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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
14/06/1999 |
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Data da última atualização: |
14/06/1999 |
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Autoria: |
MARTINS, L. M. V.; NEVES, M. C. P.; RUMJANEK, N. G. |
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Título: |
Growth characteristics and symbiotic efficiency of rhizobia isolated from cowpea nodules of the North-East region of Brazil. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
Soil Biology and Biochemistry, Oxford, v. 29, n. 5/6, p.1005-1010, 1997. |
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Idioma: |
Inglês |
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Conteúdo: |
In Brazil, the geo-environmental conditions of the north-east region exert an effect on the rhizobia diversity. A large collection of rhizobia isolates were obtained from nodules of cowpea planted in different soils from this region of Brazil. Cowpea was selected as the scavenger for this study of rhizobia diversity because it is a known broad host-range leguminous plant and it is also widespread in the region. A total of 536 nodule isolates were obtained and later arranged in 78 different groups based on colony morphology and growth. Growth in culture media of isolate representatives of these groups revealed that 27 of them showed fast growth characteristics although the plant is characteristically nodulated by strains described as Bradyrhizobium spp. Furthermore, the analysis of the isolates from each region showed an increased proportion of fast-growing rhizobia when going from the coast to the semi-arid region. Fifty-five of the rhizobia representatives from the Brazilian north-east region induced Hup+ phenotype in cowpea nodules indicating the predominance of this phenotype. They were also inoculated into soybean, since this legume plant is nodulated by the slow-growing rhizobia species B. japonicum and B. elkanii. Twenty-five of the group representatives were not capable of nodulating soybean. Inoculation with some of them promoted the formation of pseudo-nodule structures which despite not contributing significantly to the nitrogen content of the plant are an indication that signal exchange between plant and rhizobia is occurring. The remaining isolate representatives were capable of nodulating soybean. The nodulation of soybean by the isolates in soils of the semi-arid region of Brazil is quite remarkable since this crop has never been cultivated in the region before. Data on host-regulated uptake hydrogenase phenotype (Hup-hr) is discussed. MenosIn Brazil, the geo-environmental conditions of the north-east region exert an effect on the rhizobia diversity. A large collection of rhizobia isolates were obtained from nodules of cowpea planted in different soils from this region of Brazil. Cowpea was selected as the scavenger for this study of rhizobia diversity because it is a known broad host-range leguminous plant and it is also widespread in the region. A total of 536 nodule isolates were obtained and later arranged in 78 different groups based on colony morphology and growth. Growth in culture media of isolate representatives of these groups revealed that 27 of them showed fast growth characteristics although the plant is characteristically nodulated by strains described as Bradyrhizobium spp. Furthermore, the analysis of the isolates from each region showed an increased proportion of fast-growing rhizobia when going from the coast to the semi-arid region. Fifty-five of the rhizobia representatives from the Brazilian north-east region induced Hup+ phenotype in cowpea nodules indicating the predominance of this phenotype. They were also inoculated into soybean, since this legume plant is nodulated by the slow-growing rhizobia species B. japonicum and B. elkanii. Twenty-five of the group representatives were not capable of nodulating soybean. Inoculation with some of them promoted the formation of pseudo-nodule structures which despite not contributing significantly to the nitrogen content of the plant are an indicati... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Caupi; Efficiency; Growth; Root nodulation. |
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Thesagro: |
Crescimento; Eficiência Nutricional; Feijão de Corda; Nodulação; Nódulo; Rhizobium; Soja; Solo. |
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Thesaurus Nal: |
Brazil; cowpeas; root nodules; soil; soybeans. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02839naa a2200361 a 4500
001 1621096
005 1999-06-14
008 1997 bl uuuu u00u1 u #d
100 1 $aMARTINS, L. M. V.
245 $aGrowth characteristics and symbiotic efficiency of rhizobia isolated from cowpea nodules of the North-East region of Brazil.
260 $c1997
520 $aIn Brazil, the geo-environmental conditions of the north-east region exert an effect on the rhizobia diversity. A large collection of rhizobia isolates were obtained from nodules of cowpea planted in different soils from this region of Brazil. Cowpea was selected as the scavenger for this study of rhizobia diversity because it is a known broad host-range leguminous plant and it is also widespread in the region. A total of 536 nodule isolates were obtained and later arranged in 78 different groups based on colony morphology and growth. Growth in culture media of isolate representatives of these groups revealed that 27 of them showed fast growth characteristics although the plant is characteristically nodulated by strains described as Bradyrhizobium spp. Furthermore, the analysis of the isolates from each region showed an increased proportion of fast-growing rhizobia when going from the coast to the semi-arid region. Fifty-five of the rhizobia representatives from the Brazilian north-east region induced Hup+ phenotype in cowpea nodules indicating the predominance of this phenotype. They were also inoculated into soybean, since this legume plant is nodulated by the slow-growing rhizobia species B. japonicum and B. elkanii. Twenty-five of the group representatives were not capable of nodulating soybean. Inoculation with some of them promoted the formation of pseudo-nodule structures which despite not contributing significantly to the nitrogen content of the plant are an indication that signal exchange between plant and rhizobia is occurring. The remaining isolate representatives were capable of nodulating soybean. The nodulation of soybean by the isolates in soils of the semi-arid region of Brazil is quite remarkable since this crop has never been cultivated in the region before. Data on host-regulated uptake hydrogenase phenotype (Hup-hr) is discussed.
650 $aBrazil
650 $acowpeas
650 $aroot nodules
650 $asoil
650 $asoybeans
650 $aCrescimento
650 $aEficiência Nutricional
650 $aFeijão de Corda
650 $aNodulação
650 $aNódulo
650 $aRhizobium
650 $aSoja
650 $aSolo
653 $aBrasil
653 $aCaupi
653 $aEfficiency
653 $aGrowth
653 $aRoot nodulation
700 1 $aNEVES, M. C. P.
700 1 $aRUMJANEK, N. G.
773 $tSoil Biology and Biochemistry, Oxford$gv. 29, n. 5/6, p.1005-1010, 1997.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio-Norte. |
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Data corrente: |
11/12/2017 |
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Data da última atualização: |
13/12/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
PONTE FILHO, F, A. M. da; SOUSA, I. M. de; ALMEIDA, B. K. da S.; SANTOS, M. A. do; SOUZA, H. A. de; LISBOA, F. G. |
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Afiliação: |
FRANCISCO AUGUSTO MACHADO DA PONTE FILHO, UEVA; IVANDERLETE MARQUES DE SOUSA, UEVA; BRENA KELLY DA SILVA ALMEIDA, UFLA; MILENA ALVES DO SANTOS, UEVA; HENRIQUE ANTUNES DE SOUZA, CPAMN; FERNANDO GUEDES LISBOA, CNPC. |
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Título: |
Abordagem multivariada para recomendação de sorgo forrageiro no semiárido cearense. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE AGRONOMIA, 30., 2017, Fortaleza. Segurança hídrica: um desafio para os engenheiros agrônomos do Brasil; [anais]. Fortaleza: AEAC; CONFAEAB, 2017. |
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Páginas: |
4 f. |
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Idioma: |
Português |
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Conteúdo: |
A decisão de quais culturas forrageiras plantar nas regiões semiáridas brasileira não é um processo fácil, devido as instabilidades climáticas decorrente em cada safra agrícola. Dessa forma, o presente trabalho objetivou-se comparar o desempenho fenotípico de cultivares híbridas e variedades da cultura do sorgo para a produção de forragem com o auxílio do método gráfico para análise multivariada, em região norte cearense. O ensaio foi conduzido envolvendo cultivares tanto de variedades (V) quanto de híbridos simples de sorgo. O delineamento experimental utilizado foi o de bloco ao acaso com três repetições. Foram avaliados 17 caracteres pela análise de variância e posteriormente analisadas pelo método gráfico com análise multivariada, que permitiu uma melhor decisão sobre o desempenho entre as cultivares da cultura quando se consideram grandes quantidades de caracteres. As cultivares de sorgo hibrido BRS 716 e o sorgo BRS 655 apresentam bom desempenho produtivo e nutricional em condições de semiárido. |
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Palavras-Chave: |
Melhoramento genético. |
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Thesagro: |
Forragem; Variedade. |
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Categoria do assunto: |
G Melhoramento Genético |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/168602/1/Resumo-CBA-Abordagem-multivariada.pdf
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Marc: |
LEADER 01819nam a2200217 a 4500
001 2082079
005 2023-12-13
008 2017 bl uuuu u00u1 u #d
100 1 $aPONTE FILHO, F, A. M. da
245 $aAbordagem multivariada para recomendação de sorgo forrageiro no semiárido cearense.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE AGRONOMIA, 30., 2017, Fortaleza. Segurança hídrica: um desafio para os engenheiros agrônomos do Brasil; [anais]. Fortaleza: AEAC; CONFAEAB$c2017
300 $a4 f.
520 $aA decisão de quais culturas forrageiras plantar nas regiões semiáridas brasileira não é um processo fácil, devido as instabilidades climáticas decorrente em cada safra agrícola. Dessa forma, o presente trabalho objetivou-se comparar o desempenho fenotípico de cultivares híbridas e variedades da cultura do sorgo para a produção de forragem com o auxílio do método gráfico para análise multivariada, em região norte cearense. O ensaio foi conduzido envolvendo cultivares tanto de variedades (V) quanto de híbridos simples de sorgo. O delineamento experimental utilizado foi o de bloco ao acaso com três repetições. Foram avaliados 17 caracteres pela análise de variância e posteriormente analisadas pelo método gráfico com análise multivariada, que permitiu uma melhor decisão sobre o desempenho entre as cultivares da cultura quando se consideram grandes quantidades de caracteres. As cultivares de sorgo hibrido BRS 716 e o sorgo BRS 655 apresentam bom desempenho produtivo e nutricional em condições de semiárido.
650 $aForragem
650 $aVariedade
653 $aMelhoramento genético
700 1 $aSOUSA, I. M. de
700 1 $aALMEIDA, B. K. da S.
700 1 $aSANTOS, M. A. do
700 1 $aSOUZA, H. A. de
700 1 $aLISBOA, F. G.
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