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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
15/03/1999 |
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Data da última atualização: |
15/03/1999 |
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Autoria: |
XAVIER, G. R.; MARTINS, L. M. V.; NEVES, Maria Cristina P.; RUMJANEK, Norma G. |
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Título: |
Heat tolerant strains of cowpea rhizobia isolated from the North-East region of Brazil. |
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Ano de publicação: |
1997 |
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Fonte/Imprenta: |
In: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE BIOQUIMICA E BIOLOGIA MOLECULAR, 26., maio 1997, Caxambu. Resumos... Caxambu: Sociedade Brasileira de Bioquimica e Biologia Molecular, 1997. p.49. |
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Idioma: |
Inglês |
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Conteúdo: |
Temperature is a factor which limits growth, survival, competitiveness and population size of soil rhizobia and nitrogen-fixing activity when the bacteria are associated with leguminous roots. Thus, it is not surprising that rhizobia strains nodulating cowpea, which grows well in semi-arid areas showing high daily temperatures, are tolerant to these conditions. This study aims to select heat tolerant inoculants for cowpea growing in the north-east region of Brazil, from a collection of rhizobia that has already been characterized regarding other parameters, such as nodulation, efficiency, Hup phenotype and intrinsic antibiotic resistance. Seventy-eight isolates from a variety of soils were studied, which had been collected at both a semi-arid and tropical rain forest areas located at the same latitude in the north-east region of Brazil. The assay was performed in YEM medium at 28 graus C, as a control, at 39 graus C and 42 graus C to determine heat tolerant strains. In this region, the fast-growing rhizobia population was significant and 96% of them were tolerant to 39 graus C, while only 63% of slow-growers were capable of developing under this condition. Thirty percent of isolates from the semi-arid region showed tolerance to 42 graus C againt 18% of the isolates from the tropical rain forest region. Comparing these results with the ones obtained for strains BR 96 and BR 29 (B. elkanii), BR 33 (B. japonicum) commonly used for soybean crops, and BR 2001 (Bradyrhizobium sp) recommended for cowpea, it was... MenosTemperature is a factor which limits growth, survival, competitiveness and population size of soil rhizobia and nitrogen-fixing activity when the bacteria are associated with leguminous roots. Thus, it is not surprising that rhizobia strains nodulating cowpea, which grows well in semi-arid areas showing high daily temperatures, are tolerant to these conditions. This study aims to select heat tolerant inoculants for cowpea growing in the north-east region of Brazil, from a collection of rhizobia that has already been characterized regarding other parameters, such as nodulation, efficiency, Hup phenotype and intrinsic antibiotic resistance. Seventy-eight isolates from a variety of soils were studied, which had been collected at both a semi-arid and tropical rain forest areas located at the same latitude in the north-east region of Brazil. The assay was performed in YEM medium at 28 graus C, as a control, at 39 graus C and 42 graus C to determine heat tolerant strains. In this region, the fast-growing rhizobia population was significant and 96% of them were tolerant to 39 graus C, while only 63% of slow-growers were capable of developing under this condition. Thirty percent of isolates from the semi-arid region showed tolerance to 42 graus C againt 18% of the isolates from the tropical rain forest region. Comparing these results with the ones obtained for strains BR 96 and BR 29 (B. elkanii), BR 33 (B. japonicum) commonly used for soybean crops, and BR 2001 (Bradyrhizobium sp)... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Isolation; Temperature resistance. |
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Thesagro: |
Feijão de Corda; Isolamento; Resistência a Temperatura; Rhizobium. |
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Thesaurus Nal: |
Brazil; cowpeas. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02409naa a2200265 a 4500
001 1620978
005 1999-03-15
008 1997 bl uuuu u00u1 u #d
100 1 $aXAVIER, G. R.
245 $aHeat tolerant strains of cowpea rhizobia isolated from the North-East region of Brazil.
260 $c1997
520 $aTemperature is a factor which limits growth, survival, competitiveness and population size of soil rhizobia and nitrogen-fixing activity when the bacteria are associated with leguminous roots. Thus, it is not surprising that rhizobia strains nodulating cowpea, which grows well in semi-arid areas showing high daily temperatures, are tolerant to these conditions. This study aims to select heat tolerant inoculants for cowpea growing in the north-east region of Brazil, from a collection of rhizobia that has already been characterized regarding other parameters, such as nodulation, efficiency, Hup phenotype and intrinsic antibiotic resistance. Seventy-eight isolates from a variety of soils were studied, which had been collected at both a semi-arid and tropical rain forest areas located at the same latitude in the north-east region of Brazil. The assay was performed in YEM medium at 28 graus C, as a control, at 39 graus C and 42 graus C to determine heat tolerant strains. In this region, the fast-growing rhizobia population was significant and 96% of them were tolerant to 39 graus C, while only 63% of slow-growers were capable of developing under this condition. Thirty percent of isolates from the semi-arid region showed tolerance to 42 graus C againt 18% of the isolates from the tropical rain forest region. Comparing these results with the ones obtained for strains BR 96 and BR 29 (B. elkanii), BR 33 (B. japonicum) commonly used for soybean crops, and BR 2001 (Bradyrhizobium sp) recommended for cowpea, it was...
650 $aBrazil
650 $acowpeas
650 $aFeijão de Corda
650 $aIsolamento
650 $aResistência a Temperatura
650 $aRhizobium
653 $aBrasil
653 $aIsolation
653 $aTemperature resistance
700 1 $aMARTINS, L. M. V.
700 1 $aNEVES, Maria Cristina P.
700 1 $aRUMJANEK, Norma G.
773 $tIn: REUNIAO ANUAL DA SOCIEDADE BRASILEIRA DE BIOQUIMICA E BIOLOGIA MOLECULAR, 26., maio 1997, Caxambu. Resumos... Caxambu: Sociedade Brasileira de Bioquimica e Biologia Molecular, 1997. p.49.
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado. |
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Data corrente: |
01/03/2023 |
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Data da última atualização: |
01/03/2023 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
BAMBERG, A. L.; SILVEIRA, C. A. P.; FERREIRA, L. H. G.; MILECH, R.; BARTELS, G. K.; PAULETTO, E. A. |
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Afiliação: |
ADILSON LUIS BAMBERG, CPACT; CARLOS AUGUSTO POSSER SILVEIRA, CPACT; LUIS HENRIQUE GULARTE FERREIRA, IFRS; RICARDO MILECH, UNIVERSIDADE FEDERAL DE PELOTAS; GUILHERME KRÜGER BARTELS, UNIVERSIDADE FEDERAL DE PELOTAS; ELOY ANTONIO PAULETTO, UNIVERSIDADE FEDERAL DE PELOTAS. |
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Título: |
Influência da variabilidade espacial da resistência mecânica do solo à penetração no planejamento de experimento de campo. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. [Uberlândia]: SBCS: UFU, ICIAG, 2011. 1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
A resistência mecânica do solo à penetração (RP) tende a variar consideravelmente no espaço, podendo afetar os resultados de uma determinada variável resposta em experimentos de campo. Em um experimento de campo cultivado com cana-de-açúcar buscou-se identificar a estrutura e as causas da variabilidade espacial da RP em diferentes camadas do solo até 40 cm de profundidade. |
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Palavras-Chave: |
Penetrógrafo. |
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Thesagro: |
Campo Experimental; Cana de Açúcar; Compactação do Solo; Mecânica do Solo; Pesquisa Agrícola; Planejamento de Pesquisa; Resistência; Solo. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1152014/1/1778-1.pdf
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Marc: |
LEADER 01399nam a2200277 a 4500
001 2152014
005 2023-03-01
008 2011 bl uuuu u00u1 u #d
100 1 $aBAMBERG, A. L.
245 $aInfluência da variabilidade espacial da resistência mecânica do solo à penetração no planejamento de experimento de campo.$h[electronic resource]
260 $aIn: CONGRESSO BRASILEIRO DE CIÊNCIA DO SOLO, 33., 2011, Uberlândia. Solos nos biomas brasileiros: sustentabilidade e mudanças climáticas: anais. [Uberlândia]: SBCS: UFU, ICIAG, 2011. 1 CD-ROM.$c2011
520 $aA resistência mecânica do solo à penetração (RP) tende a variar consideravelmente no espaço, podendo afetar os resultados de uma determinada variável resposta em experimentos de campo. Em um experimento de campo cultivado com cana-de-açúcar buscou-se identificar a estrutura e as causas da variabilidade espacial da RP em diferentes camadas do solo até 40 cm de profundidade.
650 $aCampo Experimental
650 $aCana de Açúcar
650 $aCompactação do Solo
650 $aMecânica do Solo
650 $aPesquisa Agrícola
650 $aPlanejamento de Pesquisa
650 $aResistência
650 $aSolo
653 $aPenetrógrafo
700 1 $aSILVEIRA, C. A. P.
700 1 $aFERREIRA, L. H. G.
700 1 $aMILECH, R.
700 1 $aBARTELS, G. K.
700 1 $aPAULETTO, E. A.
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Embrapa Clima Temperado (CPACT) |
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