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| Registros recuperados: 59 | |
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| Farias, Thiago Palhares; Trochmann, Andre; Soares, Bruno Lima; Moreira, Fatima Maria Souza. |
| The objetives of the study were to evaluate the agronomic efficiency of strains approved as inoculants for cowpea and of three new strains under selection, as well as to evaluate the influence of liming on the symbiosis and productivity. Two field experiments were conducted using cowpea (BRS Guariba) from June to September 2013. In the first experiment, a completely randomized block experimental design was used, with four replicates and seven treatments (INPA03-11B, UFLA03-84, UFLA03-153, UFLA03-154, UFLA03-164 and two controls). In the second experiment, a 7 x 2 factorial design was used, with the above described treatments being the first factor and liming as the second factor. Parameters evaluated were: nodule dry matter, shoot dry matter, shoot N... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbiologia e Bioquímica do Solo 5.00.00.00-4 Vigna unguiculata; Bradyrhizobium; Acidity tolerance; Efficiency; Production system; Biology nitrogen fixation Microbiologia e Bioquímica do Solo. |
| Ano: 2016 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/28630 |
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| Pereira, Carlos Eduardo; Universidade Estadual de Santa Cruz; Moreira, Fátima Maria de Souza; Universidade Federal de Lavras; Oliveira, João Almir; Universidade Federal de Lavras; Caldeira, Carla Massimo; Universidade Federal de Lavras. |
| This research evaluated the development of soybean plants grown in a greenhouse, from seeds that were treated with fungicide, film coated and inoculated with Bradyrhizobium. Seeds from the soybean cultivar ‘Vencedora’ were submitted to treatments disposed in a factorial 5 x 3 x 2 design. The seeds were treated with Derosal Plus® with polymer; Tegran® with polymer; Derosal Plus® without polymer, Tegran® without polymer; and without fungicide and without polymer. After the chemical treatment, the seeds were inoculated with peat or liquid inoculants, and without inoculant. The chemical treatments were used either previous to or after the six months of storage. Seed inoculation was performed with CPAC15 and BR29 strains,... |
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Palavras-chave: 5.00.00.00-4; 5.01.00.00-9; 5.01.01.04-8; 5.01.02.05-2; 5.01.03.00-8; 5.01.03.03-2 Glycine Max; Polymer; Tegran; Derosal Plus; Bradyrhizobium Ciências Agrárias; Agronomia; Microbiologia e Bioquímica do Solo; Defesa Fitossanitária; Fitotecnia; Produção e Beneficiamento de Sementes Glycine Max; Polymer; Tegran; Derosal Plus; Bradyrhizobium. |
| Ano: 2010 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/5756 |
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| BRAGA,NELSON RAIMUNDO; VIEIRA,CLIBAS. |
| A cultura do grão-de-bico (Cicer arietinum L.) inexiste comercialmente no Brasil. No presente estudo, num podzólico vermelho-amarelo em Coimbra, microrregião de Viçosa, Minas Gerais, desenvolveram-se dois experimentos com grão-de-bico: um com o cultivar IAC-Marrocos e o outro com o 'IAC Índia-4'. Os tratamentos constituíram um fatorial 24, no qual os fatores foram: Bradyrhizobium sp. (inoculação das sementes ou não), adubação nitrogenada em cobertura (0 ou 30 kg.ha-1 de N), molibdênio em pulverização foliar, na forma de molibdato de amônio (0 ou 40 g.ha-1) e micronutrientes (aplicação ou não de Zn, B, Cu, Fe, Mn e Mo na forma FTE BR-12). Todas as parcelas receberam o equivalente a 450 kg.ha-1 de superfosfato simples. A inoculação com rizóbio aumentou 104%... |
| Tipo: Info:eu-repo/semantics/report |
Palavras-chave: Cicer arietinum; Bradyrhizobium; Adubação nitrogenada; Micronutrientes; Molibdênio. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87051998000200016 |
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| Marinho,Rita de Cássia Nunes; Ferreira,Linnajara de Vasconcelos Martins; Silva,Aleksandro Ferreira da; Martins,Lindete Míria Vieira; Nóbrega,Rafaela Simão Abrahão; Fernandes-Júnior,Paulo Ivan. |
| ABSTRACT Cowpea is a very important crop to Brazilian Semi-Arid mainly small family-based farmers. Rhizobia inoculation is a practice, easy to use, and cheap technology that increases cowpea productivity. The aim of this study was to evaluate the efficiency of two new rhizobia isolates in greenhouse and field as well as classify them taxonomically. To bacterial identification the 16S rRNA gene of ESA 17 and ESA 18 isolates were sequenced. The greenhouse test was conducted with pots containing 3 L of soil and the bacterial isolates evaluated were ESA 17, ESA 18, BR 3267 or BR 3262 strains. A field experiment was implemented on a Vertisol in Juazeiro, Bahia State, to evaluate the cowpea growth and productivity. In this experiment, the peat-based inoculants... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Inoculant; Biological nitrogen fixation; Strain selection; São Francisco River Valley. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200273 |
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| Oliveira,Arlem Nascimento de; Oliveira,Luiz Antonio de; Andrade,Jerusa Souza. |
| Amylase production and partial characterization of crude enzyme preparations from two rhizobia strains (R-926 and R-991) were evaluated. For both the strains, maximal amylase activities were achieved during the early-to-mid- exponential growth phase; both were active over a pH range from 4.5 to 8.5 and temperature from 30 to 50 ºC. None of the ions studied (K+, Na+, Ca2+, Hg2+, Mg2+, Mn2+, Cu2+ and Zn2+) was required for the catalytic activity of strain R-926; amylase activity of strain R-991 was stimulated in the presence of K+, Hg2+ and Zn2+. The surfactants SDS, Triton X-100 and Tween-80 did not have a pronounced inhibitory effect on enzyme activities; SDS and Tween-80 caused the highest stimulatory effects. Amylase activities from the rhizobia strains... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rhizobium; Bradyrhizobium; Amylase production; Enzymatic properties. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100005 |
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| Delić,Duica; Stajković,Olivera; Rasulić,Nataa; Kuzmanović,Djordje; Joić,Dragana; Miličić,Bogić. |
| In pot experiment, one isolate Knj from a Serbian soil, four strains of Bradyrhizobium japonicum and three strains of Bradyrhizobium spp. were examined for the effect on adzuki bean nodulation and effectiveness in symbiotic N2 fixation. All the tested strains produced root nodules in adzuki bean. Strains of B. japonicum showed high potential of N2 fixation, particularly 525 and 542. B. japonicum strains resulted 65-71% shoot dry weight and 99-138% total N content of uninoculated control with full N content (100%). No significant difference was found between the plants inoculated with Bradyrhizobium spp. strains and uninoculated control plants without N (40-42 and 42% shoot dry weight, respectively), which indicated symbiotic N2 fixation inactivity of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Adzuki bean; Nodulation; Symbiotic N fixation. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000200007 |
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| Soares,René Arderius; Passaglia,Luciane Maria Pereira. |
| Bradyrhizobium elkanii is successfully used in the formulation of commercial inoculants and, together with B. japonicum, it fully supplies the plant nitrogen demands. Despite the similarity between B. japonicum and B. elkanii species, several works demonstrated genetic and physiological differences between them. In this work Representational Difference Analysis (RDA) was used for genomic comparison between B. elkanii SEMIA 587, a crop inoculant strain, and B. japonicum USDA 110, a reference strain. Two hundred sequences were obtained. From these, 46 sequences belonged exclusively to the genome of B. elkanii strain, and 154 showed similarity to sequences from B. japonicum genome. From the 46 sequences with no similarity to sequences from B. japonicum, 39... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Genome comparison; Nitrogen fixation; Representational difference analysis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400036 |
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| Zilli,Jerri Édson; Valisheski,Romano Roberto; Freire Filho,Francisco Rodrigues; Neves,Maria Cristina Prata; Rumjanek,Norma Gouvêa. |
| In order to contribute for the optimization of biological nitrogen fixation (BNF) associated with cowpea in Cerrado areas in the Northeast region of Brazil, this work aimed to analyze the diversity of rhizobial populations in eight areas of Cerrado, during a soybean and rice-cowpea rotation. Morphological traits (mucous production and colony morphology), genotypic analyzes (ARDRA 16S) and intrinsic resistance to antibiotics were determined for a collection of isolates captured using cowpea as a host-plant. The morphological data showed a inverse correlation (p < 0.05) between the number of legume (soybean and cowpea) crops, according to the history of each area, and rhizobium diversity, estimated by the Shannon-Weaver index. ARDRA data showed that... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Bradyrhizobium; Cerrado; Cowpea; Antibiotic. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300002 |
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| Delamuta,Jakeline Renata Marçon; Ribeiro,Renan Augusto; Menna,Pâmela; Bangel,Eliane Villamil; Hungria,Mariangela. |
| Symbiotic association of several genera of bacteria collectively called as rhizobia and plants belonging to the family Leguminosae (=Fabaceae) results in the process of biological nitrogen fixation, playing a key role in global N cycling, and also bringing relevant contributions to the agriculture. Bradyrhizobium is considered as the ancestral of all nitrogen-fixing rhizobial species, probably originated in the tropics. The genus encompasses a variety of diverse bacteria, but the diversity captured in the analysis of the 16S rRNA is often low. In this study, we analyzed twelve Bradyrhizobium strains selected from previous studies performed by our group for showing high genetic diversity in relation to the described species. In addition to the 16S rRNA,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological nitrogen fixation; Bradyrhizobium; Multilocus sequence analysis; Phylogeny; Taxonomy. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200035 |
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| Teixeira,Keyla Rafaelly Gramosa; Gonçalves Filho,Luiz Alberto Ribeiro; Carvalho,Eulália Maria Sousa; Araújo,Ademir Sérgio Ferreira de; Santos,Valdinar Bezerra dos. |
| O objetivo deste trabalho foi avaliar o efeito do lodo de curtume sobre a fertilidade do solo, a nodulação e rendimento de matéria seca do caupi. O estudo foi conduzido em casa-de-vegetação, utilizando-se lodo de curtume adicionado ao solo, sendo em seguida plantadas sementes de caupi inoculadas com Bradyrhizobium sp. Os dados foram coletados aos 35 e 49 dias após a emergência das plantas. O lodo de curtume elevou o pH e os teores de matéria orgânica, cálcio e sódio do solo. Além disso, houve aumento na salinidade do solo com a aplicação do resíduo. Por outro lado, houve um incremento no rendimento de matéria seca do caupi com a adição do lodo de curtume, embora, em altas doses, o resíduo tenha diminuído a nodulação do caupi pela estirpe de Bradyrhizobium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Indicador biológico; Vigna unguiculata. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542006000600004 |
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| Xavier,Terezinha Ferreira; Araújo,Ademir Sérgio Ferreira de; Santos,Valdinar Bezerra dos; Campos,Francilene Leonel. |
| O objetivo deste trabalho foi avaliar a ontogenia da nodulação em duas cultivares de feijão-caupi. O experimento foi conduzido em casa de vegetação utilizando-se as cultivares "BRS-Guariba" e "BRS-Marataoã" cultivadas em sacos plásticos com 5kg de areia. A adubação mineral, isenta de N, foi realizada na véspera da semeadura e as sementes foram inoculadas com Bradyrhizobium sp, estirpe BR 2001. As avaliações foram realizadas aos 10, 20, 30, 40, 50, 60 e 70 dias após emergência das plantas, sendo determinados o número, a massa seca e o tamanho dos nódulos e a matéria seca da parte aérea. As cultivares apresentaram maior número de nódulos aos 30 e 50 dias após a emergência. A massa e o tamanho dos nódulos aumentaram durante o ciclo das cultivares. A matéria... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leguminosas; Fixação de N2; Bradyrhizobium. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782007000200042 |
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| Xavier,Terezinha Ferreira; Araújo,Ademir Sérgio Ferreira de; Santos,Valdinar Bezerra dos; Campos,Francilene Leonel. |
| O objetivo deste trabalho foi avaliar a influência da inoculação e da adubação nitrogenada sobre a nodulação e a produtividade do feijão-caupi. O estudo foi conduzido em uma área experimental, em Parnaíba, PI. Os tratamentos foram dispostos em delineamento em blocos ao acaso em arranjo fatorial de 5 x 2, sendo cinco doses de N (0, 20, 40, 80 e 160kg ha-1 de N) e dois tratamentos microbiológicos (com e sem inoculação). No tratamento com inoculação, foi utilizado um inoculante contendo Bradyrhizobium sp, estirpe BR2001. A avaliação da nodulação e da produtividade de grãos foi realizada aos 36 e 65 dias após a emergência das plantas, respectivamente. Houve interação significativa entre inoculação e doses de N para todas as variáveis analisadas, sendo a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nitrogênio; Fixação biológica de N; Bradyrhizobium; Vigna unguiculata. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782008000700038 |
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| Passaglia,Luciane M. P.. |
| Abstract A successful symbiotic relationship between soybean [Glycine max (L.) Merr.] and Bradyrhizobium species requires expression of the bacterial structural nod genes that encode for the synthesis of lipochitooligosaccharide nodulation signal molecules, known as Nod factors (NFs). Bradyrhizobium diazoefficiens USDA 110 possesses a wide nodulation gene repertoire that allows NF assembly and modification, with transcription of the nodYABCSUIJnolMNOnodZ operon depending upon specific activators, i.e., products of regulatory nod genes that are responsive to signaling molecules such as flavonoid compounds exuded by host plant roots. Central to this regulatory circuit of nod gene expression are NodD proteins, members of the LysR-type regulator family. In... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; NodD1 protein; Nod box; Nod genes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572017000400703 |
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| Registros recuperados: 59 | |
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