Consulta: subjectFacets:"Nitrogen-fixing bacteria"
Registros recuperados: 5
Data/hora: 05/06/2024 01:58:00

Dinámica de microorganismos rizosféricos y filosféricos de Annona diversifolia Saff. Como respuesta a la estacionalidad, fenología y defoliación en el trópico seco
Provedor de dados: 32
Autores: Cortés Sarabia, Jazmín.
La ilama es una planta frutícola tropical, cuya distribución se encuentra restringida a México,  Centroamérica y parte de Sudamérica y cuyo cultivo es de importancia local. Dado el escaso  conocimiento sobre la dinámica microbiana en este tipo de cultivo, este estudio tuvo como  objetivo evaluar el efecto de la estacionalidad, fenología y defoliación sobre la dinámica  poblacional microbiana en filósfera y rizosfera de plantas de ilama (Annona diversifolia Saff.),  en campo e invernadero. Se evaluaron plantas de tres edades en cuatro épocas del año en San  Antonio de las Huertas, Guerrero. Se evaluaron las unidades formadoras de colonias (UFC) de  hongos, actinomicetos, bacterias totales así como bacterias fijadoras de nitrógeno pertenecientes  a los...
Tipo: Tesis
Palavras-chave: Bacterias fijadoras de nitrógeno; Bacterias solubilizadoras de fosfatos; Fenología; Estacionalidad; Defoliación; Micorriza arbuscular; Maestría; Edafología; Nitrogen-fixing bacteria; Solubilizing phosphate bacteria; Phenology; Seasonality; Defoliation; Arbuscular mycorrhizae.
Ano: 2008
URL: http://hdl.handle.net/10521/1267

Bukholderia strains promote Mimosa spp. growth but not Macroptilium atropurpureum
Provedor de dados: 124
Autores: 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

Solubilisation of inorganic phosphates by inoculant strains from tropical legumes
Provedor de dados: 63
Autores: Marra,Leandro Marciano; Oliveira,Silvia Maria de; Soares,Cláudio Roberto Fonsêca Sousa; Moreira,Fatima Maria de Souza.
Microbial solubilisation of low soluble inorganic phosphates is an important process contributing for the phosphorus available to plants in tropical soils. This study evaluates the ability of inoculant strains for tropical legumes to solubilise inorganic phosphates of low solubility that are found in tropical soils. Seven strains of Leguminosae nodulating bacteria (LNB) were compared with one another and with a non-nodulating positive control, Burkholderia cepacia (LMG 1222T). Four of the strains are used as inoculants for cowpeas (Vigna unguiculata) (Bradyrhizobium sp. UFLA 03-84; Bradyrhizobium elkani INPA 03-11B and Bradyrhizobium japonicum BR3267) or for common beans (Phaseolus vulgaris) (Rhizobium tropici CIAT 899T). Rhizobium etli UFLA 02-100 and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhizobium; Bradyrhizobium; Cupriavidus; Phosphate-solubilising bacteria; Nitrogen-fixing bacteria.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000500015

Evaluation of impacts of potato crops and livestock farming in Neotropical high Andean Páramo soils, Colombia
Provedor de dados: 109
Autores: Farfán,María-Alejandra; Forero,Sandra-Milena; Avellaneda-Torres,Lizeth-Manuela.
Abstract Páramos are Neotropical ecosystems that result from insular formations dominated by tufted hair grasses and shrubs, and are located above the continuous forest track and below the perpetual snowline of the highest peaks in the Northern Andes. The aim of this research was to check the reliability of the hypothesis that the potato cultivation and livestock farming activities modify the quality of Páramo soils. For this, soil samples were taken from soil used with three different purposes at two different heights: Páramo with the least possible intervention, and Páramo where the activities of potato cropping and livestock farming were carried out; from these, and that have been determined to have physicochemical properties, abundance of functional...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cellulolytic microorganisms; Enzymatic activities; Nitrogen-fixing bacteria; Phosphate solubilizing bacteria; Soil physicochemical properties.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000200106

Associative diazotrophic bacteria in grass roots and soils from heavy metal contaminated sites
Provedor de dados: 42
Autores: Moreira,Fátima M.S.; Lange,Anderson; Klauberg-Filho,Osmar; Siqueira,José O.; Nóbrega,Rafaela S.A.; Lima,Adriana S.
This work aimed to evaluate density of associative diazotrophic bacteria populations in soil and grass root samples from heavy metal contaminated sites, and to characterize isolates from these populations, both, phenotypically (Zinc, Cadmium and NaCl tolerance in vitro, and protein profiles) and genotypically (16S rDNA sequencing), as compared to type strains of known diazotrophic species. Densities were evaluated by using NFb, Fam and JNFb media, commonly used for enrichment cultures of diazotrophic bacteria. Bacterial densities found in soil and grass root samples from contaminated sites were similar to those reported for agricultural soils. Azospirillum spp. isolates from contaminated sites and type strains from non-contaminated sites varied...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Azospirillum; Zinc; Cadmium; Soil contaminants; Nitrogen-fixing bacteria.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000400014