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Registro Completo |
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
13/04/2011 |
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Data da última atualização: |
07/06/2022 |
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Autoria: |
ZILLI, J. E.; VALISHESKI, R. R.; FREIRE FILHO, F. R.; NEVES, M. C. P.; RUMJANEK, N. G. |
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Afiliação: |
JERRI EDSON ZILLI, CPAF-RR; ROMANO ROBERTO VALISHESKI, UNIVERSIDADE ESTADUAL DO NORTE FLUMINENSE, CAMPOS DOS GOYTACAZES, RJ; FRANCISCO RODRIGUES FREIRE FILHO, CPAMN; MARIA CRISTINA PRATA NEVES, CPAMN; NORMA GOUVEA RUMJANEK, CNPAB. |
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Título: |
Assessment of cowpea Rhizobium diversity in cerrado areas of Northeastern Brazil. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Brazilian Journal of Microbiology, São Paulo, v. 35, p. 281-287, 2004. |
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Idioma: |
Inglês |
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Conteúdo: |
In order to 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 soybeam and rice-cowpea rotation . morphological traits (mucous productions and colony morphology), genotypic analyzes (ARDRA 16S) and intrinsic resistance to antibiotics were determined for a collection of isolates captured using cowpea as host-plant. The morphological data showed a inverse correlation (p> 0.05) bettween 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 native Cerrado areas were exclusively colonized by Bradyrhizobium elkanii, corroborating previous data. In the areas where legumes were grown, we observed two distinct situations: where soybean only were grown, a high proportion of B. japonicum was fond, and where soybean and cowpea were grown, we observed more B. elkanii. The analysis of antibiotic resistance revealed five different profiles. High percentage of antibioc resistant Bradyrhizobium spp. isolates were found in the areas cultivated for a long time, whereas the natives area and areas with a few crops had fewer resistant strain. There was an inverse relationship between intrinsic antibiotic resistance and rhizobial diversity, while the last decreases as more legume crops are introduced into the area, the former increases, uggesting that the presece of legumes may provide ecological conditions to select specific rhizobium gropus, which acquire competitiveness traits and become successfully established. MenosIn order to 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 soybeam and rice-cowpea rotation . morphological traits (mucous productions and colony morphology), genotypic analyzes (ARDRA 16S) and intrinsic resistance to antibiotics were determined for a collection of isolates captured using cowpea as host-plant. The morphological data showed a inverse correlation (p> 0.05) bettween 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 native Cerrado areas were exclusively colonized by Bradyrhizobium elkanii, corroborating previous data. In the areas where legumes were grown, we observed two distinct situations: where soybean only were grown, a high proportion of B. japonicum was fond, and where soybean and cowpea were grown, we observed more B. elkanii. The analysis of antibiotic resistance revealed five different profiles. High percentage of antibioc resistant Bradyrhizobium spp. isolates were found in the areas cultivated for a long time, whereas the natives area and areas with a few crops had fewer resistant strain. There was an inverse relationship between intrinsic antibiotic resistance and rhizobial diversity, while the last decreases as more legume crops are introduced... Mostrar Tudo |
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Palavras-Chave: |
Caupi; Cowpea. |
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Thesagro: |
Cerrado; Feijão de Corda; Rhizobium. |
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Thesaurus Nal: |
savannas. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/32561/1/NodulacaoCaupi.pdf
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Marc: |
LEADER 02383naa a2200241 a 4500
001 1885712
005 2022-06-07
008 2004 bl uuuu u00u1 u #d
100 1 $aZILLI, J. E.
245 $aAssessment of cowpea Rhizobium diversity in cerrado areas of Northeastern Brazil.
260 $c2004
520 $aIn order to 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 soybeam and rice-cowpea rotation . morphological traits (mucous productions and colony morphology), genotypic analyzes (ARDRA 16S) and intrinsic resistance to antibiotics were determined for a collection of isolates captured using cowpea as host-plant. The morphological data showed a inverse correlation (p> 0.05) bettween 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 native Cerrado areas were exclusively colonized by Bradyrhizobium elkanii, corroborating previous data. In the areas where legumes were grown, we observed two distinct situations: where soybean only were grown, a high proportion of B. japonicum was fond, and where soybean and cowpea were grown, we observed more B. elkanii. The analysis of antibiotic resistance revealed five different profiles. High percentage of antibioc resistant Bradyrhizobium spp. isolates were found in the areas cultivated for a long time, whereas the natives area and areas with a few crops had fewer resistant strain. There was an inverse relationship between intrinsic antibiotic resistance and rhizobial diversity, while the last decreases as more legume crops are introduced into the area, the former increases, uggesting that the presece of legumes may provide ecological conditions to select specific rhizobium gropus, which acquire competitiveness traits and become successfully established.
650 $asavannas
650 $aCerrado
650 $aFeijão de Corda
650 $aRhizobium
653 $aCaupi
653 $aCowpea
700 1 $aVALISHESKI, R. R.
700 1 $aFREIRE FILHO, F. R.
700 1 $aNEVES, M. C. P.
700 1 $aRUMJANEK, N. G.
773 $tBrazilian Journal of Microbiology, São Paulo$gv. 35, p. 281-287, 2004.
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Registro original: |
Embrapa Meio-Norte (CPAMN) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
30/10/1996 |
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Data da última atualização: |
21/06/2018 |
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Tipo da produção científica: |
Capítulo em Livro Técnico-Científico |
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Autoria: |
OLIVEIRA, E. R. de; JOHNSON, W. L. |
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Afiliação: |
Ederlon Ribeiro de Oliveira, CNPC; Willian L. Johnson, North Caroline State University, Raleigh (USA). |
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Título: |
Present and improved production systems for meat goats in Northeast Brasil. |
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Ano de publicação: |
1989 |
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Fonte/Imprenta: |
In: JOHNSON, W. L.; OLIVEIRA, E. R. de (Ed.). Improving meat goat production in the semiarid tropics. Sobral: EMBRAPA-CNPC; Davis: University of California, Small Ruminant Collaborative Research Support Program, SR-CRSP, 1989. p. 20-32. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Goat production in the semiarid tropics of Northeast Brazil, as well as in other semiarid developing regions, is characterized by its extensive management and low offtake. The caracterization of the semiarid rangeland of the area and a socioeconomic profile of the goats producers are presented in chapters 1 and 2. In this champter we give a general overview of land organization in Northeast Brazil, including the major crops and animal species utilized, and of the important of goats within this integrated production system. Finally we describe the actual status of goat keeping in this region, and where possible, we compare some results, obtained under experimental conditions with data from producers' herds. |
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Palavras-Chave: |
Brasil; Caprino de corte; Nordeste; Northeast; Production system. |
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Thesagro: |
Caprino; Carne; Sistema de produção; Sociologia Rural. |
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Thesaurus NAL: |
Brazil; Goats; Meat production. |
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Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
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Marc: |
LEADER 01631naa a2200277 a 4500
001 1514605
005 2018-06-21
008 1989 bl uuuu u00u1 u #d
100 1 $aOLIVEIRA, E. R. de
245 $aPresent and improved production systems for meat goats in Northeast Brasil.
260 $c1989
520 $aAbstract: Goat production in the semiarid tropics of Northeast Brazil, as well as in other semiarid developing regions, is characterized by its extensive management and low offtake. The caracterization of the semiarid rangeland of the area and a socioeconomic profile of the goats producers are presented in chapters 1 and 2. In this champter we give a general overview of land organization in Northeast Brazil, including the major crops and animal species utilized, and of the important of goats within this integrated production system. Finally we describe the actual status of goat keeping in this region, and where possible, we compare some results, obtained under experimental conditions with data from producers' herds.
650 $aBrazil
650 $aGoats
650 $aMeat production
650 $aCaprino
650 $aCarne
650 $aSistema de produção
650 $aSociologia Rural
653 $aBrasil
653 $aCaprino de corte
653 $aNordeste
653 $aNortheast
653 $aProduction system
700 1 $aJOHNSON, W. L.
773 $tIn: JOHNSON, W. L.; OLIVEIRA, E. R. de (Ed.). Improving meat goat production in the semiarid tropics. Sobral: EMBRAPA-CNPC; Davis: University of California, Small Ruminant Collaborative Research Support Program, SR-CRSP, 1989. p. 20-32.
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Embrapa Caprinos e Ovinos (CNPC) |
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