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| Registros recuperados: 40 | |
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| CESA-LUNA,Catherine; BAEZ,Antonino; QUINTERO-HERNÁNDEZ,Verónica; CRUZ-ENRÍQUEZ,Joel DE LA; CASTAÑEDA-ANTONIO,Ma Dolores; MUÑOZ-ROJAS,Jesús. |
| ABSTRACT Bacteria produce antimicrobial compounds to compete for nutrients and space in a particular habitat. Antagonistic interactions can be evaluated by several methodologies including the double-layer agar and simultaneous inhibition assays. Among the well-known inhibitory substances produced by bacteria are the broad-spectrum antibiotics, organic acids, siderophores, antifungal, and bacteriocins. The most studied bacterial genera able to produce these inhibitory substances are Enterococcus, Lactococcus, Streptomyces, Bacillus, Pseudomonas, Klebsiella, Escherichia, and Burkholderia. Some beneficial bacteria can promote plant growth and degrade toxic compounds in the environment representing an attractive solution to diverse issues in agriculture and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antagonism; Antibiotic; Competition; Inhibition; PGPR. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000100140 |
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| SANTOS,Andrés; NÚÑEZ-MONTERO,Kattia; LAMILLA,Claudio; PAVEZ,Mónica; QUEZADA-SOLÍS,Damián; BARRIENTOS,Leticia. |
| ABSTRACT The extreme weather conditions in the Antarctic have exerted selective pressures favoring differential features in bacteria to survive this untapped environment (i.e., antibiotic molecules). Notably, higher chances of antibiotic discovery from extremophiles have been proposed recently. Although new organic and environmentally friendly sources for helping in the control of plant pathogenic fungi are necessary, the information about anti-phytopathogenic applications of extremophile microorganisms from untapped environments is limited. In this study, we determined the antifungal effect of actinobacterial strains isolated from Antarctic soils and sediments. Co-culture inhibition assays and Minimum Inhibitory Concentration (MIC) determination revealed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antagonism; Antarctic bacteria; Antifungal; Extremophile; Plant pathogen. |
| Ano: 2020 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-548X2020000200353 |
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| Silva,J.G.; Castro,R.D.; Sant’Anna,F.M.; Barquete,R.M.; Oliveira,L.G.; Acurcio,L.B.; Luiz,L.M.P.; Sales,G.A.; Nicoli,J.R.; Souza,M.R.. |
| ABSTRACT Minas artisanal cheese is made from endogenous starter cultures, including lactic acid bacteria (LAB). Some LAB may possess probiotic potential. Thus, this study aimed to evaluate the in vitro probiotic properties of lactobacilli isolated from Minas artisanal cheeses produced in Minas Gerais. Ten samples of lactobacilli, formerly isolated from those cheeses, were submitted to the following assays: antimicrobial susceptibility, tolerance to artificial gastric juice and biliary salts, production of hydrogen peroxide and antagonism against pathogenic and non-pathogenic micro-organisms. Only L. plantarum (C0) was sensitive to all tested antimicrobials, while the other LAB samples were resistant to at least one drug. Six samples were tolerant to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Artisanal cheeses; Beneficial micro-organisms; Antibiogram; Tolerance to gastric juice and biliary salts; Antagonism. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000200647 |
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| Santos,João Paulo Victorino; Araújo,Tatiane Ferreira; Ferreira,Célia Lúcia de Luces Fortes; Goulart,Simone Machado. |
| In this study, the potential of kefir grains, obtained from three different towns/cities in the Southeast Region of Brazil to inhibit the growth of the five pathogenic microorganisms was evaluated. The samples showed the growth inhibition from 42.80-69.15 for Staphylococcus aureus ATCC 6538, 30.73-59.89 for Escherichia coli ATCC 11229, 44.99-73.05 for Salmonela typhi ATCC 6539, 41.45-54.18 for Listeria monocytogenes ATCC 15313 and 70.38-86.80 for Bacillus cereus RIBO 1222-173-S4. These results indicated that the kefir grains evaluated had antagonistic activity toward the different pathogens tested. The ability to inhibit, although differently depending on the regional microbiota, indicated a potential for their use as a functional food. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kefir; Antagonism; Inhibitors; Functional foods. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000500014 |
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| Branco,K.M.G.R.; Nardi,R.M.D.; Moreira,J.L.S.; Nunes,A.C.; Farias,L.M.; Nicoli,J.R.; Carvalho,M.A.R.. |
| Lactobacilli isolated from the vaginal tract of women with and without bacterial vaginosis (BV) were identified and characterized for the production of antagonists. Bacterial samples were isolated from healthy women (N = 16), from patients with clinical complaints but without BV (N = 30), and from patients with BV (N = 32). Identification was performed using amplified ribosomal DNA restriction analysis. Production of antagonistic compounds was evaluated by the double-layer diffusion technique using Gram-positive (N = 9) and Gram-negative bacteria (N = 6) as well as yeast (N = 5) as indicator strains. Of a total of 147 isolates, 133 were identified as pertaining to the genus Lactobacillus. Lactobacillus crispatus was the species most frequently recovered,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactobacillus; Bacterial vaginosis; Antagonism; Hydrogen peroxide; Identification. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000400003 |
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| Mendoza,José Luis Hernández; Pérez,María Isabel Sánchez; Prieto,Juan Manuel González; Velásquez,Jesús DiCarlo Quiroz; Olivares,Jesús Gerardo García; Langarica,Homar Rene Gill. |
| Abstract Sampling of agricultural soils from the Mexican northeastern region was performed to detect Trichoderma spp., genetically characterize it, and assess its potential use as a biologic control agent against Macrophomina phaseolina. M. phaseolina is a phytopathogen that attacks over 500 species of cultivated plants and causes heavy losses in the regional sorghum crop. Sampling was performed immediately after sorghum or corn harvest in an area that was approximately 170 km from the Mexico-USA border. Sixteen isolates were obtained in total. Using colony morphology and sequencing the internal transcribed spacers (ITS) 1 and 4 of 18S rDNA, 14 strains were identified as Trichoderma harzianum, T. koningiopsis and T. virens. Subsequently, their antagonistic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Macrophomina phaseolina; Antagonism; Hyperparasitism; Trichoderma. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000401093 |
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| Orlandelli,Ravely Casarotti; Almeida,Tiago Tognolli de; Alberto,Raiani Nascimento; Polonio,Julio Cesar; Azevedo,João Lúcio; Pamphile,João Alencar. |
| Endophytes are being considered for use in biological control, and the enzymes they secrete might facilitate their initial colonization of internal plant tissues and direct interactions with microbial pathogens. Microbial proteases are also biotechnologically important products employed in bioremediation processes, cosmetics, and the pharmaceutical, photographic and food industries. In the present study, we evaluated antagonism and competitive interactions between 98 fungal endophytes and Alternaria alternata, Colletotrichum sp., Phyllosticta citricarpa and Moniliophthora perniciosa. We also examined the proteolytic activities of endophytes grown in liquid medium and conducted cup plate assays. The results showed that certain strains in the assemblage of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antagonism; Competitive interaction; Dual culture; Cup plate; Protease. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000200359 |
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| Crispim,S.M.; Nascimento,A.M.A.; Costa,P.S.; Moreira,J.L.S.; Nunes,A.C.; Nicoli,J.R.; Lima,F.L.; Mota,V.T.; Nardi,R.M.D.. |
| Puba or carimã is a Brazilian staple food obtained by spontaneous submerged fermentation of cassava roots. A total of 116 lactobacilli and three cocci isolates from 20 commercial puba samples were recovered on de Man, Rogosa and Sharpe agar (MRS); they were characterized for their antagonistic activity against foodborne pathogens and identified taxonomically by classical and molecular methods. In all samples, lactic acid bacteria were recovered as the dominant microbiota (7.86 ± 0.41 log10 CFU/g). 16S-23S rRNA ARDRA pattern assigned 116 isolates to the Lactobacillus genus, represented by the species Lactobacillus fermentum (59 isolates), Lactobacillus delbrueckii (18 isolates), Lactobacillus casei (9 isolates), Lactobacillus reuteri (6 isolates),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Puba; Carimã; Fermented food; Lactobacillus spp.; Cassava; Antagonism. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000100002 |
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| Dalzotto,Laís; Tortelli,Brenda; Stefanski,Francine Spitza; Sacon,Deivid; Silva,Vanessa Neumann; Milanesi,Paola Mendes. |
| ABSTRACT: In the search for improved yields, seed treatment by microbiolization has been used as an alternative to chemical treatment. The objective was to verify the physiological and sanitary quality of creole bean seeds, var. Chumbinho, after microbiolization with doses of a commercial product (c.p.) with Trichoderma harzianum (strain ESALQ-1306). The treatments were: T1) 100 mL c.p./100 kg seeds; T2) 150 mL c.p.; T3) 200 mL c.p.; T4) 200 mL of chemical treatment (c.p., 250 g L-1 fipronil + 25 g L-1 pyraclostrobin + 225 g L-1 thiophanate-methyl); and T5) control (without coating of seeds). The tests were: sanitary test (blotter test); germination and first count; accelerated aging, cold germination without soil, speed of germination rate (SGR), seedling... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antagonism; Biological control; Phaseolus vulgaris L.; Vigor.. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000500151 |
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| Tlapal Bolaños, Bertha. |
| La marchitez es uno de los problemas fitosanitario más importantes en el agave tequilero Agave tequilana Weber var. Azul, enfermedad que esta asociada con varios microorganismos y que principalmente se presenta en plantaciones de más de 2 años de edad. Entre los posibles agentes causales de esta enfermedad se reportan a varias especies de Fusarium spp., así como a Thielaviopsis paradoxa. En el presente trabajo se planteó el de inocular con organismos benéficos plantas de agave tequilero que se usan como material propagativo en vivero para nuevas plantaciones, como parte de un manejo preventivo e integrado del cultivo. En este trabajo se estudió en vivero (Rancho El Indio, Tequila, Jalisco) y en campo, en plantaciones comerciales de agave en las... |
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Palavras-chave: Marchitez del agave; Fusarium spp.; Antagonismo; Supresividad; Agave wilt; Antagonism; Suppressive; Fitopatología; Doctorado. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2117 |
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| Lima,Alita Moura de; Salem,Júlia Ignez; Souza,João Vicente Braga de; Cortez,Ana Claudia Alves; Carvalho,Clarice Maia; Chaves,Francisco Célio Maia; Veiga Junior,Valdir Florêncio da. |
| Substances that inhibit the growth of Mycobacterium tuberculosis could potentially be used as antibiotics. These substances could also be added to test culture media to improve the speed of tuberculosis diagnosis. The aim of this work was to investigate the influence of culture filtrates of endophytic fungi isolated from P. aduncum L. on the growth of M. tuberculosis. To achieve this objective, the following methodology was used: a) endophytic fungi were isolated from the leaves and stems of P. aduncum L.; b) the isolated fungi were submitted to submerged bioprocessing; c) culture filtrates from the bioprocess were assayed to evaluate their effect on the growth of M. tuberculosis. We isolated 315 fungal types, which represented 85 morphologies, from... |
| Tipo: Journal article |
Palavras-chave: Antagonism; Stimulation growth; Tuberculosis. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582011000400008 |
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| Registros recuperados: 40 | |
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