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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
23/05/2002 |
Data da última atualização: |
12/07/2007 |
Autoria: |
FAQUIN, V.; LIMA, D. V.; FURTINI NETO, A. E.; MORAIS, A. R. de; CURI, N.; HIGA, N. T. |
Título: |
Nutricao mineral do braquiarao e da soja cultivados em latossolos sob cerrado da regiao de Cuiaba - MT. |
Ano de publicação: |
2000 |
Fonte/Imprenta: |
Ciencia e Agroteconologia, Lavras, v. 24, n. 1, p. 110-117, 2000. |
Idioma: |
Português |
Conteúdo: |
Avaliou-se o estado nutricional do braquiarao e da soja cultivados em amostras (0-20 cm) de dois Latossolos - Latossolo Vermelho-escuro (LE), argiloso e Latossolo Vermelho-Escuro (LV), textura media, sob cerrado, coletados na regiao de Cuiaba, MT. Os experimentos foram conduzidos em casa-de-vegetacao do DCS / UFLA, Lavras - MG, usando o delineamento experimental inteiramente casualizado, em esquema fatorial 11x12, com 11 tratamentos baseados na tecnica por subtracao, dois solos (LE LV), com tres repeticoes. Realizaram-se tres cultivos da soja, coletados nas fases de pre-florestamento e florescimento, respectivamente.Os teores e as acumulacoes dos marco e micronutrientes na materia seca da parte aerea das especies foram determinados em cada corte ou cultivo. Os resultados mostraram que os solos estudados não supriram as exigencias nutricionais do baquiarao e da soja em macronutrientes, a deficiencia de B foi constatada no terceiro cultivo da soja. As diferencas nas exigencias nutricionais das especies foram nem expressas pelos sintomas visuais de braquiarao de P, N, S, e K, da mesma maneira para a< soja de Ca, P, S, N, e Mg. Sintomas de toxidade de Mn no solos sem calagem mostrou-se fundamental para a soja no fornecimento de Ca de Mg, neutralizacao de Mn e possivelmente do Al toxicos; para ao braquiarao Sua relevancia esta mais relacionada ao fornecimento de Ca e Mg como nutrientes de que na correcao da acidez.
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Palavras-Chave: |
Brasil; Cuiaba; Mato Grosso; Mineral nutrients; Nutriente minera. |
Thesagro: |
Brachiaria Brizantha; Cerrado; Glycine Max; Latossolo; Soja. |
Thesaurus Nal: |
Ferralsols; soybeans. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02305naa a2200325 a 4500 001 1564850 005 2007-07-12 008 2000 bl --- 0-- u #d 100 1 $aFAQUIN, V. 245 $aNutricao mineral do braquiarao e da soja cultivados em latossolos sob cerrado da regiao de Cuiaba - MT. 260 $c2000 520 $aAvaliou-se o estado nutricional do braquiarao e da soja cultivados em amostras (0-20 cm) de dois Latossolos - Latossolo Vermelho-escuro (LE), argiloso e Latossolo Vermelho-Escuro (LV), textura media, sob cerrado, coletados na regiao de Cuiaba, MT. Os experimentos foram conduzidos em casa-de-vegetacao do DCS / UFLA, Lavras - MG, usando o delineamento experimental inteiramente casualizado, em esquema fatorial 11x12, com 11 tratamentos baseados na tecnica por subtracao, dois solos (LE LV), com tres repeticoes. Realizaram-se tres cultivos da soja, coletados nas fases de pre-florestamento e florescimento, respectivamente.Os teores e as acumulacoes dos marco e micronutrientes na materia seca da parte aerea das especies foram determinados em cada corte ou cultivo. Os resultados mostraram que os solos estudados não supriram as exigencias nutricionais do baquiarao e da soja em macronutrientes, a deficiencia de B foi constatada no terceiro cultivo da soja. As diferencas nas exigencias nutricionais das especies foram nem expressas pelos sintomas visuais de braquiarao de P, N, S, e K, da mesma maneira para a< soja de Ca, P, S, N, e Mg. Sintomas de toxidade de Mn no solos sem calagem mostrou-se fundamental para a soja no fornecimento de Ca de Mg, neutralizacao de Mn e possivelmente do Al toxicos; para ao braquiarao Sua relevancia esta mais relacionada ao fornecimento de Ca e Mg como nutrientes de que na correcao da acidez. 650 $aFerralsols 650 $asoybeans 650 $aBrachiaria Brizantha 650 $aCerrado 650 $aGlycine Max 650 $aLatossolo 650 $aSoja 653 $aBrasil 653 $aCuiaba 653 $aMato Grosso 653 $aMineral nutrients 653 $aNutriente minera 700 1 $aLIMA, D. V. 700 1 $aFURTINI NETO, A. E. 700 1 $aMORAIS, A. R. de 700 1 $aCURI, N. 700 1 $aHIGA, N. T. 773 $tCiencia e Agroteconologia, Lavras$gv. 24, n. 1, p. 110-117, 2000.
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Embrapa Cerrados (CPAC) |
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Registro Completo
Biblioteca(s): |
Embrapa Solos. |
Data corrente: |
20/09/2021 |
Data da última atualização: |
20/09/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Internacional - A |
Autoria: |
OLIVEIRA, V. M. de; MANFIO, G. P.; COUTINHO, H. L. da C.; KEIJZER-WOLTERS, A. C.; ELSAS, J. D. van. |
Afiliação: |
VALÉRIA MAIA DE OLIVEIRA, UNICAMP; GILSON PAULO MANFIO, UNICAMP; HEITOR LUIZ DA COSTA COUTINHO, CNPS; ANNEKE CHRISTINA KEIJZER-WOLTERS, Plant Research International; JAN DIRK VAN ELSAS, University of Groningen. |
Título: |
A ribosomal RNA gene intergenic spacer based PCR and DGGE fingerprinting method for the analysis of specific rhizobial communities in soil. |
Ano de publicação: |
2006 |
Fonte/Imprenta: |
Journal of Microbiological Methods, v. 64, n. 3, p. 366-379, Mar. 2006. |
DOI: |
https://doi.org/10.1016/j.mimet.2005.05.015 |
Idioma: |
Inglês |
Conteúdo: |
A direct molecular method for assessing the diversity of specific populations of rhizobia in soil, based on nested PCR amplification of 16S-23S ribosomal RNA gene (rDNA) intergenic spacer (IGS) sequences, was developed. Initial generic amplification of bacterial rDNA IGS sequences from soil DNA was followed by specific amplification of (1) sequences affiliated with Rhizobium leguminosarum "sensu lato" and (2) R. tropici. Using analysis of the amplified sequences in clone libraries obtained on the basis of soil DNA, this two-sided method was shown to be very specific for rhizobial subpopulations in soil. It was then further validated as a direct fingerprinting tool of the target rhizobia based on denaturing gradient gel electrophoresis (DGGE). The PCR-DGGE approach was applied to soils from fields in Brazil cultivated with common bean (Phaseolus vulgaris) under conventional or no-tillage practices. The community fingerprints obtained allowed the direct analysis of the respective rhizobial community structures in soil samples from the two contrasting agricultural practices. Data obtained with both primer sets revealed clustering of the community structures of the target rhizobial types along treatment. Moreover, the DGGE profiles obtained with the R. tropici primer set indicated that the abundance and diversity of these organisms were favoured under NT practices. These results suggest that the R. leguminosarum-as well as R. tropici-targeted IGS-based nested PCR and DGGE are useful tools for monitoring the effect of agricultural practices on these and related rhizobial subpopulations in soils. MenosA direct molecular method for assessing the diversity of specific populations of rhizobia in soil, based on nested PCR amplification of 16S-23S ribosomal RNA gene (rDNA) intergenic spacer (IGS) sequences, was developed. Initial generic amplification of bacterial rDNA IGS sequences from soil DNA was followed by specific amplification of (1) sequences affiliated with Rhizobium leguminosarum "sensu lato" and (2) R. tropici. Using analysis of the amplified sequences in clone libraries obtained on the basis of soil DNA, this two-sided method was shown to be very specific for rhizobial subpopulations in soil. It was then further validated as a direct fingerprinting tool of the target rhizobia based on denaturing gradient gel electrophoresis (DGGE). The PCR-DGGE approach was applied to soils from fields in Brazil cultivated with common bean (Phaseolus vulgaris) under conventional or no-tillage practices. The community fingerprints obtained allowed the direct analysis of the respective rhizobial community structures in soil samples from the two contrasting agricultural practices. Data obtained with both primer sets revealed clustering of the community structures of the target rhizobial types along treatment. Moreover, the DGGE profiles obtained with the R. tropici primer set indicated that the abundance and diversity of these organisms were favoured under NT practices. These results suggest that the R. leguminosarum-as well as R. tropici-targeted IGS-based nested PCR and DGGE are us... Mostrar Tudo |
Palavras-Chave: |
Culture-independent analysis; DGGE; Diversity; RDNA spacer; Rhizobia. |
Thesaurus NAL: |
Soil management. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02461naa a2200253 a 4500 001 2134556 005 2021-09-20 008 2006 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1016/j.mimet.2005.05.015$2DOI 100 1 $aOLIVEIRA, V. M. de 245 $aA ribosomal RNA gene intergenic spacer based PCR and DGGE fingerprinting method for the analysis of specific rhizobial communities in soil.$h[electronic resource] 260 $c2006 520 $aA direct molecular method for assessing the diversity of specific populations of rhizobia in soil, based on nested PCR amplification of 16S-23S ribosomal RNA gene (rDNA) intergenic spacer (IGS) sequences, was developed. Initial generic amplification of bacterial rDNA IGS sequences from soil DNA was followed by specific amplification of (1) sequences affiliated with Rhizobium leguminosarum "sensu lato" and (2) R. tropici. Using analysis of the amplified sequences in clone libraries obtained on the basis of soil DNA, this two-sided method was shown to be very specific for rhizobial subpopulations in soil. It was then further validated as a direct fingerprinting tool of the target rhizobia based on denaturing gradient gel electrophoresis (DGGE). The PCR-DGGE approach was applied to soils from fields in Brazil cultivated with common bean (Phaseolus vulgaris) under conventional or no-tillage practices. The community fingerprints obtained allowed the direct analysis of the respective rhizobial community structures in soil samples from the two contrasting agricultural practices. Data obtained with both primer sets revealed clustering of the community structures of the target rhizobial types along treatment. Moreover, the DGGE profiles obtained with the R. tropici primer set indicated that the abundance and diversity of these organisms were favoured under NT practices. These results suggest that the R. leguminosarum-as well as R. tropici-targeted IGS-based nested PCR and DGGE are useful tools for monitoring the effect of agricultural practices on these and related rhizobial subpopulations in soils. 650 $aSoil management 653 $aCulture-independent analysis 653 $aDGGE 653 $aDiversity 653 $aRDNA spacer 653 $aRhizobia 700 1 $aMANFIO, G. P. 700 1 $aCOUTINHO, H. L. da C. 700 1 $aKEIJZER-WOLTERS, A. C. 700 1 $aELSAS, J. D. van 773 $tJournal of Microbiological Methods$gv. 64, n. 3, p. 366-379, Mar. 2006.
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