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| Registros recuperados: 31 | |
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| Soares,Bruno Lima; Ferreira,Paulo Ademar Avelar; Rufini,Márcia; Martins,Fábio Aurélio Dias; Oliveira,Dâmiany Pádua; Reis,Ricardo Pereira; Andrade,Messias José Bastos de; Moreira,Fatima Maria de Souza. |
| ABSTRACT Management of biological nitrogen fixation in common bean still requires improvement. The objective of this study was to verify the compatibility of nitrogen fertilization with biological N2 fixation to increase common bean yield and profitability. Four field experiments were performed in four municipalities of Minas Gerais, Brazil, during the 2009 and 2010 winter crop season. The 2009 crop experiments were set up under a no-till system and the 2010 crop was conducted using conventional tillage. A randomized block experimental design was used with four replications and seven treatments combining application rates of mineral N (at sowing and/or topdressing) and seed inoculation with Rhizobium tropici strain CIAT899. Inoculation with 20 kg ha-1... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Nitrogen fixation; No-till; Conventional tillage. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100416 |
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| Teixeira,Anita Fernanda dos Santos; Kemmelmeier,Karl; Marascalchi,Matheus Nicoletti; Stürmer,Sidney Luiz; Carneiro,Marco Aurélio Carbone; Moreira,Fatima Maria de Souza. |
| ABSTRACT Arbuscular mycorrhizal fungi (AMF) interact symbiotically with most plant species, facilitating revegetation of areas under rehabilitation. The aim of this study was to evaluate the inoculum potential, density, and diversity of AMF spores in five environments, as well as the relation of species with soil properties. Soil samples were collected in five environments in a mining area and its surroundings in the Quadrilátero Ferrífero, Minas Gerais (Brazil): tailings piles in rehabilitation with grass, canga, Cerrado, native forest, and eucalyptus plantation; these samples were subjected to chemical and physical analyses. Spores were directly extracted from field samples and from trap cultures (TCs) established in two locations in the Southeast and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tailings piles; Glomeromycota; Ironstone; Rehabilitation.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000500511 |
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| Diniz,Patricia Fabian de Araújo; Oliveira,Luiz Edson Mota de; Lopes,Noelly Alves; Florentino,Ligiane Aparecida; Carvalho,Teotonio Soares de; Moreira,Fatima Maria de Souza. |
| Diversos relatos evidenciam os benefícios de procariotos fixadores de nitrogênio atmosférico no crescimento e na nutrição de muitas espécies vegetais; entretanto, não há, até o momento, nenhum trabalho visando à prospecção desses microrganismos na rizosfera da seringueira (Hevea brasiliensis). Assim, os objetivos deste trabalho foram verificar a ocorrência de bactérias diazotróficas em solos sob plantio de seringueira, assim como em suas raízes, e isolar e caracterizar essas bactérias. Para essa finalidade, coletaram-se amostras de solo e de raízes finas de seringueiras cultivadas no Campus Experimental da Universidade Federal de Lavras (Lavras, MG) para inoculação em meios de cultura semissólidos sem N na forma combinada, de modo a favorecer o crescimento... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hevea; Diazotróficos; Fixação biológica de nitrogênio; Beijerinckia. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000500006 |
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| Rufini,Márcia; Oliveira,Dâmiany Pádua; Trochmann,André; Soares,Bruno Lima; Andrade,Messias José Bastos de; Moreira,Fatima Maria de Souza. |
| ABSTRACT: Optimization of symbiosis between nitrogen-fixing bacteria and legumes has been extensively studied, seeking agricultural sustainability. To evaluate the symbiotic efficiency of nitrogen-fixing bacterial strains belonging to the Bradyrhizobium genus with pigeon pea (Cajanus cajan (L.) Millsp.) cv. Fava-Larga, experiments were conducted in Leonard jars (axenic conditions), pots with soil, and in the field. Ten strains were tested in Leonard jars, and three strains, in addition to BR 29, were selected according to their ability to promote the growth of pigeon pea, for further tests in pots with different soil types (Inceptsol and Oxisol) and in the field (Oxisol). Treatments were compared with strains BR 2003 and BR 2801 (approved as inoculants for... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cajanus cajan; Inoculant; Biological nitrogen fixation; Selection. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832016000100432 |
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| Araújo,Kaliane Sírio; Carvalho,Fernanda de; Moreira,Fatima Maria de Souza. |
| ABSTRACT The aim of this study was to evaluate the relationship and symbiotic efficiency of 14 strains of Burkholderia isolated from rupestrian grasslands, using M. atropurpureum and Mimosa tenuiflora as trap plants, with the species M. atropurpureum, Mimosa bimucronata and M. foliolosa. For the nodulation and symbiotic efficiency test in M. atropurpureum, long-neck bottles containing nutrient solution were used. The experiments with Mimosa spp. were carried out in tubes containing vermiculite (160 cm3) and sand (80 cm3) (2:1). The parameters under evaluation were number of nodules, nodules dry matter production, shoots dry matter, roots dry matter, and total dry matter production for all the species analyzed; and plant height, diameter, and the Dickson... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rupestrian grasslands; Nitrogen-fixing bacteria; Symbiosis; Mimosa bimucronata; Mimosa foliolosa. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000100041 |
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| Marques,Teresa Cristina Lara Lanza de Sá e Melo; Moreira,Fatima Maria de Souza; Siqueira,José Oswaldo. |
| O objetivo do trabalho foi avaliar o teor de metais pesados e o crescimento de mudas de 20 espécies arbóreas tropicais em solo com elevado grau de contaminação com metais pesados. Em casa de vegetação, as mudas foram transplantadas para vasos contendo 3,3 kg de misturas com diferentes proporções (0, 20, 40 e 60% v/v) de solo contaminado. Verificou-se comportamento diferenciado das espécies quanto à inibição de crescimento e aos teores de metais na raiz e na parte aérea em decorrência da contaminação. Com base na produção de matéria seca da parte aérea, concluiu-se que apenas Myrsine umbellata, Cedrella fissilis, Tabebuia impetiginosa e Copaifera langsdorffii não foram afetadas pela contaminação, enquanto Hymenaea courbaril, Mimosa caesalpiniaefolia, Acacia... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Poluição do solo; Árvores tropicais; Revegetação; Reabilitação do solo. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000100015 |
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| Ferreira,Paulo Ademar Avelar; Bomfeti,Cleide Aparecida; Soares,Cláudio Roberto Fonsêca de Souza; Soares,Bruno Lima; Moreira,Fatima Maria de Souza. |
| ABSTRACT: Among soil microorganisms, the genus Cupriavidus has garnered particular scientific, economic and ecological interest because of its ability to fix nitrogen and tolerate high concentrations of metals. The aim of this study was to analyze four strains of Cupriavidus necator for their ability to tolerate and bioaccumulate cadmium and zinc. The tolerance of these strains to these metals was assessed in liquid culture medium containing different concentrations of Zn + Cd and in soil solutions and soils contaminated with multiple elements including Zn, Cd, Cu and Pb. The four strains showed high tolerance to Zn and Cd, both in culture medium and when inoculated into contaminated soil solutions or multi-element contaminated soil. The UFLA02-71 strain... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Β-proteobacteria; Bioremediation; Heavy-metal; Soil pollution. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600452 |
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| Silva,Krisle da; Nóbrega,Rafaela Simão Abrahão; Lima,Adriana Silva; Barberi,Alexandre; Moreira,Fatima Maria de Souza. |
| Non-symbiotic diazotrophic bacteria are amongst the most important functional groups of soil-dwelling microorganisms. These bacteria contribute to plant growth predominantly through biological N2 fixation. Here, we evaluated the density and diversity of non-symbiotic diazotrophic bacteria in soils taken from diverse land use systems (LUS) in Amazonia using nitrogen-free media. A total of 30 soil samples were collected from the following LUS: pristine forest, young secondary forest, old secondary forest, agroforestry, agriculture and pasture. Bacterial density was evaluated by the most probable number (MPN) method utilizing N-free semi-solid media with varied compositions (JNFb, NFb, LGI and Fam). Individual isolates were characterized by colony and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Burkholderia sp.; Enterobacter sp.; Serratia sp.; Bacillus sp.; Klebsiella sp.. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500002 |
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| Castro,Jordana Luísa de; Souza,Mariana Gonçalves; Rufini,Márcia; Guimarães,Amanda Azarias; Rodrigues,Tainara Louzada; Moreira,Fatima Maria de Souza. |
| ABSTRACT Mining is an important economic activity. However, its impact on environment must be accessed, mainly on relevant processes for their sustainability. The objective of this study was to evaluate the diversity and efficiency of symbiotic nitrogen fixing bacterial communities in soils under different types of vegetation in the Quadrilátero Ferrífero: ironstone outcrops, Atlantic Forest, neotropical savanna, and a rehabilitated area revegetated with grass. Suspensions of soil samples collected under each type of vegetation were made in a saline solution to capture rhizobia communities that were then inoculated on cowpea [Vigna unguiculata (L.) Walp.], which was used as a trap plant. The symbiotic efficiency of the communities was evaluated in a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological indicators; Biological N2 fixation; Ironstone outcrops. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100421 |
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| Ferreira,Paulo Ademar Avelar; Bomfeti,Cleide Aparecida; Silva Júnior,Romildo da; Soares,Bruno Lima; Soares,Cláudio Roberto Fonseca Sousa; Moreira,Fatima Maria de Souza. |
| O objetivo deste trabalho foi avaliar a tolerância de estirpes de Cupriavidus necator a zinco, cádmio, cobre e chumbo, além de determinar a eficiência simbiótica das estirpes mais tolerantes em associação a espécies leguminosas com potencial para revegetação. A tolerância foi testada em meio LB, suplementado com 2,5; 5,0; 7,5; 10; 12,5 e 15 mmol L-1 de ZnSO4.7H2O, CdSO4.8H2O, CuSO4.5H2O e PbCl2, respectivamente, em comparação ao controle sem adição de metal. Determinou-se a eficiência simbiótica das quatro estirpes de C. necator mais tolerantes aos metais avaliados (UFLA02-71, UFLA02-73, UFLA01-659 e UFLA01-663), as quais foram inoculadas nas espécies: Leucaena leucocephala, Enterolobium contortisiliquum, Acacia mangium, Mimosa caesalpiniifolia, M. pudica,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Áreas degradadas; Β-proteobactéria; Fixação biológica de nitrogênio; Metais pesados; Revegetação. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000100012 |
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| Rufini,Márcia; Oliveira,Dâmiany de Pádua; Trochmann,André; Soares,Bruno Lima; Andrade,Messias José Bastos de; Moreira,Fatima Maria de Souza. |
| O objetivo deste trabalho foi avaliar a eficiência simbiótica de estirpes de bactérias fixadoras de nitrogênio do gênero Bradyrhizobium com guandu-anão. Os experimentos foram conduzidos em vasos de Leonard, em vasos com solo e em campo. Foram testadas 11 estirpes em vasos de Leonard, e as que apresentaram maior eficiência em promover o crescimento do guandu-anão foram avaliadas em vasos com solo (Latossolo Vermelho-Amarelo e Cambissolo) e em campo (Latossolo Vermelho-Amarelo). Em todos os experimentos, os tratamentos foram comparados a dois controles positivos (estirpes aprovadas como inoculantes para as cultivares de guandu-anão BR 2003 e BR 2801) e a duas testemunhas sem inoculação, uma com alta concentração de N mineral, e a outra, a depender do... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cajanus cajan; Fixação biológica de nitrogênio; Inoculante. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000300197 |
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| Bomfeti,Cleide Aparecida; Florentino,Ligiane Aparecida; Guimarães,Ana Paula; Cardoso,Patrícia Gomes; Guerreiro,Mário César; Moreira,Fatima Maria de Souza. |
| The process of biological nitrogen fixation (BNF), performed by symbiotic nitrogen fixing bacteria with legume species, commonly known as α and β rhizobia, provides high sustainability for the ecosystems. Its management as a biotechnology is well succeeded for improving crop yields. A remarkable example of this success is the inoculation of Brazilian soybeans with Bradyrhizobium strains. Rhizobia produce a wide diversity of chemical structures of exopolysaccharides (EPS). Although the role of EPS is relatively well studied in the process of BNF, their economic and environmental potential is not yet explored. These EPS are mostly species-specific heteropolysaccharides, which can vary according to the composition of sugars, their linkages in a single... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exopolysaccharides; Nodules; Environmental stress; Soil aggregation; Rhizobia. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000300001 |
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| Ferreira,Linnajara de Vasconcelos Martins; Carvalho,Fernanda de; Andrade,Júlia Fonseca Colombo; Moreira,Fatima Maria de Souza. |
| ABSTRACT: A significant number of bacterial species, particularly in the rhizosphere, may benefit plant growth and development. This group of bacteria is known as plant growth-promoting rhizobacteria (PGPR). This study identified genetically isolates of common bean nodules used to trap bacteria from Amazon pastureland and investigated their capacity of nodulating and promoting growth of common bean when inoculated or co-inoculated with CIAT899 strain (Rhizobium tropici). Two experiments were carried out in a greenhouse, in axenic conditions, using the common bean cultivar Talismã. In the first experiment, 56 PGPR strains were evaluated individually regarding growth promotion and nodulation. In the second experiment, inoculation of seven PGPR strains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phaseolus vulgaris; Co-inoculation; Endophytic bacteria; Rhizobia. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000600461 |
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| Navarrete,Acácio Aparecido; Taketani,Rodrigo Gouvêa; Mendes,Lucas William; Cannavan,Fabiana de Souza; Moreira,Fatima Maria de Souza; Tsai,Siu Mui. |
| The study of the ecology of soil microbial communities at relevant spatial scales is primordial in the wide Amazon region due to the current land use changes. In this study, the diversity of the Archaea domain (community structure) and ammonia-oxidizing Archaea (richness and community composition) were investigated using molecular biology-based techniques in different land-use systems in western Amazonia, Brazil. Soil samples were collected in two periods with high precipitation (March 2008 and January 2009) from Inceptisols under primary tropical rainforest, secondary forest (5-20 year old), agricultural systems of indigenous people and cattle pasture. Denaturing gradient gel electrophoresis of polymerase chain reaction-amplified DNA (PCR-DGGE) using the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil microbial ecology; Soil microbiology; Microbial diversity; Land use changes; Tropical soils. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832011000500007 |
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| Silva,Sérgio Henrique Godinho; Teixeira,Anita Fernanda dos Santos; Menezes,Michele Duarte de; Guilherme,Luiz Roberto Guimarães; Moreira,Fatima Maria de Souza; Curi,Nilton. |
| ABSTRACT Determination of soil properties helps in the correct management of soil fertility. The portable X-ray fluorescence spectrometer (pXRF) has been recently adopted to determine total chemical element contents in soils, allowing soil property inferences. However, these studies are still scarce in Brazil and other countries. The objectives of this work were to predict soil properties using pXRF data, comparing stepwise multiple linear regression (SMLR) and random forest (RF) methods, as well as mapping and validating soil properties. 120 soil samples were collected at three depths and submitted to laboratory analyses. pXRF was used in the samples and total element contents were determined. From pXRF data, SMLR and RF were used to predict soil... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil analyses; Spatial prediction; Proximal sensor.. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542017000600648 |
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| Registros recuperados: 31 | |
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