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| Registros recuperados: 17 | |
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| Mota,Monalize Salete; Gomes,Cesar Bauer; Souza Júnior,Ismail Teodoro; Moura,Andréa Bittencourt. |
| Abstract This study aimed to evaluate the biocontrol potential of bacteria isolated from different plant species and soils. The production of compounds related to phytopathogen biocontrol and/or promotion of plant growth in bacterial isolates was evaluated by measuring the production of antimicrobial compounds (ammonia and antibiosis) and hydrolytic enzymes (amylases, lipases, proteases, and chitinases) and phosphate solubilization. Of the 1219 bacterial isolates, 92% produced one or more of the eight compounds evaluated, but only 1% of the isolates produced all the compounds. Proteolytic activity was most frequently observed among the bacterial isolates. Among the compounds which often determine the success of biocontrol, 43% produced compounds which... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhizobacteria; Antibiosis; Mesocriconema xenoplax; Obligate parasites; Perennial plants. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000100062 |
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| Montalvão,Sandro Coelho Linhares; Castro,Marcelo Tavares de; Soares,Carlos Marcelo Silveira; Blum,Luiz Eduardo Bassay; Monnerat,Rose Gomes. |
| ABSTRACT: The cotton plant (Gossypium hirsutum) is affected by several diseases of economic importance, among them root-knot nematode (Meloidogyne incognita races 3 and 4). Methods to control this disease include the application of nematicides, solarization, deep plowing, crop rotation and use of antagonistic microorganisms. Among species of Bacillus, there are strains that act as bioregulators and antagonists of several pathogens. Tests to identify these strains are hampered by the difficulty of obtaining large populations of the pathogen and by the time of execution of the in vivo tests that should be conducted for about 90 days. The objective of this research was to compare the toxicity of B. thuringiensis strains to two nematodes, M. incognita and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biocontrol; Phytonematode; Root-knot nematode; Rhizobacteria. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000700151 |
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| Bumunang,Emmanuel Wihkochombom; Babalola,Olubukola Oluranti. |
| This study was done to examine the rhizobacteria from field grown Genetically Modified (GM) maize and its non-GM counterpart. Rhizospheric soil samples were collected at 30 days after sowing (DAS) and at post-harvest from two experimental fields in Gauteng, South Africa. Total rhizobacteria (cfu/g) in GM and non-GM soil samples was not significantly different across the different media 30 DAS and at post-harvest. Rhizobacterial isolates obtained were biochemically characterized using the analytical profile index. Species of Pseudomonas, Aeromonas, Sphingomonas, Burkholderia, Stenotrophomonas, Achromobacter, Ewingella and Bacillus were screened in vitro for plant growth promoting traits such as, ammonia production, catalase activity, indole acetic acid... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Genetically modified maize; Plant growth promoting traits; Rhizosphere; Rhizobacteria. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000100001 |
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| Naoe,Alessandra M. de L.; Peluzio,Joênes M.; Campos,Leonardo J. M.; Naoe,Lucas K.; Silva,Roberta A. e. |
| ABSTRACT This study aimed to verify the effect of co-inoculation, association between Azospirillum brasilense and Bradyrhizobium japonicum bacteria, on soybean plants subjected to water deficit at two sowing dates. Two field experiments were conducted at the Universidade Federal de Tocantins, campus of Palmas, Brazil, in 2016. The experimental design was randomized blocks in a split-split-plot arrangement with four repetitions, where the plots consisted of two irrigation depths (100 and 25% of crop evapotranspiration - ETc), the subplots was composed of two methods of inoculant application (inoculation with Bradyrhizobium japonicum and co-inoculation with Azospirillum brasilense + Bradyrhizobium japonicum) and the sub-subplots comprised two soybean... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max (L.) Merrill; Rhizobacteria; Water stress; Irrigation. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200089 |
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| Turatto,Marcielly F.; Dourado,Fernanda dos S.; Zilli,Jerri E.; Botelho,Glória R.. |
| ABSTRACT Plant Growth Promoting Rhizobacteria (PGPR) have different mechanisms of action in the development of plants, such as growth promotion, production of phytohormones and antibiotic substances and changes in root exudates. These help to control plant diseases. In order to evaluate the potential of microorganisms in the control of Meloidogyne javanica and Ditylenchus spp., five rhizobacteria isolated from rhizosphere of garlic cultivated in the Curitibanos (SC) region were tested. Hatching chambers were set on Petri dishes, in which were added 10 mL of bacterial suspension and 1 mL of M. javanica eggs suspension, at the rate of 4500, on the filter paper of each chamber. The same procedure was performed with 300 juvenile Ditylenchus spp. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium sativum L.; Glycine max (L.) Merril; Biocontrol; Plant parasitic nematodes; Rhizobacteria. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100054 |
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| Medeiros,Jeane E de; Mariano,Rosa de LR; Pedrosa,Elvira MR; Silveira,Elineide B da. |
| We obtained 61 rhizobacterium isolates from rhizosphere soil samples collected in melon commercial fields located in Mossoró, Rio Grande do Norte State, Brazil. These isolates, along with 56 endophytic bacteria from the Collection of Cultures of the Plant Bacteriology Laboratory of the Universidade Federal Rural de Pernambuco, were tested for controlling Meloidogyne incognita race 2 in melon. To infest the soil with nematodes, 1000 eggs of Meloidogyne incognita race 2 per plant were placed in pots where seedlings of the yellow-type melon, cultivar AF 682, were growing for 10 days. Two days before, 20 mL of bacterial suspension (0.7 OD570nm) were poured into each pot. After 60 days, fresh root biomass, gall index, egg mass, and the nematode reproduction... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Meloidogyne; Cucumis melo; Rhizobacteria; Endophytic bacteria; Management. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362009000300010 |
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| Martins, Samuel Julio; Medeiros, Flavio Henrique Vasconcelos; Souza, Ricardo Magela; Vilela, Laize Aparecida Ferreira. |
| Abiotic stress interferes with plant-microbial interactions, but some microorganisms may buffer this interference. We investigated the interaction between temperature and bacterial wilt (Curtobacterium flaccumfaciens pv. flaccumfaciens - Cff) biocontrol and the ability of Bacillus subtilis strain ALB629 to colonize bean seedlings, to inhibit pathogen growth and to use different C and N sources. B. subtilis ALB629rif, a mutant selected from the wild population of ALB629, was used to monitor plant colonization at 20°C and 30°C. ALB629rif was detected only in the plant roots (103.22 CFU g-1) at the lower temperature but colonized the roots, stems, and leaves (105.85, 104.48, and 104.01 CFU g-1), respectively, at 30ºC. The area under the disease progress curve... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 5.01.02.01-0 seed treatment; Phaseolus vulgaris; Antibiosis; Temperature; Rhizobacteria; PGPR Fitopatologia. |
| Ano: 2014 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/18018 |
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| Carvalho,Daniel D.C.; Oliveira,Denilson F.; Corrêa,Rogério S. B.; Campos,Vicente P.; Guimarães,Renato M.; Coimbra,João L.. |
| To contribute for the development of environmental friendly methods for weed control, a selection of rhizobacteria able to produce phytotoxic substances was carried out. Initially, 35 strains previously isolated from plants in the south of Minas Gerais State (Brazil) were grown in tryptic soy broth. After removal of bacterial cells, the resulting liquids were freeze-dried and extracted with methanol/ethyl acetate (1:1). The extracts were concentrated under vacuum and dissolved in water to be submitted to a lettuce (Lactuca sativa L.) seed assay. Metabolites produced by five strains reduced the number of normal seedlings to values statistically bellow the one observed for the negative control, being the most expressive results obtained with Bacillus cereus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacillus cereus; Bioherbicide; Lactuca sativa; Phytotoxin; Rhizobacteria; Brachiaria decumbens. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000400032 |
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| Registros recuperados: 17 | |
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