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Li Q, Hu H, Tan X, Wang J, Mei R, Jiang F, Ling Y, Li X. Effects of Storage in an Active and Spontaneous Controlled O 2/CO 2 Atmosphere on Volatile Flavor Components and the Microbiome of Truffles. ACS OMEGA 2024; 9:9331-9347. [PMID: 38434872 PMCID: PMC10905597 DOI: 10.1021/acsomega.3c08375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/29/2024] [Accepted: 01/31/2024] [Indexed: 03/05/2024]
Abstract
This study explored the potential to improve the storage quality and prolong the shelf life of truffles by storing them in a modified atmosphere fresh-keeping box with sealed gas components of Active Modified Atmosphere Packaging (AMAP, 40% O2 + 60% CO2) at 4 °C. During the storage period, a total of 63 volatile components in 10 categories were detected, with aldehydes being the most abundant and the relative content of ethers being the highest. The relative odor activity value and principal component analysis revealed that isovaleraldehyde, 1-octen-3-ol, 1-octen-3-one, and dimethyl sulfide were the characteristic flavor components of fresh truffles. However, 3-methylthiopropionaldehyde and (E, E)-2,4-nonadienal were the components that caused the deterioration of truffle flavor and could potentially serve as markers of truffle decay characteristics. 16S rDNA high-throughput sequencing showed that Leuconostoc and Lactococcus were dominant in the truffle samples stored for 14 days, but the abundance of putrefactive pathogenic bacteria showed an increasing trend in the truffle samples stored for 28 days. During the whole storage period, the common fungi detected in the different treatment groups were Candida and Aspergillus. The relative abundance of the former decreased, while the relative abundance of the latter decreased initially and then increased. The correlation between volatile components and the microbial flora was further analyzed, which indicated that Lactococcus and Lactobacillus had the same contributions to the same flavor, while Pseudomonas and Glutamicibacter had the opposite contributions to the same flavor. The results provide a reference for the storage and preservation of truffles.
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Affiliation(s)
- Qiang Li
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Haiyang Hu
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Xingyi Tan
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Jianhui Wang
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Ruhuai Mei
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Fangguo Jiang
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Yunkun Ling
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
| | - Xiang Li
- School of Food and Biological
Engineering, Chengdu University, Chengdu, Sichuan 610106, China
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Fugaban JII, Jung ES, Todorov SD, Holzapfel WH. Evaluation of Antifungal Metabolites Produced by Lactic Acid Bacteria. Probiotics Antimicrob Proteins 2023; 15:1447-1463. [PMID: 36227534 DOI: 10.1007/s12602-022-09995-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/23/2022] [Indexed: 11/29/2022]
Abstract
This study aimed to select and characterize lactic acid bacteria (LAB) with potential antifungal activities against the filamentous fungi Alternaria alternata ATCC MYA-4642, Aspergillus flavus KACC 45470, Aspergillus niger KACC 42589, Cladosporium sphaerospermum ATCC MYA-4645, Penicillium chrysogenum ATCC MYA-4644, and Penicillium expansum KACC 40815. Initial screening of the antifungal activity has identified six LAB strains belonging to the genera Enterococcus and Leuconostoc, selected by their antagonistic activities against at least three of the filamentous fungi in the test panel. Preliminary prediction of bioactive compounds was carried out to narrow down the possible identity of the antagonistic metabolites produced by the studied LAB. Furthermore, metabolic profiles were assessed and used as a basis for the identification of key metabolites based on VIP scores and PCA plot scores. Key metabolites were identified to be β-phenyllactic acid, ⍺-hydroxyisobutyric acid, 1,3-butanediol, phenethylamine, and benzoic acid. Individual assessment of each metabolic compound against the test panel showed specificity inhibitory patterns; yet, combinations between them only showed additive, but not synergetic effects. The pH neutralization significantly reduced the antifungal activity of the cell-free supernatant (CFS), but no bioactive compounds were found to be stable in high temperatures and pressure. This study will be beneficial as an additional building block on the existing knowledge and future antifungal application of LAB produced metabolites. Furthermore, this study also provides a new bio-preservative perspective on unexplored antifungal metabolites produced by LAB as biocontrol agents.
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Affiliation(s)
- Joanna Ivy Irorita Fugaban
- ProBacLab Laboratory, Department of Advanced Convergence, Handong Global University, Handong-ro, Heunghae-eup, Gyeong-buk, Pohang, 37554, Republic of Korea
- Current address: National Food Institute, Technical University of Denmark, Kemitorvet, Kongens Lyngby, Denmark
| | - Eun Sung Jung
- HEMPharma Inc., 77, Changnyong-daero 256 Beon-gil, Suwon-si, Gyeonggi-do, 16229, Republic of Korea
| | - Svetoslav Dimitrov Todorov
- ProBacLab Laboratory, Department of Advanced Convergence, Handong Global University, Handong-ro, Heunghae-eup, Gyeong-buk, Pohang, 37554, Republic of Korea.
- ProBacLab, Laboratório de Microbiologia de Alimentos, Departamento de Alimentos E Nutrição Experimental, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, SP, Brazil.
| | - Wilhelm Heinrich Holzapfel
- ProBacLab Laboratory, Department of Advanced Convergence, Handong Global University, Handong-ro, Heunghae-eup, Gyeong-buk, Pohang, 37554, Republic of Korea
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Stupar J, Hoel S, Strømseth S, Lerfall J, Rustad T, Jakobsen AN. Selection of lactic acid bacteria for biopreservation of salmon products applying processing-dependent growth kinetic parameters and antimicrobial mechanisms. Heliyon 2023; 9:e19887. [PMID: 37810133 PMCID: PMC10559289 DOI: 10.1016/j.heliyon.2023.e19887] [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: 08/10/2023] [Revised: 08/31/2023] [Accepted: 09/04/2023] [Indexed: 10/10/2023] Open
Abstract
Biopreservation using lactic acid bacteria (LAB) is a promising technology to prevent the growth of pathogenic microorganisms in fresh and mildly processed food. The main aim of this study was to select LAB, originally isolated from ready-to-eat (RTE) seafood, for biopreservation of fresh salmon and processed salmon products. Ten LAB strains (five Carnobacterium and five Leuconostoc) were selected based on previously demonstrated bioprotective properties to investigate their antimicrobial mechanisms and temperature-dependent growth kinetics in a sterile salmon juice model system. Furthermore, five strains (three Carnobacterium and two Leuconostoc) were selected to test process-dependent growth kinetic parameters relevant to the secondary processing of salmon. Two strains (Carnobacterium maltaromaticum 35 and C. divergens 468) showed bacteriocin-like activity against Listeria innocua, while inhibitory effect of cell-free supernatants (CFS) was not observed against Escherichia coli. All selected strains were able to grow in sterile salmon juice at tested temperatures (4, 8, 12 and 16 °C), with specific growth rates (μ) ranging from 0.01 to 0.04/h at 4 °C and reaching a maximum population density of 8.4-9 log CFU/ml. All five strains tested for process-dependent growth kinetic parameters were able to grow in the range of 0.5-5% NaCl and 0.13-0.26% purified condensed smoke (VTABB and JJT01), with inter- and intraspecies variation in growth kinetics. According to the temperature-dependent growth kinetics and antimicrobial assay results, two strains, Leuconostoc mesenteroides 68 (Le.m.68) and C. divergens 468 (C d.468), were selected for in situ test to validate their ability to grow in vacuum-packed fresh salmon at 4 °C. Both strains were able to grow at maximum growth rates of 0.29 ± 0.04/d for Le. m.68 and 0.39 ± 0.06/d for C.d.468, and their final concentrations were 7.91 ± 0.31 and 8.02 ± 0.25 log CFU/g, respectively. This study shows that LAB, originally isolated from RTE seafood, have promising potential as bioprotective strains in fresh and processed salmon products.
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Affiliation(s)
- Jelena Stupar
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, NO-7491, Trondheim, Norway
| | - Sunniva Hoel
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, NO-7491, Trondheim, Norway
| | - Sigrid Strømseth
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, NO-7491, Trondheim, Norway
| | - Jørgen Lerfall
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, NO-7491, Trondheim, Norway
| | - Turid Rustad
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, NO-7491, Trondheim, Norway
| | - Anita Nordeng Jakobsen
- Norwegian University of Science and Technology, Department of Biotechnology and Food Science, NO-7491, Trondheim, Norway
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Yoo JM, Song JH, Vasquez R, Hwang IC, Lee JS, Kang DK. Characterization of Novel Amylase-Sensitive, Anti-Listerial Class IId Bacteriocin, Agilicin C7 Produced by Ligilactobacillus agilis C7. Food Sci Anim Resour 2023; 43:625-638. [PMID: 37483999 PMCID: PMC10359839 DOI: 10.5851/kosfa.2023.e24] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 06/06/2023] [Accepted: 06/07/2023] [Indexed: 07/25/2023] Open
Abstract
Among various biological agents, bacteriocins are important candidates to control Listeria monocytogenes which is a foodborne pathogen. In this study, a novel bacteriocin, named agilicin C7, was isolated from Ligilactobacillus agilis C7 showing inhibitory activity against L. monocytogenes. Agilicin C7 biosynthesis gene was characterized by bioinformatics analyses and heterologously expressed in Escherichia coli for further study. The anti-listeria activity of recombinant agilicin C7 (r-agilicin C7) was lost by proteases and α-amylase, suggesting that agilicin C7 is a glycoprotein. r-Agilicin C7 has wide pH and thermal stability and is also stable in various organic solvents. It destroyed L. monocytogenes by damaging the integrity of the cell envelope. These properties of r-agilicin C7 indicate that agilicin C7 is a novel amylase-sensitive anti-listerial Class IId bacteriocin. Physicochemical stability and inhibitory activity against L. monocytogenes of r-agilicin C7 suggest that it can be applied to control L. monocytogenes in the food industry, including dairy and meat products.
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Affiliation(s)
- Jeong Min Yoo
- Department of Animal Biotechnology,
College of Biotechnology and Bioengineering, Dankook
University, Cheonan 31116, Korea
| | - Ji Hoon Song
- Department of Animal Biotechnology,
College of Biotechnology and Bioengineering, Dankook
University, Cheonan 31116, Korea
| | - Robie Vasquez
- Department of Animal Biotechnology,
College of Biotechnology and Bioengineering, Dankook
University, Cheonan 31116, Korea
| | - In-Chan Hwang
- Department of Animal Biotechnology,
College of Biotechnology and Bioengineering, Dankook
University, Cheonan 31116, Korea
| | - Jae Seung Lee
- Department of Animal Biotechnology,
College of Biotechnology and Bioengineering, Dankook
University, Cheonan 31116, Korea
| | - Dae-Kyung Kang
- Department of Animal Biotechnology,
College of Biotechnology and Bioengineering, Dankook
University, Cheonan 31116, Korea
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Muthusamy K, Han HS, Soundharrajan I, Jung JS, Valan Arasu M, Choi KC. A Novel Strain of Probiotic Leuconostoc citreum Inhibits Infection-Causing Bacterial Pathogens. Microorganisms 2023; 11:microorganisms11020469. [PMID: 36838434 PMCID: PMC9958635 DOI: 10.3390/microorganisms11020469] [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: 01/13/2023] [Revised: 02/08/2023] [Accepted: 02/11/2023] [Indexed: 02/15/2023] Open
Abstract
Infectious diseases caused by bacteria are at risk of spreading and prolonging due to antimicrobial resistance. It is, therefore, urgently necessary to develop a more effective antibiotic alternative strategy to control pathogen spread. In general, probiotics have been recommended as a substitute for antibiotics that inhibit pathogens. This study was isolated and probiotic characteristics and antibacterial bacterial efficiency against various infection-causing pathogens were determined by different in vitro methods. A 16S rRNA sequence confirmed that the isolated strains belonged to a species of Leuconostoc citreum. L. citreum KCC-57 and KCC-58 produced various extracellular enzymes and fermented different carbohydrates. There was significant tolerance for both strains under the harsh conditions of the gastrointestinal tract (GIT). In addition, L. citreum KCC-57 and L. citreum KCC-58 showed significant auto-aggregations and hydrophobicity properties that varied with incubation time. Moreover, the cell-free secondary supernatant (CFS) of L. citreum KCC-57 and L. citreum KCC-58 inhibited growth of Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa and Staphylococcus aureus. According to a co-culture study, L. citreum KCC-57 and L. citreum KCC-58 were highly competitive for pathogen growth. L. citreum KCC-57 and L. citreum KCC-58 showed significant probiotic potential and strong antibacterial activities against different pathogens, suggesting that these strains could be used instead of antibiotics to control infectious pathogens.
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Affiliation(s)
- Karnan Muthusamy
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
| | - Hyo-Shim Han
- Department of Biotechnology, Sunchon University, Suncheon 540742, Republic of Korea
| | - Ilavenil Soundharrajan
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
| | - Jeong-Sung Jung
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
| | - Mariadhas Valan Arasu
- Department of Botany and Microbiology, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
| | - Ki-Choon Choi
- Grassland and Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 31000, Republic of Korea
- Correspondence: ; Tel.: +82-41-580-6752; Fax: +82-41-580-6779
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Exploring the Core Microbiota of Four Different Traditional Fermented Beverages from the Colombian Andes. FERMENTATION 2022. [DOI: 10.3390/fermentation8120733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Fermentation is an ancient process used to prepare and preserve food. Currently, fermented beverages are part of the culture of people living in the Colombian Andean Region, and they are a vital part of their cosmology and ancestral vision. Chicha, Forcha, Champús, and Masato are some of the most common Colombian Andes region’s traditional fermented beverages. These drinks come from the fermentation of maize (Zea maize), but other cereals such as wheat or rye, could be used. The fermentation is carried out by a set of bacteria and yeasts that provide characteristic organoleptic properties of each beverage. In this work, the information collected from the metagenomics analyses by sequencing ITS 1-4 (Internal Transcriber Spacer) and the 16S ribosomal gene for fungi and the V3-V4 region of the rDNA for bacteria allowed us to identify the diversity present in these autochthonous fermented beverages made with maize. The sequencing analysis showed the presence of 39 bacterial and 20 fungal genera. In addition, we determined that only nine genera of bacteria and two genera of fungi affect the organoleptic properties of smell, colour, and flavour, given the production of compounds such as lactic acid, alcohol, and phenols, highlighting the critical role of these microorganisms. Our findings provide new insights into the core microbiota of these beverages, represented by Lactobacillus fermentum, Acetobacter pasteurianus, and Saccharomyces cerevisiae.
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Ben Farhat L, Aissaoui N, Torrijos R, Luz C, Meca G, Abidi F. Correlation between metabolites of lactic acid bacteria isolated from dairy traditional fermented Tunisian products and antifungal and antioxidant activities. J Appl Microbiol 2022; 133:3069-3082. [PMID: 35924966 DOI: 10.1111/jam.15763] [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: 04/08/2022] [Revised: 07/11/2022] [Accepted: 08/02/2022] [Indexed: 12/01/2022]
Abstract
AIMS The objective of this study is to identify and investigate the antifungal and antioxidant potential of lactic acid bacteria (LAB) isolated from traditional fermented products. METHODS AND RESULTS In this work, a collection of LAB was isolated from traditional fermented products collected in four Tunisian regions. After first screening using the overlay method, seven bacterial strains were retained due to their high antifungal effect. Four strains of Limosilactobacillus fermentum were identified, one strain of Lacticaseibacillus paracasei, one strain of Lacticaseibacillus rhamnosus and one strain of Enterococcus faecium. The antifungal as well as the antioxidant potential of these bacteria were then evaluated. Bacterial strains were effective against six fungal strains with a minimum inhibitory concentrations ranging from 25 to 100 mg/mL and a minimum fungicidal concentrations ranging from 50 to 200 mg/mL. Cell free supernatants of LAB were analyzed by HPLC-DAD and LC-MS-qTOF-MS analysis. Results showed significant production of organic acids as well as several phenolic compounds. Correlation analysis confirmed that PLA and 1,2-Dihydroxybenzene were positively correlated with antifungal potential. The results of the antioxidant activity highlighted an ABTS radical cation scavenging activity ranging from 49% to 57% and a DPPH trapping percentage ranging from 80% to 97%. CONCLUSIONS Therefore, due to these characteristics, identified lactic acid bacteria strains have shown their effectiveness to perform as antifungal and antioxidant agents. SIGNIFICANCE AND IMPACT OF THE STUDY Since microbial contamination is at the root of extensive losses in the food sector, the identified strains or their metabolites can potentially be used as additives to limit microorganism spoilage in food products and increase their shelf life.
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Affiliation(s)
- Leila Ben Farhat
- University of Carthage, INSAT, Laboratory of Protein Engineering and Bioactive Molecules (LR11ES24), BP 676, 1080 Cedex, Tunisia.,University of València, Faculty of Pharmacy, Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine Department, Nutrition and Food Science Area, Avda. Vicent Andrés Estellés, 46100 Burjassot, València, Spain
| | - Neyssene Aissaoui
- University of Carthage, INSAT, Laboratory of Protein Engineering and Bioactive Molecules (LR11ES24), BP 676, 1080 Cedex, Tunisia
| | - Raquel Torrijos
- University of València, Faculty of Pharmacy, Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine Department, Nutrition and Food Science Area, Avda. Vicent Andrés Estellés, 46100 Burjassot, València, Spain
| | - Carlos Luz
- University of València, Faculty of Pharmacy, Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine Department, Nutrition and Food Science Area, Avda. Vicent Andrés Estellés, 46100 Burjassot, València, Spain
| | - Giuseppe Meca
- University of València, Faculty of Pharmacy, Preventive Medicine and Public Health, Food Science, Toxicology and Forensic Medicine Department, Nutrition and Food Science Area, Avda. Vicent Andrés Estellés, 46100 Burjassot, València, Spain
| | - Ferid Abidi
- University of Carthage, INSAT, Laboratory of Protein Engineering and Bioactive Molecules (LR11ES24), BP 676, 1080 Cedex, Tunisia
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Garmasheva IL, Oleschenko LT. A comparative study of antagonistic activity spectra of lactic acid bacteria isolated from fermented foods. Lett Appl Microbiol 2022; 75:991-999. [PMID: 35716374 DOI: 10.1111/lam.13773] [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: 01/18/2022] [Revised: 06/09/2022] [Accepted: 06/13/2022] [Indexed: 11/27/2022]
Abstract
The present work aimed to assess the general antagonistic activity against opportunistic pathogens and to compare antagonistic action spectra of lactic acid bacteria (LAB) strains, isolated from Ukrainian traditional fermented foods. Overall, 161 profiles of the antagonistic activity spectrum were obtained from 1056 LAB strains. Among them, 114 profiles were genus-specific and 47 spectra of antagonistic activity were found in LAB strains of different genera. Furthermore, 19 LAB strains were active only against Gram-negative indicator strains and 149 LAB strains only against Gram-positive indicator strains. The size of growth inhibition zones of indicator strains by LAB strains of each genus did not correlate with the level of acidification. Zones of growth inhibition of indicator strains appeared after 6-8 h of incubation and in most cases decreased with further incubation, up to absence after 24 h. The difference in the antagonistic activity of 16-h-old and 24-h-old hours LAB cultures also was found. Among LAB tested, 241 strains are the most promising for further practical use, they have antagonistic action towards 10 indicator strains. The cross-streaking method can be used for rapid screening of bacteriocinogenic LAB strains and has advantages over the well-diffusion assay. To the best of our knowledge, this is the first report on a comparative characteristic of spectra of antagonistic activity against opportunistic pathogens of LAB strains belonging to different genera.
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Affiliation(s)
- I L Garmasheva
- Department of Physiology of Industrial Microorganisms, Zabolotny Institute of Microbiology and Virology National Academy of Science of Ukraine, Kyiv, Ukraine
| | - L T Oleschenko
- Department of Physiology of Industrial Microorganisms, Zabolotny Institute of Microbiology and Virology National Academy of Science of Ukraine, Kyiv, Ukraine
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Kumar S, Bansal K, Sethi SK. Comparative genomics analysis of genus Leuconostoc resolves its taxonomy and elucidates its biotechnological importance. Food Microbiol 2022; 106:104039. [DOI: 10.1016/j.fm.2022.104039] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 04/04/2022] [Accepted: 04/12/2022] [Indexed: 11/27/2022]
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