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| Leite,Jakson; Seido,Sirando Lima; Passos,Samuel Ribeiro; Xavier,Gustavo Ribeiro; Rumjanek,Norma Gouvêa; Martins,Lindete Míria Vieira. |
| The biodiversity of rhizobium in soils of the São Francisco Valley is unknown and can be studied using cowpea as trap plants. The objective of this study was to verify the diversity of diazotrophic bacteria that nodulate cowpea in soils of the lower half of the São Francisco River Valley by morphological and genotypic characterization. Seven soil samples (A1, A2, A3, A4, C1, C2 and MC) were collected to capture bacteria associated to five cowpea cultivars (IPA 206, BRS Pujante, BRS Marataoã, Canapu Roxo, and Sempre Verde), in a 5x7 factorial design with three replications. Thirty days after plant emergence, the nodules were collected and the bacteria isolated and analyzed in relation to their growth characteristics in YMA medium. The 581 isolates were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ARDRA; Biological nitrogen fixation; Vigna unguiculata. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832009000500015 |
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| Marinho,Rita de Cássia Nunes; Nóbrega,Rafaela Simão Abrahão; Zilli,Jerri Édson; Xavier,Gustavo Ribeiro; Santos,Carlos Antônio Fernandes; Aidar,Saulo de Tarso; Martins,Lindete Míria Vieira; Fernandes Júnior,Paulo Ivan. |
| The objective of this work was to evaluate the contribution of efficient nitrogen-fixing rhizobial strains to grain yield of new cowpea cultivars, indicated for cultivation in the Brazilian Semiarid region, in the sub-medium of the São Francisco River Valley. Two experiments were set up at the irrigated perimeters of Mandacaru (Juazeiro, state of Bahia) and Bebedouro (Petrolina, state of Pernambuco). The treatments consisted of single inoculation of five rhizobial strains - BR 3267, BR 3262, INPA 03-11B, UFLA 03-84 (Bradyrhizobiumsp.), and BR 3299T(Microvirga vignae) -, besides a treatment with nitrogen and a control without inoculation or N application. The following cowpea cultivars were evaluated: BRS Pujante, BRS Tapaihum, BRS Carijó, and BRS Acauã. A... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bradyrhizobium; Microvirga vignae; Vigna unguiculata; Biological nitrogenfixation; Inoculant. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2014000500395 |
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| Menezes,Kelly Alexsandra Souza; Escobar,Indra Elena Costa; Fraiz,Ana Carla Resende; Martins,Lindete Míria Vieira; Fernandes Júnior,Paulo Ivan. |
| ABSTRACT Legume-rhizobia symbiosis is a cross-kingdom association that results in large amounts of nitrogen incorporated in food webs. For the Brazilian semi-arid region, data on genetic variability and symbiotic efficiency of Papilionoidae rhizobial communities are very scarce. The aim of this study was to evaluate the genetic variability and the symbiotic efficiency of eight rhizobial isolates obtained from “mulungu” (Erythrina velutina Willd.) nodules. For 16S rRNA gene sequencing, the genomic DNA was extracted using a commercial kit, amplified with universal primers, and subjected to sequencing reactions. For the isolate ESA 71, PCR amplifications for nodC and nodA genes were attempted. Rhizobial efficiency was assessed by two greenhouse experiments.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological nitrogen fixation; “mulungu”; Tree legumes; “Caatinga”; Rhizobia. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100404 |
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| Pimentel,Márcio Sampaio; Carvalho,Rubens Silva; Martins,Lindete Míria Vieira; Silva,Adriano Victor Lopes da. |
| The goal of this work was to evaluate the response of edaphic macrofauna, soil microbial biomass carbon, soil basal respiration, metabolic quotient and labile carbon of fumigated soil in a Fluvic Neosol. The experimental design was in randomized blocks, with five treatments (four green manure mix and one control) and four replications, and subsequent planting of melon (Cucumis melo L.) under semi-arid conditions in Juazeiro, Bahia State, Brazil, from August 2006 to August 2007. Soil samples were collected at a depth of 0-10 cm at 6 days before, and 117; 215 and 354 days after green manure mix planting. The results indicate that none of the attributes presented a significant difference for the treatments, but changed significantly in relation to the time of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil quality; Macrofauna edaphic; Plant biomass; Plant mixture; Caatinga forest. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902011000400002 |
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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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| Fernandes-Júnior,Paulo Ivan; Aidar,Saulo de Tarso; Morgante,Carolina Vianna; Gava,Carlos Alberto Tuão; Zilli,Jerri Édson; Souza,Layane Silva Barbosa de; Marinho,Rita de Cássia Nunes; Nóbrega,Rafaela Simão Abrahão; Brasil,Marivaine da Silva; Seido,Sirando Lima; Martins,Lindete Míria Vieira. |
| Plant species that naturally occur in the Brazilian Caatinga(xeric shrubland) adapt in several ways to these harsh conditions, and that can be exploited to increase crop production. Among the strategic adaptations to confront low water availability, desiccation tolerance stands out. Up to now, the association of those species with beneficial soil microorganisms is not well understood. The aim of this study was to characterize Tripogon spicatusdiazotrophic bacterial isolates from the Caatingabiome and evaluate their ability to promote plant growth in rice. Sixteen bacterial isolates were studied in regard to their taxonomic position by partial sequencing of the 16S rRNA gene, putative diazotrophic capacity, in vitro indole-acetic acid (IAA) production and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biological nitrogen fixation; Inoculant; Diazotrophic bacteria; Semi-arid; Desiccation tolerant plants. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000400993 |
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