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Id: biblio-1047367
Autor: Qureshi, M. Amjad; Tariq Pervez, Muhammad; Ellahi Babar, Masroor; Hussain, Tanveer; Shoaib, Muhammad; Shah Mohammad, Syed.
Título: Genomic comparisons of Rhizobium species using in silico AFLP-PCR, endonuclease restriction, and AMPylating enzymes
Fonte: Electron. j. biotechnol;34:67-75, july. 2018. graf, tab.
Idioma: en.
Resumo: Background: The whole-genome sequences of nine Rhizobium species were evaluated using different in silico molecular techniques such as AFLP-PCR, restriction digest, and AMPylating enzymes. The entire genome sequences were aligned with progressiveMauve and visualized by reconstructing phylogenetic tree using NTSYS pc 2.11X. The "insilico.ehu.es" was used to carry out in silico AFLP-PCR and in silico restriction digest of the selected genomes. Post-translational modification (PTM) and AMPylating enzyme diversity between the proteome of Rhizobium species were determined by novPTMenzy. Results: Slight variations were observed in the phylogeny based on AFLP-PCR and PFGE and the tree based on whole genome. Results clearly demonstrated the presence of PTMs, i.e., AMPylation with the GS-ATasE (GlnE), Hydroxylation, Sulfation with their domain, and Deamidation with their specific domains (AMPylating enzymes) GS-ATasE (GlnE), Fic, and Doc (Phosphorylation); Asparagine_hydroxylase and Collagen_prolyl_lysyl_hydroxylase; Sulfotransferase; and CNF (Cytotoxic Necrotizing Factors), respectively. The results pertaining to PTMs are discussed with regard to functional diversities reported in these species. Conclusions: The phylogenetic tree based on AFLP-PCR was slightly different from restriction endonuclease- and PFGE-based trees. Different PTMs were observed in the Rhizobium species, and the most prevailing type of PTM was AMPylation with the domain GS-ATasE (GlnE). Another type of PTM was also observed, i.e., Hydroxylation and Sulfation, with the domains Asparagine_hydroxylase and Collagen_prolyl_lysyl_hydroxylase and Sulfotransferase, respectively. The deamidation type of PTM was present only in Rhizobium sp. NGR234. How to cite: Qureshi MA, Pervez MT, Babar ME, et al. Genomic comparisons of Rhizobium species using in silico AFLP-PCR, endonuclease restrictions and ampylating enzymes.
Descritores: Rhizobium/genética
-Filogenia
Rhizobium/enzimologia
Rhizobium/fisiologia
Simbiose
Simulação por Computador
Enzimas de Restrição do DNA
Reação em Cadeia da Polimerase/métodos
Análise de Sequência
Proteoma
Genômica
Análise do Polimorfismo de Comprimento de Fragmentos Amplificados
Fabaceae/microbiologia
Responsável: CL1.1 - Biblioteca Central


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Id: biblio-1171774
Autor: Spagnoletti Federico N; Fernandez di Pardo Agustina; Tobar Gómez Natalia E; Chiocchio Viviana M.
Título: Las micorrizas arbusculares y Rhizobium: una simbiosis dual de interés / [Arbuscular mycorrhizae and Rhizobium: a dual symbiosis of interest].
Fonte: Rev. argent. microbiol;45(2):131-2, jun. 2013.
Idioma: es.
Descritores: Micorrizas
Rhizobium
-Rhizobium/fisiologia
Simbiose
Tipo de Publ: Artigo de Revista
Responsável: AR5.1 - Centro de Gestión del Conocimiento y las Comunicaciónes


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Id: biblio-886675
Autor: PRASAD, ANDHARE A; BABU, SUBRAMANIAN.
Título: Compatibility of Azospirillum brasilense and Pseudomonas fluorescens in growth promotion of groundnut ( Arachis hypogea L)
Fonte: An. acad. bras. ciênc;89(2):1027-1040, Apr.-June 2017. tab, graf.
Idioma: en.
Resumo: ABSTRACT We attempted to study the compatibility among plant beneficial bacteria in the culture level by growing them near in the nutrient agar plates. Among all the bacteria tested, Rhizobium was found to inhibit the growth of other bacteria. From the compatible group of PGPR, we have selected one biofertilizer (Azospirillum brasilense strain TNAU) and one biocontrol agent (Pseudomonas fluorescens strain PF1) for further studies in the pot culture. We have also developed a bioformulation which is talc powder based, for individual bacteria and mixed culture. This formulation was used as seed treatment, soil application, seedling root dip and foliar spray in groundnut crop in vitro germination conditions. A. brasilense was found to enhance the tap root growth and P. fluorescens, the lateral root growth. The other growth parameters like shoot growth, number of leaves were enhanced by the combination of both of the bacteria than their individual formulations. Among the method of application tested in our study, soil application was found to be the best in yielding better results of plant growth promotion.
Descritores: Arachis/crescimento & desenvolvimento
Arachis/microbiologia
Pseudomonas fluorescens/fisiologia
Azospirillum brasilense/fisiologia
Fertilizantes
-Rhizobium/fisiologia
Sementes/crescimento & desenvolvimento
Sementes/microbiologia
Microbiologia do Solo
Azotobacter/fisiologia
Bacillus megaterium/fisiologia
Bacillus subtilis/fisiologia
Raízes de Plantas/crescimento & desenvolvimento
Raízes de Plantas/microbiologia
Folhas de Planta
Plântula/crescimento & desenvolvimento
Plântula/microbiologia
Tipo de Publ: Estudo de Avaliação
Responsável: BR1.1 - BIREME


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Id: biblio-947001
Autor: Fonseca, Guilherme Godoy; Oliveira, Dâmiany Pádua; Soares, Bruno Lima; Ferreira, Paulo Ademar Avelar; Teixeira, Cícero Monti; Martins, Fábio Aurélio Dias; Moreira, Fatima Maria de Souza; Andrade, Messias José Bastos de.
Título: Resposta de cultivares de feijoeiro-comum à inoculação das sementes com duas estirpes de rizóbio / Common bean cultivars response to seed inoculation with two rhizobium strains
Fonte: Biosci. j. (Online);29(6):1778-1787, nov./dec. 2013. tab, graf.
Idioma: pt.
Resumo: Fixação simbiótica de nitrogênio pode ser uma alternativa para reduzir, ou mesmo substituir, a adubação nitrogenada do feijoeiro-comum, cultura na qual ainda há descrédito quanto aos benefícios da inoculação e que se caracteriza por aplicações de altas doses de N mineral. Com o objetivo de verificar a resposta de cultivares de feijoeiro-comum à inoculação das sementes com duas estirpes de rizóbio, foram conduzidos dois experimentos de campo na safra de inverno 2010 (Patos de Minas e Uberaba, MG). Utilizou-se o delineamento em blocos casualizados, com três repetições e esquema fatorial 8 x 3, envolvendo oito cultivares (União, Madrepérola, Supremo, Ouro Negro, Ouro Vermelho e Majestoso) e três tipos de inoculação (sementes não inoculadas e estirpes CIAT 899T e UFLA 04-173). Na floração, avaliaram-se o número e massa seca de nódulos, massa seca de parte aérea e teor e acúmulo de nitrogênio (N) na parte aérea e, na colheita, o rendimento de grãos com seus componentes primários, teor e acúmulo de N nos grãos. Constatou-se que as populações nativas promovem nodulação equivalente à das estirpes inoculadas. As estirpes CIAT 899T e UFLA 04-173 favorecem o crescimento vegetativo do feijoeiro. A estirpe CIAT 899T proporciona maior número de vagens e maior massa de grãos que a estirpe UFLA 04-173, e em Uberaba também proporciona maior rendimento de grãos. Quando a inoculação é realizada com a estirpe UFLA 04-173, as cultivares diferem quanto ao teor foliar de N. As cultivares Madrepérola, Ouro Negro e Ouro Vermelho apresentam mais nódulos e maior massa seca de parte aérea, além de maior produtividade em Patos de Minas. Ouro Negro situa-se entre as mais produtivas em Uberaba. Em Uberaba há maior acúmulo de matéria seca de nódulos e de parte aérea, mas o ambiente Patos de Minas resulta em maiores valores do rendimento de grãos e componentes.

The symbiotic nitrogen fixation can be an alternative to reduce, or even replace, the nitrogen (N) fertilization of the common bean crop, characterized by application of high doses of this nutrient. This work aimed to verify the response of common bean cultivars to the seed inoculation with two Rhizobium strains, conducting two field experiments in the winter-spring crop of 2010, at Patos de Minas and Uberaba, Minas Gerais State, Brazil. The experiment had a randomized block design, with three replications and a 8 x 3 factorial squemme, involving eight cultivars and three levels of inoculation. At flowering, it was evaluated the number of nodules, nodules dry mass, shoots dry weight, N content and accumulation in shoots and, at harvest, the grain yield and its primary components (100 grains weight, number of pods per plant, number of grains per pod) and the N content and accumulation in the grains. The Madrepérola, Ouro Negro and Ouro Vermelho cultivars present the highest number of nodules and higher dry mass; in Patos de Minas, the same cultivars show higher productivity, but in Uberaba, only Ouro Negro cultivar is among the most productive. In Uberaba there is the greater nodules dry weight and higher shoots dry matter, but the most favorable conditions in Patos de Minas results in higher values for grain yield and its components. In Uberaba, the CIAT 899T strain overcomes the UFLA 04-173 strain in relation to grain yield. In both environments, the CIAT 899T strain also shows superiority in number of pods per plant and weight of one hundred grains.
Descritores: Rhizobium
Phaseolus
Nodulação
Fixação de Nitrogênio
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-951798
Autor: Rodrigues, Dalila Ribeiro; Silva, Aleksandro Ferreira da; Cavalcanti, Maria Idaline Pessoa; Escobar, Indra Elena Costa; Fraiz, Ana Carla Resende; Ribeiro, Paula Rose de Almeida; Ferreira Neto, Reginaldo Alves; Freitas, Ana Dolores Santiago de; Fernandes-Júnior, Paulo Ivan.
Título: Phenotypic, genetic and symbiotic characterization of Erythrina velutina rhizobia from Caatinga dry forest
Fonte: Braz. j. microbiol;49(3):503-512, July-Sept. 2018. tab, graf.
Idioma: en.
Projeto: Brazilian Council for Scientific and Technological Development.
Resumo: Abstract Erythrina velutina ("mulungu") is a legume tree from Caatinga that associates with rhizobia but the diversity and symbiotic ability of "mulungu" rhizobia are poorly understood. The aim of this study was to characterize "mulungu" rhizobia from Caatinga. Bacteria were obteined from Serra Talhada and Caruaru in Caatinga under natural regeneration. The bacteria were evaluated to the amplification of nifH and nodC and to metabolic characteristics. Ten selected bacteria identified by 16S rRNA sequences. They were tested in vitro to NaCl and temperature tolerance, auxin production and calcium phosphate solubilization. The symbiotic ability were assessed in an greenhouse experiment. A total of 32 bacteria were obtained and 17 amplified both symbiotic genes. The bacteria showed a high variable metabolic profile. Bradyrhizobium (6), Rhizobium (3) and Paraburkholderia (1) were identified, differing from their geographic origin. The isolates grew up to 45 °C to 0.51 mol L-1 of NaCl. Bacteria which produced more auxin in the medium with l-tryptophan and two Rhizobium and one Bradyrhizobium were phosphate solubilizers. All bacteria nodulated and ESA 90 (Rhizobium sp.) plus ESA 96 (Paraburkholderia sp.) were more efficient symbiotically. Diverse and efficient rhizobia inhabit the soils of Caatinga dry forests, with the bacterial differentiation by the sampling sites.
Descritores: Rhizobium/fisiologia
Simbiose
Bradyrhizobium/fisiologia
Erythrina/microbiologia
-Fenótipo
Filogenia
Rhizobium/isolamento & purificação
Rhizobium/genética
DNA Bacteriano/genética
RNA Ribossômico 16S/genética
Cloreto de Sódio/metabolismo
Florestas
Bradyrhizobium/isolamento & purificação
Bradyrhizobium/genética
Erythrina/fisiologia
Responsável: BR1.1 - BIREME


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Id: biblio-839350
Autor: Cardoso, Aline Assis; Andraus, Michel de Paula; Borba, Tereza Cristina de Oliveira; Martin-Didonet, Claudia Cristina Garcia; Ferreira, Enderson Petrônio de Brito.
Título: Characterization of rhizobia isolates obtained from nodules of wild genotypes of common bean
Fonte: Braz. j. microbiol;48(1):43-50, Jan.-Mar. 2017. tab, graf.
Idioma: en.
Resumo: Abstract This study aimed to evaluate the tolerance to salinity and temperature, the genetic diversity and the symbiotic efficiency of rhizobia isolates obtained from wild genotypes of common bean cultivated in soil samples from the States of Goiás, Minas Gerais and Paraná. The isolates were subjected to different NaCl concentrations (0%, 1%, 2%, 4% and 6%) at different temperatures (28 °C, 33 °C, 38 °C, 43 °C and 48 °C). Genotypic characterization was performed based on BOX-PCR, REP-PCR markers and 16S rRNA sequencing. An evaluation of symbiotic efficiency was carried out under greenhouse conditions in autoclaved Leonard jars. Among 98 isolates about 45% of them and Rhizobium freirei PRF81 showed a high tolerance to temperature, while 24 isolates and Rhizobium tropici CIAT899 were able to use all of the carbon sources studied. Clustering analysis based on the ability to use carbon sources and on the tolerance to salinity and temperature grouped 49 isolates, R. tropici CIAT899 and R. tropici H12 with a similarity level of 76%. Based on genotypic characterization, 65% of the isolates showed an approximately 66% similarity with R. tropici CIAT899 and R. tropici H12. About 20% of the isolates showed symbiotic efficiency similar to or better than the best Rhizobium reference strain (R. tropici CIAT899). Phylogenetic analysis of the 16S rRNA revealed that two efficient isolates (ALSG5A1 and JPrG6A8) belong to the group of strains used as commercial inoculant for common bean in Brazil and must be assayed in field experiments.
Descritores: Rhizobium/fisiologia
Simbiose
Phaseolus/genética
Phaseolus/microbiologia
Nódulos Radiculares de Plantas/microbiologia
Genótipo
-Filogenia
Rhizobium/isolamento & purificação
Rhizobium/classificação
Adaptação Biológica
Carbono/metabolismo
RNA Ribossômico 16S/genética
Phaseolus/classificação
Meio Ambiente
Tolerância ao Sal
Responsável: BR1.1 - BIREME


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Id: biblio-947180
Autor: Ferreira, Enderson Petronio de Brito; Knupp, Adriano Moreira; Didonet, Claudia Cristina Garcia Martin.
Título: Crescimento de cultivares de arroz (Oryza sativa L. ) influenciado pela inoculação com bactérias promotoras de crescimento de plantas / Growth of rice cultivars (Oryza sativa L. ) as affected by inoculation with plant growth-promoting bacteria
Fonte: Biosci. j. (Online);30(3):655-665, may/june 2014. tab, ilus.
Idioma: pt.
Resumo: Este trabalho objetivou avaliar o efeito da inoculação de seis estirpes de bactérias promotoras de crescimento de plantas (BPCP), Burkholderia spp. (B7 e B16), Pseudomonas spp. (P18 e P21) e Rhizobium spp. (R65 e R82) e duas misturas contendo uma estirpe de cada gênero no crescimento de seis cultivares de arroz (BRS Bonança, BRS Aimoré, BRS Talento, BRSMG Curinga, Japonês e Bolinha). As características fisiológicas das bactérias foram determinadas em ensaios in vitro. Foi conduzido um experimento sob condições de casa de vegetação onde as BPCP foram inoculadas em cultivares de arroz, cultivados em vasos contendo 1 kg de solo, em delineamento de blocos casualizados com 4 repetições. Aos 60 dias após a emergência foram avaliados parâmetros de crescimentos relacionados à parte aérea e ao sistema radicular dos cultivares de arroz. Entre as bactérias, somente duas (B7 e R65) não apresentaram capacidade de produção in vitro de auxina. Todas as estirpes apresentaram atividade de catalase e formação de película em meio NFb semi-sólido sem N ou presença de nódulo em feijoeiro, indicando capacidade de fixação biológica de nitrogênio. A inoculação das BPCP em arroz proporcionou aumentos médios de 10% em relação ao controle para a área foliar e massa seca da parte aérea e de 9% para o comprimento e massa seca de raiz. Entre os cultivares, BRS Aimoré apresentou maior interação com as estirpes estudadas e a estirpe P21 de Pseudomonas spp. proporcionou diferença significativa em relação ao controle em parâmetros relacionados à parte aérea e ao sistema radicular.

Aiming to evaluate the effect of the inoculation of six strains of plant growth-promoting bacteria (PGPBs) Burkholderia spp. (B7 and B16), Pseudomonas spp. (P18 and P21) and Rhizobium spp. (R65 and R82) and two mixtures containing one strain of each genera on the growth of six rice cultivars (BRS Bonança, BRS Aimoré, BRS Talento, BRSMG Curinga, Japonês and Bolinha). Physiological characteristics of the bacteria were determined on in vitro assays. Rice cultivars were inoculated with PGPB under greenhouse conditions and cultivated on 1 kg pots filled with soil on a randomized block design with four replicates. At 60 days after emergence growth parameters related with the shoot and root were evaluated for rice cultivars. Among the evaluated bacteria only two (B7 and R65) were not able to produce auxin under in vitro conditions. All strains showed catalase activity and film formation in semisolid medium NFb without N or nodulation in common bean, indicating the ability of biological nitrogen fixation. Inoculation of PGPBs in rice provided increases of 10% as compared to the control regarding leaf area and dry mass of shoots and 9% for length and root dry weight. Among the cultivars BRS Aimoré showed greater interaction with the strains studied and the strain P21 of Pseudomonas spp. promoted significant difference compared to the control for the parameters related with the shoot and root system.
Descritores: Pseudomonas
Rhizobium
Oryza/crescimento & desenvolvimento
Burkholderia
-Genótipo
Responsável: BR396.1 - Biblioteca Central


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Id: biblio-834460
Autor: Steiner, Bruna; Vieira, Fabiane J; Alves, Marcelle Duarte; Perez, Leandro R. R.
Título: Rhizobium radiobacter recovered from blood of a pediatric patient with stem cell transplantation: a case report and characterization of antimicrobial susceptibility profile
Fonte: Clin. biomed. res;34(3):318-321, 2014. tab.
Idioma: en.
Resumo: Rhizobium radiobacter is an uncommon agent of infection and has been associated with indwelling intravascular devices such as catheter in immunocompromised patients. Here, we report a case of R. radiobacter recovered from blood cultures in stem cell transplantation in a pediatric patient and present an extensive characterization of its antimicrobial susceptibility profile. The isolate presented low MICs to many antimicrobial agents, but high MICs to ceftazidime, piperacillin-tazobactam, aztreonam, and fosfomycin.
Descritores: Anti-Infecciosos/administração & dosagem
Infecções por Bactérias Gram-Negativas/tratamento farmacológico
Infecções por Bactérias Gram-Negativas/sangue
Técnicas Microbiológicas
Rhizobium/imunologia
Rhizobium/isolamento & purificação
Rhizobium/patogenicidade
-Testes de Sensibilidade Microbiana
Neutropenia Febril Induzida por Quimioterapia/etiologia
Neutropenia Febril Induzida por Quimioterapia/tratamento farmacológico
Pré-Medicação/efeitos adversos
Transplante de Células-Tronco
Limites: Humanos
Masculino
Criança
Tipo de Publ: Relatos de Casos
Responsável: BR18.1 - Biblioteca FAMED/HCPA


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Id: lil-755827
Autor: Ruíz-Valdiviezo, Víctor Manuel; Canseco, Lucía María Cristina Ventura; Suárez, Luis Antonio Castillo; Gutiérrez-Miceli, Federico Antonio; Dendooven, Luc; Rincón-Rosales, Reiner.
Título: Symbiotic potential and survival of native rhizobia kept on different carriers
Fonte: Braz. j. microbiol;46(3):735-742, July-Sept. 2015. tab, ilus.
Idioma: en.
Resumo:

Native rhizobia are ideal for use as commercial legume inoculants. The characteristics of the carrier used to store the inoculants are important for the survival and symbiotic potential of the rhizobia. The objective of this study was to investigate the effects of peat (PEAT), perlite sugarcane bagasse (PSB), carboxymethyl cellulose plus starch (CMCS), and yeast extract mannitol supplemented with mannitol (YEMM) on the survival, nodulation potential and N2 fixation capacity of the native strains Sinorhizobium mexicanum ITTG R7T and Rhizobium calliandrae LBP2-1T and of the reference strain Rhizobium etli CFN42T. A factorial design (4 × 3) with four repetitions was used to determine the symbiotic potential of the rhizobial strains. The survival of the strains was higher for PEAT (46% for strain LBP2-1T, 167% for strain CFN42T and 219% for strain ITTG R7T) than for the other carriers after 240 days, except for CFN42T kept on CMCS (225%). All the strains kept on the different carriers effectively nodulated common bean, with the lowest number of nodules found (5 nodules) when CFN42T was kept on CMCS and with the highest number of nodules found (28 nodules) when ITTG R7T was kept on PSB. The nitrogenase activity was the highest for ITTG R7T kept on PEAT (4911 μmol C2H4 per fresh weight nodule h−1); however, no activity was found when the strains were kept on YEMM. Thus, the survival and symbiotic potential of the rhizobia depended on the carrier used to store them.

.
Descritores: Fertilizantes/microbiologia
Phaseolus/crescimento & desenvolvimento
Phaseolus/microbiologia
Rhizobium/metabolismo
Sinorhizobium/metabolismo
Simbiose/fisiologia
-Óxido de Alumínio/química
Carboximetilcelulose Sódica/química
Celulose/química
Manitol/química
Fixação de Nitrogênio/fisiologia
Nodulação/fisiologia
Rizosfera
Microbiologia do Solo
Dióxido de Silício/química
Solo/química
Amido/análogos & derivados
Amido/química
Leveduras/química
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: BR1.1 - BIREME


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Id: lil-734588
Autor: Angulo, Violeta C; Sanfuentes, Eugenio A; Rodríguez, Francisco; Sossa, Katherine E.
Título: Caracterización de rizobacterias promotoras de crecimiento en plántulas de Eucalyptus nitens / Characterization of growth-promoting rhizobacteria in Eucalyptus nitens seedlings
Fonte: Rev. argent. microbiol;46(4):338-347, dic. 2014. graf, tab.
Idioma: es.
Resumo: Se aislaron bacterias rizosféricas y endófitas a partir de rizósfera y tejidos de raíz de árboles de Eucalyptus nitens con el objetivo de evaluar su capacidad de promover el crecimiento en plántulas de la misma especie en condiciones de invernadero. Los aislamientos que incrementaron el crecimiento de las plántulas fueron identificados y caracterizados por su capacidad de producir ácido indolacético (AIA), solubilizar fosfato y expresar la 1-aminociclopropano-1-carboxilato (ACC) desaminasa. Los 105 aislamientos obtenidos fueron morfológicamente diferentes y solo 15 promovieron significativamente el crecimiento de plántulas de E. nitens. Los máximos incrementos observados fueron en el peso seco aéreo (142 %) y de la raíz (135 %); también aumentaron la altura de las plantas (50 %) y el largo de raíces (45 %) de las mismas. Las rizobacterias pertenecieron a los géneros Arthrobacter, Lysinibacillus, Rahnella y Bacillus. Los aislados identificados como A. phenanthrenivorans 21 y B. cereus 113 incrementaron la emergencia de E. nitens a los 12 días en un valor promedio de 3,15 veces con relación al control. R. aquatilis aislado 78 presentó la mayor producción de AIA (97,5 ± 2,87 μg/ml) en presencia de triptófano y el mayor índice de solubilización de fósforo (2,4). B. amyloliquefaciens aislado 60 fue positivo para la actividad ACC desaminasa. Los resultados obtenidos indican el potencial de las rizobacterias estudiadas como promotoras de emergencia y crecimiento de plántulas de E. nitens y su posible uso como inoculantes, ya que presentan más de un mecanismo de acción asociado a la promoción del crecimiento.

Rhizospheric and endophytic bacteria were isolated from the rizosphere and root tissue of Eucalyptus nitens. The objective of this work was to evaluate their capacity to promote growth in seedlings of the same species under greenhouse conditions. The isolates that improved seedling growth were identified and characterized by their capacity to produce indoleacetic acid (IAA), solubilize phosphates and increase 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity. One hundred and five morphologically different strains were isolated, 15 of which promoted E. nitens seedling growth, significantly increasing the height (50%), root length (45%) as well as the aerial and root dry weight (142% and 135% respectively) of the plants. Bacteria belonged to the genus Arthrobacter, Lysinibacillus, Rahnella and Bacillus. Isolates A. phenanthrenivorans 21 and B. cereus 113 improved 3.15 times the emergence of E. nitens after 12 days, compared to control samples. Among isolated R. aquatilis, 78 showed the highest production of IAA (97.5±2.87 μg/ml) in the presence of tryptophan and the highest solubilizer index (2.4) for phosphorus, while B. amyloliquefaciens 60 isolate was positive for ACC deaminase activity. Our results reveal the potential of the studied rhizobacteria as promoters of emergence and seedling growth of E. nitens, and their possible use as PGPR inoculants, since they have more than one mechanism associated with plant growth promotion.
Descritores: Eucalyptus/microbiologia
Rhizobium/isolamento & purificação
Rhizobium/fisiologia
Plântula/crescimento & desenvolvimento
Plântula/microbiologia
-Raízes de Plantas/microbiologia
Tipo de Publ: Research Support, Non-U.S. Gov't
Responsável: AR1.2 - Instituto de Investigaciónes Epidemiológicas



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BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde