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Relevant bibliographies by topics / Leuconostoc dextranicum

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Academic literature on the topic 'Leuconostoc dextranicum'

Author: Grafiati

Published: 13 December 2022

Last updated: 27 January 2023

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Journal articles on the topic "Leuconostoc dextranicum"

1

Biruk, A. M., N. N. Furik, Yu S. Tarashkevich, and T. A. Savelyeva. "Construction of specific primers for identification of Leuconostoc mesenteroides subspecies." Proceedings of the National Academy of Sciences of Belarus. Agrarian Series 58, no. 2 (May 12, 2020): 244–56. http://dx.doi.org/10.29235/1817-7204-2020-58-2-244-256.

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Bacteria p. Leuconostoc is a technologically important group of lactic acid bacteria that is part of starter cultures for production of various dairy products. Two species are most important in the dairy industry: Leuconostoc lactis and Leuconostoc mesenteroides, which includes three subspecies: dextranicum, mesenteroides and cremoris. The main problem of identifying representatives of the p. Leuconostoc that these microorganisms can often be misidentified as enterococci or lactobacilli. In comparison with traditional methods of species detection, the establishment of species identity using PCR is characterized by universality, a deeper level of species differentiation, high reproducibility and reliability. The article presents the results of designing specific primers for Leuconostoc mesenteroides ssp. mesenteroides and Leuconostoc mesenteroides ssp. dextranicum. The specificity of developed primers was confirmed by in silico testing using available Leuconostoc mesenteroides genomic sequences, and experimentally using DNA samples of Leuconostoc mesenteroides clear cultures. The taxonomic affiliation of 5 isolates of leuconostocci isolated from natural samples was established using the developed primers. Methodological Instructions have been developed that regulate the procedure for determining the taxonomic position of bacteria of genus Leuconostoc to a subspecies. Methodological guidelines for identification of leuconostocs will be used in collections of industrial microorganisms for the accurate identification of deposited strains.

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2

Nour, Mohamed. "Studies on the large subunit rRNA genes and their flanking regions of leuconostocs." Canadian Journal of Microbiology 44, no. 9 (September 1, 1998): 807–18. http://dx.doi.org/10.1139/w98-072.

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The 16S-23S (spacer-1) and 23S-5S (spacer-2) rRNA intergenic spacer regions of Leuconostoc lactis, Leuconostoc mesenteroides, Leuconostoc mesenteroides subsp. dextranicum, and Leuconostoc mesenteroides subsp. cremoris were amplified by polymerase chain reactions and sequenced. The 23S rRNA genes of Leuconostoc lactis, Leuconostoc mesenteroides, and Leuconostoc mesenteroides subsp. dextranicum were also sequenced. The RNase III-like and RNase E processing sites, as well as putative antitermination signals, were identified within the spacer regions. A single tRNAAla gene without the 3'-terminal CCA sequence was found in spacer-1 regions. Secondary structure models are proposed showing interactions between the two spacer regions of leuconostocs. For all strains studied, spacer-1 and spacer-2 were highly conserved and therefore could not be directly used for strain typing. Sequence information on 23S rRNA genes from Leuconostoc species allowed the determination of regions that can be used as targets for diagnostic probes and amplification primers. Secondary structures of variable helical elements of leuconostocs 23S rRNA were constructed and their primary structures were compared with those of several Gram-positive bacteria with low G+C contents. Comparative analysis revealed that restriction analysis of 23S rRNA variable regions appeared to be sufficient for the search for species-specific signatures. Our experimental observations revealed that one form of the rRNA operons was present in leuconostocs. We have also demonstrated the direct linkage between the three species of rRNA genes, which are organized as follows: 5'-16S rRNA - spacer-1 - tRNAAla - 23S rRNA - spacer-2 - 5S rRNA-3'.Key words: leuconostocs, rrn operons, rDNA, 23S, spacer regions, polymerase chain reaction.

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3

Dimic, Gordana. "Characteristics of the Leuconostoc mesenteroides subsp. mesenteroides strains from fresh vegetables." Acta Periodica Technologica, no. 37 (2006): 3–11. http://dx.doi.org/10.2298/apt0637003d.

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Strains synthesizing extracellular polysaccharide dextran on a medium with 10% sucrose were isolated from different kind of vegetables (cabbage, cucumber, cauliflower, kohlrabi, carrot, green beans, red beet, pepper, eggplant, radish). Carbohydrate fermentation was examined using a bioMerieux API 50 CHL test system. Among micropopulations with characteristic spherical cell morphology, 94.9% belonged to Leuconostoc mesenteroides subsp. mesenteroides and 5.1% were identified as Leuconostoc mesenteroides subsp. dextranicum. According to fermentation of pentoses L. mesenteroides strains were divided into three groups with a certain number of biotypes; 10 strains were tested on acid production. .

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4

Ho-mu, Lin, Yang Zhiying, and Fu Chen Li. "Inactivation of Leuconostoc dextranicum with carbon dioxide under pressure." Chemical Engineering Journal 52, no. 1 (August 1993): B29—B34. http://dx.doi.org/10.1016/0300-9467(93)80047-r.

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Chen, Yi-sheng, Li-ting Wang, Yen-Chi Wu, Koji Mori, Tomohiko Tamura, Chi-huan Chang, Yu-chung Chang, Hui-chung Wu, Hsin-hui Yi, and Pin-yun Wang. "Leuconostoc litchii sp. nov., a novel lactic acid bacterium isolated from lychee." International Journal of Systematic and Evolutionary Microbiology 70, no. 3 (March 1, 2020): 1585–90. http://dx.doi.org/10.1099/ijsem.0.003938.

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A novel lactic acid bacterium, strain MB7T, was isolated from lychee in Taiwan. MB7T is Gram-staining-positive, catalase-negative, non-motile, non-haemolytic, facultatively anaerobic, coccoid-shaped, heterofermentative and mainly produces d-lactic acid from glucose. Comparative analysis of 16S rRNA, pheS and rpoA gene sequences has demonstrated that the novel strain represented a member of the genus Leuconostoc . 16S rRNA gene sequencing results indicated that MB7T had the same sequence similarity of 99.25 % to four type strains of members of the genus Leuconostoc : Leuconostoc mesenteroides subsp. dextranicum DSM 20484T, Leuconostoc mesenteroides subsp. jonggajibkimchii DRC 1506T, Leuconostoc mesenteroides subsp. mesenteroides ATCC 8293T and Leuconostoc suionicum DSM 20241T. Additionally, high 16S rRNA sequence similarities were also observed with Leuconostoc mesenteroides subsp. cremoris ATCC 19254T (99.12 %) and Leuconostoc pseudomesenteroides NRIC 1777T (98.69 %). When comparing the genomes of these type strains, the average nucleotide identity values and digital DNA–DNA hybridization values of MB7T with these type strains were 76.57–80.53 and 22.0–22.6 %, respectively. MB7T also showed different phenotypic characteristics to other most closely related species of the genus Leuconostoc , such as carbohydrate metabolizing ability, halotolerance and growth at various pHs. On the basis of phenotypic and genotypic properties, strain MB7T represents a novel species belonging to the genus Leuconostoc , for which the name Leuconostoc litchii sp. nov. is proposed. The type strain is MB7T (=BCRC 81077T=NBRC 113542T).

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Strausbaugh, Carl A., and Anne M. Gillen. "Bacteria and Yeast Associated with Sugar Beet Root Rot at Harvest in the Intermountain West." Plant Disease 92, no. 3 (March 2008): 357–63. http://dx.doi.org/10.1094/pdis-92-3-0357.

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An undescribed wet rot of roots was observed in surveys of recently harvested sugar beet roots in Idaho and eastern Oregon in 2004 and 2005. Microorganisms isolated from 287 roots fell into the following groups: A (41% of strains), B (29%), C (17%), D (11%), E (2%), and F (1%). Groups A, B, C, and F were composed of bacteria while groups D and E were yeasts. Subgroup A1 (80% of group A strains) included Leuconostoc mesenteroides subsp. dextranicum strains and subgroup A2 (20%) contained Lactobacillus strains. Group B was dominated by subgroup B1 (92% of strains), which included Gluconobacter strains. When only one organism was isolated from rotted roots, strains from subgroup A1 were isolated most frequently. Group C was composed of enteric bacteria. Strain B322 of L. mesenteroides subsp. dextranicum caused the most severe rot on root slices and produced symptoms similar to those in harvested roots. Results suggest that L. mesenteroides subsp. dextranicum is among the first bacterial species to enter sugar beet roots, closely following fungal infections or entering directly through openings such as growth cracks. The bacterial rot leads to yield loss in the field but likely also leads to storage and factory-processing problems.

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Bellengier, Pascale, D. Hemme, and Catherine Foucaud. "Citrate metabolism in 16 Leuconostoc mesenteroides subsp. mesenteroides and subsp. dextranicum strains." Journal of Applied Bacteriology 77, no. 1 (July 1994): 54–60. http://dx.doi.org/10.1111/j.1365-2672.1994.tb03044.x.

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BELLENGIER, PASCALE, JEAN RICHARD, and CATHERINE FOUCAUD. "Nutritional requirements of Leuconostoc mesenteroides subsp. mesenteroides and subsp. dextranicum for growth in milk." Journal of Dairy Research 64, no. 1 (February 1997): 95–103. http://dx.doi.org/10.1017/s0022029996001902.

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Growth of Leuconostoc mesenteroides in milk was studied with respect to the proteinase and peptidase activities of the strains and their nutritional requirements. Ln. mesenteroides grew poorly in milk since none of the 14 strains studied exceeded 5×108 cfu/ml at the end of growth. Few strains displayed proteinase activity, and this did not contribute much to growth. The pattern of peptidase activities varied with the strain. Nitrogen starvation and a high requirement for Mn2+ were involved in the cause of growth deficiencies. Addition of amino acids, 50 mg Mg2+/l and 0·08–0·49 mg Mn2+/l stimulated growth of most leuconostoc strains up to 5×108 cfu/ml. Addition of 5 g glucose/l to milk containing amino acids, Mg2+ and Mn2+ or yeast extract stimulated the growth of seven and eight strains respectively up to 109 cfu/ml. No growth advantage was found in a N2 atmosphere. However, the addition of small amounts of Mn2+ to milk suppressed the inhibitory effect of aeration on the growth of Ln. mesenteroides UD23, suggesting a protective role of Mn2+ against O2 toxicity.

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Mateo, Eva María, Andrea Tarazona, Misericordia Jiménez, and Fernando Mateo. "Lactic Acid Bacteria as Potential Agents for Biocontrol of Aflatoxigenic and Ochratoxigenic Fungi." Toxins 14, no. 11 (November 19, 2022): 807. http://dx.doi.org/10.3390/toxins14110807.

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Aflatoxins (AF) and ochratoxin A (OTA) are fungal metabolites that have carcinogenic, teratogenic, embryotoxic, genotoxic, neurotoxic, and immunosuppressive effects in humans and animals. The increased consumption of plant-based foods and environmental conditions associated with climate change have intensified the risk of mycotoxin intoxication. This study aimed to investigate the abilities of eleven selected LAB strains to reduce/inhibit the growth of Aspergillus flavus, Aspergillus parasiticus, Aspergillus carbonarius, Aspergillus niger, Aspergillus welwitschiae, Aspergillus steynii, Aspergillus westerdijkiae, and Penicillium verrucosum and AF and OTA production under different temperature regiments. Data were treated by ANOVA, and machine learning (ML) models able to predict the growth inhibition percentage were built, and their performance was compared. All factors LAB strain, fungal species, and temperature significantly affected fungal growth and mycotoxin production. The fungal growth inhibition range was 0–100%. Overall, the most sensitive fungi to LAB treatments were P. verrucosum and A. steynii, while the least sensitive were A. niger and A. welwitschiae. The LAB strains with the highest antifungal activity were Pediococcus pentosaceus (strains S11sMM and M9MM5b). The reduction range for AF was 19.0% (aflatoxin B1)-60.8% (aflatoxin B2) and for OTA, 7.3–100%, depending on the bacterial and fungal strains and temperatures. The LAB strains with the highest anti-AF activity were the three strains of P. pentosaceus and Leuconostoc mesenteroides ssp. dextranicum (T2MM3), and those with the highest anti-OTA activity were Leuconostoc paracasei ssp. paracasei (3T3R1) and L. mesenteroides ssp. dextranicum (T2MM3). The best ML methods in predicting fungal growth inhibition were multilayer perceptron neural networks, followed by random forest. Due to anti-fungal and anti-mycotoxin capacity, the LABs strains used in this study could be good candidates as biocontrol agents against aflatoxigenic and ochratoxigenic fungi and AFL and OTA accumulation.

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Tsai, H. J., and W. E. Sandine. "Conjugal transfer of nisin plasmid genes from Streptococcus lactis 7962 to Leuconostoc dextranicum 181." Applied and Environmental Microbiology 53, no. 2 (1987): 352–57. http://dx.doi.org/10.1128/aem.53.2.352-357.1987.

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Dissertations / Theses on the topic "Leuconostoc dextranicum"

1

Bellengier, Pascale. "Sélection de souches de Leuconostoc mesenteroides subsp. Mesenteroides et dextranicum pour leurs aptitudes en technologie fromagère et étude de leur croissance dans le lait." Compiègne, 1995. http://www.theses.fr/1995COMPD807.

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Sun, Yu Ping, and 孫豫蘋. "Studies on the characteristics and the effect of medium ingredients on the production bascteriocins form pediococcus dammosus ACCEL, FS211 and leuconostoc dextranicum L1/6." Thesis, 1994. http://ndltd.ncl.edu.tw/handle/41311315763732690447.

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盧巧玲. "The Characteristics and the Effect of Temperature、pH and Composition of Medium on the Production of Bacteriocins from Pediococcus damnosus ACCEL and Leuconostoc dextranicum L1/6." Thesis, 1995. http://ndltd.ncl.edu.tw/handle/92226710694793519570.

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碩士
國立海洋大學
水產食品科學研究所
83
We have studied on the characteristics and the effect of temperature, pH and composition of medium on the production of bacteriocin from Pediococcus damnosus ACCEL and Leuconostoc dextranicum L1/6. To find the best cultivated condition of bacteriocins, were able to be applied in fermented foods in future. The plasmids profile in P. amnosus ACCEL were 30.2 and 26.2 MDa, and in L. dextranicum L1/6 were 27.8 and 26.2 MDa. When P. admnosus ACCEL didn''t contain 30.2 MDa plasmid it could be lossing activity. P. damnosus ACCELand L. dextranicum L1/6 could produce the bacteriocins at temperature 15~45℃ and 4~40℃.. Maximum bacteriocin activity was detected after the the stationary phase of growth. P. damnosus ACCEL and L. dexlranicum L1/6 produces more than two bacteriocins, which molecular mass were between. 1 and 10 KDa, and more than 30KDa. Bacteriocin ACCEL were sensitive to proteolytic enzymes and α-amylase, resistant to heat, and active over a wide range of pH. Bacteriocin L1/6 were sensitivity to proteolytic enzymes and α-amylase, resistant to heat, but not stable in a wide range of pH. They were antibacterial against Listeria monocytogenes. The influence of medium formula on production of bacteriocin ACCEL and L1/6 were studied.

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Book chapters on the topic "Leuconostoc dextranicum"

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Tu, Nguyen Hoang Khue, and Tran Chu Minh Hoang. "Detection of Cholesterol Esterase in Leuconostoc Dextranicum Isolated in Foods." In IFMBE Proceedings, 205–7. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-32183-2_53.

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Conference papers on the topic "Leuconostoc dextranicum"

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Kadhim, Afraa Ali, Jehan Abdul Sattar Salman, Adawiya J. Haider, Sumayah Abdulhussien Ibraheem, and Haitham ali Kadhim. "Effect of Zinc Oxide Nanoparticles Biosynthesized by Leuconostoc Mesenteroides ssp. Dextranicum Against Bacterial Skin Infections." In 2019 12th International Conference on Developments in eSystems Engineering (DeSE). IEEE, 2019. http://dx.doi.org/10.1109/dese.2019.00141.

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