence of quorum sensing inhibitor (QSI: 4-Nitropyridine-N-oxide) did not produce EPS and were found to be more sensitive to Cu(2+) than cells which produced EPS in the absence of QSI. EPS production in different media in the presence and absence of Cu(2+) was determined. The production of EPS was the highest in brain heart Infusion medium and the lowest in AB minimal medium. The sorption of Cu(2+) by EPS extracted from cells grown in non-copper-complexing AB medium was demonstrated by energy dispersive X-ray spectroscopy. A pertinent functional aspect of EPS in providing protection to A. junii in copper stress condition has been revealed.
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Kanmani P, Suganya K, kumar RS, Yuvaraj N, Pattukumar V, Paari KA, Arul V. Synthesis and Functional Characterization of Antibiofilm Exopolysaccharide Produced by Enterococcus faecium MC13 Isolated from the Gut of Fish. Appl Biochem Biotechnol 2013; 169:1001-15. [DOI: 10.1007/s12010-012-0074-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 12/26/2012] [Indexed: 10/27/2022]
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Ahmed Z, Wang Y, Anjum N, Ahmad A, Khan ST. Characterization of exopolysaccharide produced by Lactobacillus kefiranofaciens ZW3 isolated from Tibet kefir – Part II. Food Hydrocoll 2013. [DOI: 10.1016/j.foodhyd.2012.06.009] [Citation(s) in RCA: 148] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Gauri SS, Mandal SM, Dey S, Pati BR. Biotransformation of p-coumaric acid and 2,4-dichlorophenoxy acetic acid by Azotobacter sp. strain SSB81. BIORESOURCE TECHNOLOGY 2012; 126:350-353. [PMID: 23127838 DOI: 10.1016/j.biortech.2012.09.097] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2012] [Revised: 09/24/2012] [Accepted: 09/26/2012] [Indexed: 06/01/2023]
Abstract
A comprehensive study was made on biotransformation of p-coumaric acid and 2,4-dichlorophenoxyacetic acid by an Azotobacter sp. strain SSB81. The strain was able to tolerate a high amount of both the phenolic acids and p-coumaric acid degraded maximum (50%) than 2,4-D (29%) after five days of incubation. The intermediate products during transformation have been identified and quantified using UV-Vis and LC-MS/MS analysis. Para-coumaric acid was degraded via p-hydroxybenzoic acid and protocatechuic acid, a non-oxidative pathway whereas 2,4-D via 4-chlorophenoxyacetic acid, 4-chlorophenol and 4-chlorocatechol, an oxidative pathway. The results suggest that SSB81 developed both the oxidative and non-oxidative pathway to degrade the soil accumulated phenolic acids. Thus, Azotobacter provides an advantage to reduce the toxic level of soil accumulated phenolic acids in addition to increase the soil fertility.
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Affiliation(s)
- Samiran S Gauri
- Department of Microbiology, Vidyasagar University, Midnapore 721102, India
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Jung JH, Choi NY, Lee SY. Biofilm formation and exopolysaccharide (EPS) production by Cronobacter sakazakii depending on environmental conditions. Food Microbiol 2012; 34:70-80. [PMID: 23498180 DOI: 10.1016/j.fm.2012.11.008] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Revised: 11/01/2012] [Accepted: 11/19/2012] [Indexed: 11/25/2022]
Abstract
Biofilm matrices are formed largely of extracellular polymeric substance (EPS). This study was conducted to investigate biofilm formation and EPS production by Cronobacter sakazakii under various conditions (media, nutrition, and relative humidity (RH)) by quantification of EPS and cell populations, Field Emission Scanning Electron Microscope (FE-SEM), and colony observation. Various agar media conditions (TSA without dextrose (W/D), M9 minimum salt medium (MSM) agar, and M9 MSM agar with 3% glucose, 3% NaCl, 3% Tween 80, 3% sucrose, and adjusted to pH 5 with HCl) were prepared. C. sakazakii biofilm formed on the surface of stainless steel coupons (SSCs) immersed in TSB W/D and M9 MSM with or without 0, 1, 3, and 5% sucrose and subsequently exposed to various RH levels (23, 43, 68, 85, and 100%). EPS production by C. sakazakii on TSA W/D was significantly higher than that on other media after 1 and 2 days. However, C. sakazakii ATCC 12868 produced the highest levels of EPS (209.18 ± 16.13 and 207.22 ± 4.14 μg/mL after 1 and 2 days, respectively) on M9 MSM agar with 3% sucrose. Regarding C. sakazakii ATCC 12868 biofilm formed on the surface of SSCs immersed in M9 MSM with 0, 1, 3, and 5% sucrose and subsequently exposed to various RHs, populations were significantly different among the various RHs and sucrose concentrations, and EPS production was significantly higher (4.69 mg/L) compared to other sucrose concentrations (0%:0.71 mg/L and 1%:0.98 mg/L), except for M9 MSM with 3% sucrose (2.97 mg/L) (P ≤ 0.05). From these results, biofilm formation and EPS production by C. sakazakii differed depending on the nutrient or environmental conditions provided to the cells.
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Affiliation(s)
- Jin-Ho Jung
- Department of Food Science and Technology, Chung-Ang University, 72-1 Nae-ri, Daedeok-myeon, Anseong-si, Gyeonggi-do, 456-756, South Korea
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Gauri S, Mandal S, Atta S, Dey S, Pati B. Novel route of tannic acid biotransformation and their effect on major biopolymer synthesis in Azotobacter
sp. SSB81. J Appl Microbiol 2012; 114:84-95. [PMID: 23035941 DOI: 10.1111/jam.12030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/12/2012] [Accepted: 09/20/2012] [Indexed: 11/29/2022]
Affiliation(s)
- S.S. Gauri
- Department of Microbiology; Vidyasagar University; Midnapore West Bengal India
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur India
| | - S.M. Mandal
- Central Research Facility; Indian Institute of Technology Kharagpur; Kharagpur West Bengal India
| | - S. Atta
- Department of Chemistry; Indian Institute of Technology Kharagpur; Kharagpur West Bengal India
| | - S. Dey
- Department of Biotechnology; Indian Institute of Technology Kharagpur; Kharagpur India
| | - B.R. Pati
- Department of Microbiology; Vidyasagar University; Midnapore West Bengal India
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Flocculating Property of Extracellular Polymeric Substances Produced by a Biofilm-Forming Bacterium Acinetobacter junii BB1A. Appl Biochem Biotechnol 2012; 168:1621-34. [DOI: 10.1007/s12010-012-9883-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Accepted: 08/28/2012] [Indexed: 10/27/2022]
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Mandal AK, Yadav KK, Sen IK, Kumar A, Chakraborti S, Islam SS, Chakraborty R. Partial characterization and flocculating behavior of an exopolysaccharide produced in nutrient-poor medium by a facultative oligotroph Klebsiella sp. PB12. J Biosci Bioeng 2012; 115:76-81. [PMID: 22944200 DOI: 10.1016/j.jbiosc.2012.08.006] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2012] [Revised: 07/13/2012] [Accepted: 08/07/2012] [Indexed: 11/17/2022]
Abstract
A facultative oligotrophic strain from the water sample of River Mahananda, Siliguri India was selected for its property to produce exopolysaccharide (EPS) in nutrient-poor (oligotrophic) medium. Viability assay of the strain was performed in sterile liquid LB, R2A, river water and diluted (10(-3)) LB at 30°C and pH 7 to understand oligotrophy. The selected strain was identified by 16S rRNA gene sequencing and designated as Klebsiella sp. PB12. Phylogenetic analysis showed its closest relationship with Klebsiella variicola ATCC BAA-830(T). Purification of EPS was performed by ethanol precipitation, dialysis and freeze-drying. Chemical analysis revealed that purified EPS was mainly composed of 72.32% (w/w) neutral sugar and 14.12% (w/w) uronic acids. Fourier transform infrared (FT-IR) spectroscopy indicated the presence of hydroxyl, carboxylic and methoxyl functional groups. The optimal dosages for flocculation of activated carbon suspension were 17 mg/l EPS and 4 mM CaCl(2). EPS showed flocculating rate of above 80% over a wide range of pH (pH 3-10) whereas, more than 90% rate was noted in the temperature range (10-50°C) tested in presence of CaCl(2). Moreover, EPS showed characteristic emulsifying activity with toluene (66.6%), n-hexadecane (65%), olive oil (63.3%) and kerosene (50%). The apparent molecular weight of the EPS was ~2 × 10(5) Da.
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Affiliation(s)
- Amit Kumar Mandal
- Department of Biotechnology, Omics Laboratory, University of North Bengal, Siliguri 734013, West Bengal, India
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Gedda G, Gopal J, Wu HF. Electrospray ionization and matrix-assisted laser desorption/ionization mass spectrometric analysis of extrapolysaccharides of Escherichia coli. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2012; 26:1609-1616. [PMID: 22693117 DOI: 10.1002/rcm.6263] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
RATIONALE Conventional studies of extracellular polymeric substances (EPS) typically require elaborate separation procedures or complicated sample pretreatment processes such as purification by dialysis and lyophilization. The objective of this study is to demonstrate the use of electrospray ionization (ESI) and matrix-assisted laser desorption/ionization (MALDI) mass spectrometry (MS) as powerful techniques for direct analysis of EPS secreted by E. coli. METHODS We have compared the extraction efficiency of two widely used extraction methods including physical extraction (room-temperature centrifugation and high-speed centrifugation) and chemical extraction using EDTA and formaldehyde. We specify the most favorable extraction method and the analyte to extractant concentration with respect to mass spectrometric analysis of EPS, based on the results obtained from ESI-MS and MALDI-MS analysis. RESULTS Chemical extraction methods were found to be more efficient than physical extraction methods. Of the chemical extractants, EDTA was found more effective compared to formaldehyde and gave more EPS peaks during ESI- and MALDI-MS analysis. We report the classification of E. coli EPS into loosely bound, bound and tightly bound EPS based on a simple modification of an existing methodology. Our studies showed that ESI-MS was very effective for <300 Da EPS studies and MALDI-MS more suitable for rapid analysis of EPS above mass range 400 Da. CONCLUSIONS This is a preliminary study reporting for the first time the feasibility of ESI-MS and MALDI-MS techniques for the analysis of bacterial EPS without prior complicated purification and separation methodologies.
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Affiliation(s)
- Gangaraju Gedda
- Doctoral Degree Program in Marine Biotechnology, National Sun Yat-Sen University, Kaohsiung, Taiwan
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Gauri SS, Mandal SM, Pati BR. Impact of Azotobacter exopolysaccharides on sustainable agriculture. Appl Microbiol Biotechnol 2012; 95:331-8. [PMID: 22615056 DOI: 10.1007/s00253-012-4159-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2012] [Revised: 05/04/2012] [Accepted: 05/04/2012] [Indexed: 11/25/2022]
Abstract
Recently, increasing attention have lead to search other avenue of biofertilizers with multipurpose activities as a manner of sustainable soil health to improve the plant productivity. Azotobacter have been universally accepted as a major inoculum used in biofertilizer to restore the nitrogen level into cultivated field. Azotobacter is well characterized for their profuse production of exopolysaccharides (EPS). Several reviews on biogenesis and multifunctional role of Azotobacter EPS have been documented with special emphasis on industrial applications. But the impact of Azotobacter EPS in plant growth promotion has not received adequate attention. This review outlines the evidence that demonstrates not only the contribution of Azotobacter EPS in global nutrient cycle but also help to compete successfully in different adverse ecological and edaphic conditions. This also focuses on new insights and concepts of Azotobacter EPS which have positive effects caused by the biofilm formation on overall plant growth promotion with other PGPRs. In addition, their potentials in agricultural improvement are also discussed. Recent data realized that Azotobacter EPS have an immense agro-economical importance including the survivability and maintenance of microbial community in their habitat. This leads us to confirm that the next generation Azotobacter inoculum with high yielding EPS and high nitrogen fixing ability can be utilized to satisfy the future demand of augmented crop production attributed to increase plant growth promoting agents.
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Affiliation(s)
- Samiran S Gauri
- Central Research Facility, Indian Institute of Technology Kharagpur, Kharagpur, West Bengal, India
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Chowdhury SR, Manna S, Saha P, Basak RK, Sen R, Roy D, Adhikari B. Composition analysis and material characterization of an emulsifying extracellular polysaccharide (EPS) produced by Bacillus megaterium RB-05: a hydrodynamic sediment-attached isolate of freshwater origin. J Appl Microbiol 2011; 111:1381-93. [PMID: 21973188 DOI: 10.1111/j.1365-2672.2011.05162.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIMS This work was aimed to isolate, purify and characterize an extracellular polysaccharide (EPS) produced by a freshwater dynamic sediment-attached micro-organism, Bacillus megaterium RB-05, and study its emulsifying potential in different hydrocarbon media. METHODS AND RESULTS Bacillus megaterium RB-05 was found to produce EPSs in glucose mineral salts medium, and maximum yield (0.864 g l(-1) ) was achieved after 24-h incubation. The recovery rates of the polysaccharide material by ion-exchange and gel filtration chromatography were around 67 and 93%, respectively. As evident from HPLC and FT-IR analyses, the polysaccharide was found to be a heteropolymer-containing glucose, galactose, mannose, arabinose, fucose and N-acetyl glucosamine. Different oligosaccharide combinations namely hexose(3), hexose(4), hexose(5) deoxyhexose(1) and hexose(5) deoxyhexose(1) pentose(3) were obtained after partial hydrolysis of the polymer using MALDI-ToF-MS. The polysaccharide with an average molecular weight of 170 kDa and thermal stability up to 180°C showed pseudoplastic rheology and significant emulsifying activity in hydrocarbon media. CONCLUSIONS Isolated polysaccharide was found to be of high molecular weight and thermally stable. The purified EPS fraction was composed of hexose, pentose and deoxyhexose sugar residues, which is a rare combination for bacterial polysaccharides. Emulsifying property was either better or comparable to that of other commercially available natural gums and polysaccharides. SIGNIFICANCE AND IMPACT OF THE STUDY This is probably one of the few reports about characterizing an emulsifying EPS produced by a freshwater sediment-attached bacterium. The results of this study contribute to understand the influence of chemical composition and material properties of a new microbial polysaccharide on its application in industrial biotechnology. Furthermore, this work reconfirms freshwater dynamic sediment as a potential habitat for bioprospecting extracellular polymer-producing bacteria. This study will improve our knowledge on the exploitation of a nonconventional renewable resource, which also seems to be ecologically significant.
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Affiliation(s)
- S R Chowdhury
- Materials Science Centre, Indian Institute of Technology Kharagpur, Kharagpur, WB, India
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Production and characterization of exopolysaccharides and antioxidant from Paenibacillus sp. TKU023. N Biotechnol 2011; 28:559-65. [DOI: 10.1016/j.nbt.2011.03.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2011] [Revised: 02/25/2011] [Accepted: 03/03/2011] [Indexed: 11/23/2022]
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Freitas F, Alves VD, Reis MA. Advances in bacterial exopolysaccharides: from production to biotechnological applications. Trends Biotechnol 2011; 29:388-98. [DOI: 10.1016/j.tibtech.2011.03.008] [Citation(s) in RCA: 482] [Impact Index Per Article: 37.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 03/28/2011] [Accepted: 03/30/2011] [Indexed: 01/27/2023]
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Gauri SS, Archanaa S, Mondal KC, Pati BR, Mandal SM, Dey S. Removal of arsenic from aqueous solution using pottery granules coated with cyst of Azotobacter and portland cement: characterization, kinetics and modeling. BIORESOURCE TECHNOLOGY 2011; 102:6308-6312. [PMID: 21392969 DOI: 10.1016/j.biortech.2011.02.037] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 02/07/2011] [Accepted: 02/08/2011] [Indexed: 05/30/2023]
Abstract
A new low cost adsorbents, pottery granules coated with cyst of Azotobacter and portland cement has been developed for aqueous arsenic removal. The developed granule is solid and porous structure forms a stable complex of Fe-Al-Si-O(2) allied with cyst biomass. Batch experiments were revealed that As removal was up to 96% using PGAC beads, whereas 65% by cyst biomass. Immobilization of cyst biomass to pottery granules through portland cement improved the stability of granules and adsorption capacity. Kinetics studies revealed that Langmuir isotherm was followed with a better correlation than the Freundlich isotherm and adsorption was first order diffusion controlled. Presence of Fe-Al-Si-O(2) and polysaccharide complex on the granule surface may be responsible for the adsorption of arsenic and preferentially binds to biomass containing composite than only biomass. Thus, this recently developed cost-effective novel biocomposite, PGAC granule can be used as household level to mitigate the arsenic problem.
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Affiliation(s)
- Samiran S Gauri
- Central Research Facility, Department of Biotechnology, IIT-Kharagpur, Kharagpur, 721 302 West Bengal, India
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Characterization and emulsifying property of a carbohydrate polymer produced by Bacillus pumilus UW-02 isolated from waste water irrigated agricultural soil. Int J Biol Macromol 2011; 48:705-12. [DOI: 10.1016/j.ijbiomac.2011.02.019] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 02/10/2011] [Accepted: 02/24/2011] [Indexed: 11/15/2022]
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Kanmani P, Satish kumar R, Yuvaraj N, Paari KA, Pattukumar V, Arul V. Production and purification of a novel exopolysaccharide from lactic acid bacterium Streptococcus phocae PI80 and its functional characteristics activity in vitro. BIORESOURCE TECHNOLOGY 2011; 102:4827-4833. [PMID: 21300540 DOI: 10.1016/j.biortech.2010.12.118] [Citation(s) in RCA: 192] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2010] [Revised: 12/30/2010] [Accepted: 12/31/2010] [Indexed: 05/30/2023]
Abstract
Optimum culture conditions which ease the synthesis of a novel exopolysaccharide (EPS) from a potent marine strain Streptococcus phocae was proposed in this study. The strain grows well at 35 °C, pH 7.0 and NaCl (2%) with lactose and yeast extract as best carbon and nitrogen sources. The maximum yield of EPS (11.75 and 12.14 g/L) was obtained in the presence of lactose and yeast extract at a concentration of 20 g/L respectively. EPS was refined by gel filtration chromatography using phenyl Sepharose column which revealed the presence of arabinose, fructose and galactose sugar units with molecular mass about 2.8 × 10(5) Da. Emulsifying and flocculating stability of EPS compared with three commercial hydrocolloids. EPS exhibited better activities which are similar to that of commercial hydrocolloids. Both crude and purified EPS exhibited strong antioxidant potential by quenching hydroxyl and superoxide anion radicals. Antibiofilm activity by inhibition of Gram positive and Gram negative biofilm forming bacteria was evident in our studies. Potential antioxidant activity and biofilm inhibiting property of EPS may lead to the development of novel food grade adjuncts.
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Affiliation(s)
- Paulraj Kanmani
- Department of Biotechnology, School of Life Sciences, Pondicherry University, Pondicherry 605014, India
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Singh RP, Shukla MK, Mishra A, Kumari P, Reddy C, Jha B. Isolation and characterization of exopolysaccharides from seaweed associated bacteria Bacillus licheniformis. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.12.061] [Citation(s) in RCA: 126] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Kavita K, Mishra A, Jha B. Isolation and physico-chemical characterisation of extracellular polymeric substances produced by the marine bacterium Vibrio parahaemolyticus. BIOFOULING 2011; 27:309-317. [PMID: 21409653 DOI: 10.1080/08927014.2011.562605] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A marine bacterial strain identified as Vibrio parahaemolyticus by 16S rRNA gene (HM355955) sequencing and gas chromatography (GC) coupled with MIDI was selected from a natural biofilm by its capability to produce extracellular polymeric substances (EPS). The EPS had an average molecule size of 15.278 μm and exhibited characteristic diffraction peaks at 5.985°, 9.150° and 22.823°, with d-spacings of 14.76661, 9.29989 and 3.89650 Å, respectively. The Fourier-transform infrared spectroscopy (FTIR) spectrum revealed aliphatic methyl, primary amine, halide groups, uronic acid and saccharides. Gas chromatography mass spectrometry (GCMS) confirmed the presence of arabinose, galactose, glucose and mannose. (1)HNMR (nuclear magnetic resonance) revealed functional groups characteristic of polysaccharides. The EPS were amorphous in nature (CI(xrd) 0.092), with a 67.37% emulsifying activity, thermostable up to 250°C and displayed pseudoplastic rheology. MALDI-TOF-TOF analysis revealed a series of masses, exhibiting low-mass peaks (m/z) corresponding to oligosaccharides and higher-mass peaks for polysaccharides consisting of different ratios of pentose and hexose moieties. This is the first report of a detailed characterisation of the EPS produced by V. parahaemolyticus, which could be further explored for biotechnological and industrial use.
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Affiliation(s)
- Kumari Kavita
- Discipline of Marine Biotechnology and Ecology, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, Bhavnagar, Gujarat, India
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Mishra A, Kavita K, Jha B. Characterization of extracellular polymeric substances produced by micro-algae Dunaliella salina. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.08.067] [Citation(s) in RCA: 108] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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