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Caamal-Chan MG, Loera-Muro A, Romero-Geraldo RDJ, Ramírez-Serrano R. Bacterial Strains from Saline Environment Modulate the Expression of Saline Stress-Responsive Genes in Pepper ( Capsicum annuum). PLANTS (BASEL, SWITZERLAND) 2023; 12:3576. [PMID: 37896039 PMCID: PMC10610202 DOI: 10.3390/plants12203576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/05/2023] [Accepted: 10/09/2023] [Indexed: 10/29/2023]
Abstract
Salinity stress is one of the most important problems in crop productivity. Plant growth-promoting bacteria (PGPB) can also confer stress tolerance in plants under saline soil conditions. In a previous work, it was reported that bacteria strains isolated from hypersaline sites mitigated salt stress in chili pepper (Capsicum annuum var. Caballero) plants and promoted plant growth in some cases. The aim of this study was to evaluate the modulation of gene expression in C. annuum plants by bacteria strains isolated from saline environments. Two bacteria strains from high salinity ponds in Guerrero Negro, BCS, Mexico (Bacillus sp. strain 32 and Staphylococcus sp. strain 155) and Azospirillum brasilense Cd (DSM 1843) were used. Significant improvement in fresh weight yield (stem (28%), root (128.9%), and leaves (20%)) was observed in plants inoculated with Bacillus sp. strain 32. qPCR analysis showed that both strains modulated the expression of stress-responsive genes (MYB, ETR1, JAR1, WRKY, and LOX2) as well as heat shock factors and protein genes (CahsfA2, CahsfA3, CahsfB3a, CaDNaJ02, and CaDNaJ04). Finally, the expression levels of genes related to early salt stress and ISR showed differences in plants with dual treatment (bacteria-inoculated and salt-stressed) compared to plants with simple salinity stress. This work confirmed the differential modification of the transcriptional levels of genes observed in plants inoculated with bacteria under salinity stress.
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Affiliation(s)
- María Goretty Caamal-Chan
- CONAHCYT-Centro de Investigaciones Biológicas del Noroeste, SC. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz C.P. 23096, Baja California Sur, Mexico;
| | - Abraham Loera-Muro
- CONAHCYT-Centro de Investigaciones Biológicas del Noroeste, SC. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz C.P. 23096, Baja California Sur, Mexico;
| | - Reyna De Jesús Romero-Geraldo
- Instituto Tecnológico de La Paz, Boulevard Forjadores de Baja California Sur 4720, 8 de Octubre 2da Secc, La Paz C.P. 23080, Baja California Sur, Mexico;
| | - Rogelio Ramírez-Serrano
- Centro de Investigaciones Biológicas del Noroeste, SC. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz C.P. 23096, Baja California Sur, Mexico;
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Das BK, Kumar V, Das P, Nayak KK. De novo whole transcriptome analysis of Aeromonas hydrophila isolated from the gut of an infected Labeo rohita. Front Microbiol 2023; 14:1247652. [PMID: 37779727 PMCID: PMC10539578 DOI: 10.3389/fmicb.2023.1247652] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 08/28/2023] [Indexed: 10/03/2023] Open
Abstract
Aeromonas hydrophila is a major generalist bacterial pathogen causing severe infections and mortalities in aquatic animals. Its genome, which was the first to be sequenced from the Aeromonas genus, may serve as a model for studying pathogenic mechanisms. To explore the pathogen-host fitness mechanism of bacterium, a comprehensive comparative transcriptome ecotype analysis of A. hydrophila isolated from the gut of Labeo rohita during infection was performed. Special characteristics in gene expression, gene ontology terms and expression of pathogenesis-associated genes, including genes encoding secreted proteins, candidate effectors, hydrolases, and proteins involved in secondary metabolite production were revealed. Among the database, 6,533 were gene ontology (GO) annotated, while 1,480 were not allocated in any GO terms. Investigation on GO illustrated that the articulated genes were improved with molecular function, cellular components, and biological processes. Further bioinformatics analysis identified the outer membrane protein genes (ompA, ompts, ompw, omp38, and omp48), cytotoxin, amylase, and lipase genes. Overall, this work allowed to designate, for the first time, a global view on the pathogenicity of Aeromonas hydrophila during infection. Furthermore, the study provides information on the fitness of A. hydrophila, a severe pathogen with a wide host range.
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Affiliation(s)
- Basanta Kumar Das
- Aquatic Environmental Biotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, West Bengal, India
| | - Vikash Kumar
- Aquatic Environmental Biotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, West Bengal, India
| | - Priyanka Das
- Aquatic Environmental Biotechnology Division, ICAR-Central Inland Fisheries Research Institute, Barrackpore, West Bengal, India
| | - Kausalya K. Nayak
- Department of Zoology, K.B.D.A.V. College, Nirakarpur, Odisha, India
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Kalvaitienė G, Vaičiūtė D, Bučas M, Gyraitė G, Kataržytė M. Macrophytes and their wrack as a habitat for faecal indicator bacteria and Vibrio in coastal marine environments. MARINE POLLUTION BULLETIN 2023; 194:115325. [PMID: 37523954 DOI: 10.1016/j.marpolbul.2023.115325] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 08/02/2023]
Abstract
Waterborne pathogenic bacteria, including faecal indicator bacteria and potentially pathogenic Vibrio, are a global concern for diseases transmitted through water. A systematic review was conducted to analyse publications that investigated these bacteria in relation to macrophytes (seagrasses and macroalgae) in coastal marine environments. The highest quantities of FIB were found on brown algae and seagrasses, and the highest quantities of Vibrio bacteria were on red algae. The most extensively studied macrophyte group was brown algae, green algae were the least researched. Macrophyte wrack was found to favor the presence of FIB, but there is a lack of information about Vibrio quantities in this environment. To understand the role of Vibrio bacteria that are pathogenic to humans, molecular methods complementary to cultivation methods should be used. Further research is needed to understand the underlying mechanisms of FIB and potentially pathogenic Vibrio with macrophytes and their microbiome in the coastal marine environment.
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Affiliation(s)
- Greta Kalvaitienė
- Klaipėda University, Marine Research Institute, University Avenue 17, 92295 Klaipėda, Lithuania.
| | - Diana Vaičiūtė
- Klaipėda University, Marine Research Institute, University Avenue 17, 92295 Klaipėda, Lithuania.
| | - Martynas Bučas
- Klaipėda University, Marine Research Institute, University Avenue 17, 92295 Klaipėda, Lithuania.
| | - Greta Gyraitė
- Klaipėda University, Marine Research Institute, University Avenue 17, 92295 Klaipėda, Lithuania.
| | - Marija Kataržytė
- Klaipėda University, Marine Research Institute, University Avenue 17, 92295 Klaipėda, Lithuania.
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4
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Metwally RA, El Nady J, Ebrahim S, El Sikaily A, El-Sersy NA, Sabry SA, Ghozlan HA. Biosynthesis, characterization and optimization of TiO 2 nanoparticles by novel marine halophilic Halomonas sp. RAM2: application of natural dye-sensitized solar cells. Microb Cell Fact 2023; 22:78. [PMID: 37085834 PMCID: PMC10122347 DOI: 10.1186/s12934-023-02093-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 04/11/2023] [Indexed: 04/23/2023] Open
Abstract
BACKGROUND Metal oxide nanoparticles (NPs) are becoming valuable due to their novel applications. The green synthesis of TiO2 NPs is more popular as a flexible and eco-friendly method compared to traditional chemical synthesis methods. TiO2 NPs are the most commonly used semiconductor in dye-sensitized solar cells (DSSCs). RESULTS The biogenic TiO2 NPs were produced extracellularly by the marine halophilic bacterium Halomonas sp. RAM2. Response surface methodology (RSM) was used to optimize the biosynthesis process, resulting in a starting TiO2 concentration of 0.031 M and a pH of 5 for 92 min (⁓15 nm). TiO2 NPs were well-characterized after the calcination process at different temperatures of 500, 600, 700 and 800 °C. Anatase TiO2 NPs (calcined at 500 °C) with a smaller surface area and a wider bandgap were nominated for use in natural dye-sensitized solar cells (NDSSCs). The natural dye used as a photosensitizer is a mixture of three carotenoids extracted from the marine bacterium Kocuria sp. RAM1. NDSSCs were evaluated under standard illumination. After optimization of the counter electrode, NDSSCBio(10) (10 layers) demonstrated the highest photoelectric conversion efficiency (η) of 0.44%, which was almost as good as NDSSCP25 (0.55%). CONCLUSION The obtained results confirmed the successful green synthesis of TiO2 NPs and suggested a novel use in combination with bacterial carotenoids in DSSC fabrication, which represents an initial step for further efficiency enhancement studies.
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Affiliation(s)
- Rasha A Metwally
- Marine Microbiology Lab., National Institute of Oceanography and Fisheries, NIOF, Alexandria, Egypt.
| | - Jehan El Nady
- Electronic Materials Department, Advanced Technology and New Materials Research Institute, City of Scientific Research and Technological Applications (SRTA-City), New Borg El-Arab City, Alexandria, Egypt
| | - Shaker Ebrahim
- Department of Materials Science, Institute of Graduate Studies and Research, Alexandria University, Alexandria, Egypt
| | - Amany El Sikaily
- Marine Pollution Lab., National Institute of Oceanography and Fisheries, NIOF, Alexandria, Egypt
| | - Nermeen A El-Sersy
- Marine Microbiology Lab., National Institute of Oceanography and Fisheries, NIOF, Alexandria, Egypt
| | - Soraya A Sabry
- Botany & Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
| | - Hanan A Ghozlan
- Botany & Microbiology Department, Faculty of Science, Alexandria University, Alexandria, Egypt
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Duan M, Yan R, Wang Q, Zhou B, Zhu H, Liu G, Guo X, Zhang Z. Integrated microbiological and metabolomics analyses to understand the mechanism that allows modified biochar to affect the alkalinity of saline soil and winter wheat growth. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 866:161330. [PMID: 36603639 DOI: 10.1016/j.scitotenv.2022.161330] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/27/2022] [Accepted: 12/28/2022] [Indexed: 06/17/2023]
Abstract
In order to understand the mechanism that allows modified biochar (BC) to enhance the salt tolerance and growth of crops in saline-alkali soil, we tested the effects of ordinary BC, nanoparticle-size BC, acidified BC (HBC), and acidified nanoparticle-size BC on winter wheat growth and the soil properties by combining microbiological and metabolomics analyses. The results showed that compared with the control with no BC, the plant height increased by 17.33 % under HBC and the proportion of large soil aggregates increased by 1.25-2.83 times. HBC increased the relative abundances of some dominant genera of bacteria (e.g., Streptococcus) and fungi (e.g., Mycothermus), as well as functions such as bacterial metabolic genetic information processing and cellular processes, and reduced the abundance of pathotrophic fungi. Metabolomics analysis showed that HBC upregulated various metabolites (including amino acids and their derivatives, lipids, flavonoids, and organic acids) and five main metabolic pathways. Among the KEGG pathways, the pyrimidine metabolism pathway was significantly upregulated, as well as crop leaf metabolism, β-alanine metabolism, and valine, leucine, and isoleucine metabolism, and the antioxidant levels and resistance to salt-alkali stress were enhanced in winter wheat leaves. Partial least squares-path modeling suggested that HBC affected the growth of winter wheat by significantly changing the soil physicochemical properties and microbial structure (path coefficients of 0.566 and 0.512, respectively).
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Affiliation(s)
- Manli Duan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Rupan Yan
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Quanjiu Wang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Beibei Zhou
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
| | - Hongyan Zhu
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
| | - Guohuan Liu
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Xu Guo
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China
| | - Zhenshi Zhang
- Northwest Engineering Corporation Limited Power China, Xi'an 710065, China
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Rawi NN, Ramzi MM, Rahman NIA, Ariffin F, Saidin J, Bhubalan K, Mazlan NW, Zin NAM, Siong JYF, Bakar K, Azemi AK, Ismail N. Antifouling Potential of Ethyl Acetate Extract of Marine Bacteria Pseudomonas aeruginosa Strain RLimb. Life (Basel) 2023; 13:life13030802. [PMID: 36983957 PMCID: PMC10053361 DOI: 10.3390/life13030802] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2023] [Revised: 03/11/2023] [Accepted: 03/13/2023] [Indexed: 03/18/2023] Open
Abstract
Biofouling is defined as the excessive colonization process of epibiotic organisms, ranging from microfoulers to macrofoulers, on any submerged surface in water. Previous research has attempted to explore the antifouling activity of bacterial isolates due to the biofouling problems occurring worldwide. One solution is to inhibit the early stage of fouling using secondary metabolites produced by marine bacteria. This study aims to determine the antifouling activities of the marine microorganism P. aeruginosa and to characterize the bacteria isolated as a potential anti-biofouling agent. The bacterial isolate was cultured and isolated on a media culture. The bacteria culture extract was extracted using ethyl acetate and concentrated prior to the bioassay method. It was screened for antibacterial activities against Gram-positive and Gram-negative bacteria, such as Bacillus cereus, Streptococcus uberis, Pseudomonas sp., and Vibrio parahaemolyticus, using the disk diffusion technique. The extract was investigated to verify its bioactivity in the prevention of biofilm formation following the crystal violet assay and aquarium test. The results indicated the inhibition of activity through biofilm formation, with the highest percentage at 83% of biofilm inhibition at a concentration of 0.1563 mg/mL. The bacterial isolate at a concentration of 5% showed the highest reduction in bacteria colonies in the aquarium test (161.8 × 103 CFU/mL compared to 722.5 × 103 CFU/mL for the blank sample). The bacterial isolate was characterized through phenotypic and genotypic tests for species identification. It was identified as a Gram-stain-negative, aerobic, and long-rod-shaped bacteria, designated as RLimb. Based on the 16S rDNA gene sequencing analysis, RLimb was identified as Pseudomonas aeruginosa (accession number: OP522351), exhibiting a similarity of 100% to the described neighbor P. aeruginosa strain DSM 50071. These results indicated that these isolated bacteria can potentially be used as a substitute for toxic antifoulants to prevent the formation of microfoulers.
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Affiliation(s)
- Nurul Najihah Rawi
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Mujahidah Mohd Ramzi
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Nor Izzati Abd Rahman
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Fazilah Ariffin
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia; (F.A.); (N.W.M.)
| | - Jasnizat Saidin
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Kesaven Bhubalan
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia; (F.A.); (N.W.M.)
| | - Noor Wini Mazlan
- Faculty of Science and Marine Environment, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia; (F.A.); (N.W.M.)
| | - Nor Atikah Mohd Zin
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Julius Yong Fu Siong
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Kamariah Bakar
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
| | - Ahmad Khusairi Azemi
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
- Correspondence: (A.K.A.); (N.I.); Tel.: +60-96683240 (N.I.)
| | - Noraznawati Ismail
- Institute of Marine Biotechnology, Universiti Malaysia Terengganu, Kuala Terengganu 21030, Terengganu, Malaysia (J.S.); (K.B.); (N.A.M.Z.); (J.Y.F.S.); (K.B.)
- Correspondence: (A.K.A.); (N.I.); Tel.: +60-96683240 (N.I.)
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Muralidharan M, Gayathri KV, Kumar PS, Preethi DS, Kavitha R, Rajagopal R, Rangasamy G. Mixed polyaromatic hydrocarbon degradation by halotolerant bacterial strains from marine environment and its metabolic pathway. ENVIRONMENTAL RESEARCH 2023; 216:114464. [PMID: 36208785 DOI: 10.1016/j.envres.2022.114464] [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: 06/19/2022] [Revised: 09/10/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
Accidents involving diesel oil spills are prevalent in sea- and coastal regions. Polycyclic aromatic hydrocarbons (PAHs) can be adsorbed in soil and constitute a persistent contaminant due to their poor water solubility and complex breakdown. PAHs pollution is a pervasive environmental concern that poses serious risks to human life and ecosystems. Thus, it is the need of the hour to degrade and decontaminate the toxic pollutant to save the environment. Among all the available techniques, microbial degradation of the PAHs is proving to be greatly beneficial and effective. Bioremediation overcomes the drawbacks of most physicochemical procedures by eliminating numerous organic pollutants at a lower cost in ambient circumstances and has therefore become a prominent remedial option for pollutant removal, including PAHs. In the present study, we have studied the degradation of Low molecular Weight and High Molecular Weight PAH in combination by bacterial strains isolated from a marine environment. Optimum pH, temperature, carbon, and nitrogen sources, NaCl concentrations were found for efficient degradation using the isolated bacterial strains. At 250 mg/L concentration of the PAH mixture an 89.5% degradation was observed. Vibrio algiolytcus strains were found to be potent halotolerant bacteria to degrade complex PAH into less toxic simple molecules. GC-MS and FTIR data were used to probe the pathway of degradation of PAH.
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Affiliation(s)
- Manasa Muralidharan
- Department of Biotechnology, Stella Maris College (Autonomous), Chennai, India
| | - K Veena Gayathri
- Department of Biotechnology, Stella Maris College (Autonomous), Chennai, India.
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam-603110, Tamil Nadu, India; Centre of Excellence in Water Research (CEWAR), Sri Sivasubramaniya Nadar College of Engineering, Kalavakkam-603110, Tamil Nadu, India; School of Engineering, Lebanese American University, Byblos, Lebanon; Department of Biotechnology Engineering and Food Technology, Chandigarh University, Mohali, 140413, India.
| | - D S Preethi
- Department of Biotechnology, Stella Maris College (Autonomous), Chennai, India
| | - R Kavitha
- Department of Chemistry, Stella Maris College (Autonomous), Chennai, India; Department of Chemistry, Madras Christian College (Autonomous), Chennai, India
| | - Revathy Rajagopal
- Department of Chemistry, Stella Maris College (Autonomous), Chennai, India
| | - Gayathri Rangasamy
- Department of Sustainable Engineering, Institute of Biotechnology, Saveetha School of Engineering, SIMATS, Chennai 602105, India
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Olicón-Hernández DR, Guerra-Sánchez G, Porta CJ, Santoyo-Tepole F, Hernández-Cortez C, Tapia-García EY, Chávez-Camarillo GM. Fundaments and Concepts on Screening of Microorganisms for Biotechnological Applications. Mini Review. Curr Microbiol 2022; 79:373. [PMID: 36302918 DOI: 10.1007/s00284-022-03082-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Accepted: 10/08/2022] [Indexed: 11/25/2022]
Abstract
Microbial biotechnology uses microorganisms and their derivatives to generate industrial and/or environmental products that impact daily life. Modern biotechnology uses proteomics, metabolomics, quantum processors, and massive sequencing methods to yield promising results with microorganisms. However, the fundamental concepts of microbial biotechnology focus on the specific search for microorganisms from natural sources and their correct analysis to implement large-scale processes. This mini-review focuses on the methods used for the isolation and selection of microorganisms with biotechnological potential to empathize the importance of these concepts in microbial biotechnology. In this work, a review of the state of the art in recent years on the selection and characterization of microorganisms with a basic approach to understanding the importance of fundamental concepts in the field of biotechnology was carried out. The proper selection of isolation sources and the design of suitable selection criteria according to the desired activity have generated substantial changes in the development of biotechnology for more than three decades. Some examples include Taq polymerase in the PCR method and CRISPR technology. The objective of this mini review is to establish general ideas for the screening of microorganisms based on basic concepts of biotechnology that are left aside in several articles and maintain the importance of the basic concepts that this implies in the development of modern biotechnology.
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Affiliation(s)
- Dario R Olicón-Hernández
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México.
| | - Guadalupe Guerra-Sánchez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México
| | - Carla J Porta
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México
| | - Fortunata Santoyo-Tepole
- Departamento de Investigación, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México
| | - Cecilia Hernández-Cortez
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México
| | - Erika Y Tapia-García
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México
| | - Griselda Ma Chávez-Camarillo
- Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, Carpio y Plan de Ayala S/N, Colonia Santo Tomas, 11340, Ciudad de México, México
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9
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Kumar V, Roy S, Behera BK, Swain HS, Das BK. Biofloc Microbiome With Bioremediation and Health Benefits. Front Microbiol 2021; 12:741164. [PMID: 34912305 PMCID: PMC8667556 DOI: 10.3389/fmicb.2021.741164] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 10/25/2021] [Indexed: 12/29/2022] Open
Abstract
The biofloc system has recently attracted great attention as a cost-effective, sustainable, and environmentally friendly technology and expected to contribute toward human food security (Zero Hunger SDG 2). It is also expected that this endeavor can be adopted widely because of its characteristics of zero water exchange and reduced artificial feeding features. In the biofloc system, the flocs which are generally formed by aggregation of heterotrophic microorganisms, serve as natural bioremediation candidates. These microbes effectively maintain water quality by utilizing the nutrient wastes, mostly originated from digested, unconsumed, and metabolic processes of feed. Additionally, the flocs are important sources of nutrients, mainly a protein source, and when these are consumed by aquaculture animals they improve the growth performance, immunity, and disease tolerance of host against pathogenic microbial infection. Here in this review, we focus on recent advances that could provide a mechanistic insight on how the microbial community developed in the biofloc system helps in the bioremediation process and enhances the overall health of the host. We have also tried to address the possible role of these microbial communities against growth and virulence of pathogenic microbes.
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Affiliation(s)
- Vikash Kumar
- Aquatic Environmental Biotechnology and Nanotechnology (AEBN) Division, ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, India
| | - Suvra Roy
- Aquatic Environmental Biotechnology and Nanotechnology (AEBN) Division, ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, India
| | - Bijay Kumar Behera
- Aquatic Environmental Biotechnology and Nanotechnology (AEBN) Division, ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, India
| | - Himanshu Sekhar Swain
- Fisheries Enhancement and Management (FEM) Division, ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, India
| | - Basanta Kumar Das
- ICAR-Central Inland Fisheries Research Institute (CIFRI), Barrackpore, India
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10
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Prevalence of enterotoxin genes and antibacterial susceptibility pattern of pathogenic bacteria isolated from traditionally preserved fish products of Sikkim, India. Food Control 2021. [DOI: 10.1016/j.foodcont.2021.108009] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Benladghem Z, Seddiki SML, Mahdad YM. Identification of bacterial biofilms on desalination reverse osmosis membranes from the mediterranean sea. BIOFOULING 2020; 36:1065-1073. [PMID: 33233947 DOI: 10.1080/08927014.2020.1851366] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 11/08/2020] [Accepted: 11/10/2020] [Indexed: 06/11/2023]
Abstract
Nanofiltration and reverse osmosis are two of the most effective surface water treatment processes. They provide water of high quality and eliminate a large amount of microorganisms, organic matter and micropollutants. However, the main limitation of membrane nanofiltration is fouling, which imposes an additional cost. This study focused on the search for microorganisms capable of reducing the performance of nanofilters and also to study autoaggregation and biofilms formation by bacterial strains isolated from the nanomembranes used in the seawater desalination plant of Souk Tlata (Algeria). It provides new microbiological data on the desalination of seawater in the southern Mediterranean basin. The results revealed 14 bacterial species isolated from six fouled reverse osmosis membranes; their quantities were significant with the dominance of Raoultella sp., Klebsiella sp., Staphylococcus sp., Stenotrophomonas sp., Micrococcus sp., and Escherichia coli. In addition, electron imaging of nanomembrane surfaces revealed complex structures of microorganisms forming biofilms.
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Affiliation(s)
- Zakaria Benladghem
- LAPSAB Lab: Antifungal Antibiotic, Physico-Chemical Synthesis and Biological Activity, University of Tlemcen, Tlemcen, Algeria
| | - Sidi Mohamed Lahbib Seddiki
- LAPSAB Lab: Antifungal Antibiotic, Physico-Chemical Synthesis and Biological Activity, University of Tlemcen, Tlemcen, Algeria
- Department of Biology, University Center of Naâma, Naâma, Algeria
| | - Yassine Moustafa Mahdad
- Department of Biology, University Center of Naâma, Naâma, Algeria
- PPABIONUT Lab: Physiology, Physiopathology and Biochemistry of Nutrition, University of Tlemcen, Tlemcen, Algeria
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