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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
14/06/1999 |
Data da última atualização: |
14/06/1999 |
Autoria: |
MARTINS, L. M. V.; NEVES, M. C. P.; RUMJANEK, N. G. |
Título: |
Growth characteristics and symbiotic efficiency of rhizobia isolated from cowpea nodules of the North-East region of Brazil. |
Ano de publicação: |
1997 |
Fonte/Imprenta: |
Soil Biology and Biochemistry, Oxford, v. 29, n. 5/6, p.1005-1010, 1997. |
Idioma: |
Inglês |
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 |
Palavras-Chave: |
Brasil; Caupi; Efficiency; Growth; Root nodulation. |
Thesagro: |
Crescimento; Eficiência Nutricional; Feijão de Corda; Nodulação; Nódulo; Rhizobium; Soja; Solo. |
Thesaurus Nal: |
Brazil; cowpeas; root nodules; soil; soybeans. |
Categoria do assunto: |
-- |
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
Biblioteca(s): |
Embrapa Trigo. |
Data corrente: |
30/07/2012 |
Data da última atualização: |
30/03/2017 |
Tipo da produção científica: |
Comunicado Técnico/Recomendações Técnicas |
Autoria: |
PASINATO, A.; CUNHA, G. R. da. |
Afiliação: |
ALDEMIR PASINATO, CNPT; GILBERTO ROCCA DA CUNHA, CNPT. |
Título: |
Informações meteorológicas de Passo Fundo, RS: março de 2011. |
Ano de publicação: |
2011 |
Fonte/Imprenta: |
Passo Fundo: Embrapa Trigo, 2011. |
Páginas: |
5 p. html. |
Série: |
(Embrapa Trigo. Comunicado técnico online, 294). |
ISSN: |
1517-4964 |
Idioma: |
Português |
Thesagro: |
Meteorologia. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/62582/1/2011comunicadotecnicoonline294.pdf
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Marc: |
LEADER 00485nam a2200157 a 4500 001 1929833 005 2017-03-30 008 2011 bl uuuu u0uu1 u #d 022 $a1517-4964 100 1 $aPASINATO, A. 245 $aInformações meteorológicas de Passo Fundo, RS$bmarço de 2011.$h[electronic resource] 260 $aPasso Fundo: Embrapa Trigo$c2011 300 $a5 p. html. 490 $a(Embrapa Trigo. Comunicado técnico online, 294). 650 $aMeteorologia 700 1 $aCUNHA, G. R. da
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