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Registro Completo |
Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Cerrados. |
Data corrente: |
15/09/2010 |
Data da última atualização: |
15/09/2010 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
PEIXOTO, R. S.; CHAER, G. M.; FRANCO, N.; REIS JUNIOR, F. B. dos; MENDES, I. de C.; ROSADO, A. S. |
Afiliação: |
RAQUEL. S. PEIXOTO, UFRJ; GUILHERME MONTANDON CHAER, CNPAB; N. FRANCO, UFRJ; FABIO BUENO DOS REIS JUNIOR, CPAC; IEDA DE CARVALHO MENDES, CPAC; A. S. ROSADO, UFRJ. |
Título: |
A decade of land use contributes to changes in the chemistry, biochemistry and bacterial community structures of soils in the Cerrado. |
Ano de publicação: |
2010 |
Fonte/Imprenta: |
Antonie van Leeuwenhoek, v. 98, n. 3, p. 403-413, 2010. |
Idioma: |
Inglês |
Conteúdo: |
The bacterial community structures (BCSs) of Cerrado soils cultivated under conventional tillage (CT), no-tillage (NT) and under native Cerrado (NC) vegetation were evaluated using PCR/DGGE of bacterial 16S rRNA (rrs) and rpoB genes and of Pseudomonas group genes. Soil chemical analysis, microbial biomass and the enzyme activities were also evaluated and correlated with the BCS measurements. The multivariate ordinations of DGGE profiles showed differences between the BCS of the NC area and those from cultivated areas. The BCSs of the CT and NT areas also differed in all DGGE fingerprints, including changes in the profile of Pseudomonas populations, indicating that agricultural systems can also be responsible for changes within specific microbial niches, although the clearest differences were found in the rpoB profiles. The MRPP analysis demonstrated significant differences between the BCSs from different soil layers of NT areas based on all gene fingerprints and those of NC areas based on bacterial 16S rRNA and rpoB genes fingerprints. No differences were observed in the microbial fingerprints of CT samples from different depths, indicating that ploughing affected the original BCS stratification. The BCS from NC areas, based on all gene fingerprints, could be related to higher levels of soil acidity and higher amounts of MBC and of phosphatase activity. In contrast, the BCSs from cultivated areas were related to higher levels of Ca + Mg, P and K, likely as a result of a history of chemical fertilisation in these areas. The relationships between rpoB and Pseudomonas BCSs and all chemical and biochemical properties of soils were significant, according to a Mantel test (P < 0.05), indicating that the different changes in soil properties induced by soil use or management may drive the formation of the soil BCS. MenosThe bacterial community structures (BCSs) of Cerrado soils cultivated under conventional tillage (CT), no-tillage (NT) and under native Cerrado (NC) vegetation were evaluated using PCR/DGGE of bacterial 16S rRNA (rrs) and rpoB genes and of Pseudomonas group genes. Soil chemical analysis, microbial biomass and the enzyme activities were also evaluated and correlated with the BCS measurements. The multivariate ordinations of DGGE profiles showed differences between the BCS of the NC area and those from cultivated areas. The BCSs of the CT and NT areas also differed in all DGGE fingerprints, including changes in the profile of Pseudomonas populations, indicating that agricultural systems can also be responsible for changes within specific microbial niches, although the clearest differences were found in the rpoB profiles. The MRPP analysis demonstrated significant differences between the BCSs from different soil layers of NT areas based on all gene fingerprints and those of NC areas based on bacterial 16S rRNA and rpoB genes fingerprints. No differences were observed in the microbial fingerprints of CT samples from different depths, indicating that ploughing affected the original BCS stratification. The BCS from NC areas, based on all gene fingerprints, could be related to higher levels of soil acidity and higher amounts of MBC and of phosphatase activity. In contrast, the BCSs from cultivated areas were related to higher levels of Ca + Mg, P and K, likely as a result of a hist... Mostrar Tudo |
Thesagro: |
Bactéria; Cerrado; Plantio; Solo; Uso da Terra. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02536naa a2200241 a 4500 001 1862292 005 2010-09-15 008 2010 bl --- 0-- u #d 100 1 $aPEIXOTO, R. S. 245 $aA decade of land use contributes to changes in the chemistry, biochemistry and bacterial community structures of soils in the Cerrado. 260 $c2010 520 $aThe bacterial community structures (BCSs) of Cerrado soils cultivated under conventional tillage (CT), no-tillage (NT) and under native Cerrado (NC) vegetation were evaluated using PCR/DGGE of bacterial 16S rRNA (rrs) and rpoB genes and of Pseudomonas group genes. Soil chemical analysis, microbial biomass and the enzyme activities were also evaluated and correlated with the BCS measurements. The multivariate ordinations of DGGE profiles showed differences between the BCS of the NC area and those from cultivated areas. The BCSs of the CT and NT areas also differed in all DGGE fingerprints, including changes in the profile of Pseudomonas populations, indicating that agricultural systems can also be responsible for changes within specific microbial niches, although the clearest differences were found in the rpoB profiles. The MRPP analysis demonstrated significant differences between the BCSs from different soil layers of NT areas based on all gene fingerprints and those of NC areas based on bacterial 16S rRNA and rpoB genes fingerprints. No differences were observed in the microbial fingerprints of CT samples from different depths, indicating that ploughing affected the original BCS stratification. The BCS from NC areas, based on all gene fingerprints, could be related to higher levels of soil acidity and higher amounts of MBC and of phosphatase activity. In contrast, the BCSs from cultivated areas were related to higher levels of Ca + Mg, P and K, likely as a result of a history of chemical fertilisation in these areas. The relationships between rpoB and Pseudomonas BCSs and all chemical and biochemical properties of soils were significant, according to a Mantel test (P < 0.05), indicating that the different changes in soil properties induced by soil use or management may drive the formation of the soil BCS. 650 $aBactéria 650 $aCerrado 650 $aPlantio 650 $aSolo 650 $aUso da Terra 700 1 $aCHAER, G. M. 700 1 $aFRANCO, N. 700 1 $aREIS JUNIOR, F. B. dos 700 1 $aMENDES, I. de C. 700 1 $aROSADO, A. S. 773 $tAntonie van Leeuwenhoek$gv. 98, n. 3, p. 403-413, 2010.
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Registro original: |
Embrapa Cerrados (CPAC) |
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
Data corrente: |
24/08/2000 |
Data da última atualização: |
16/03/2021 |
Autoria: |
SILVA, A. de B. |
Afiliação: |
ANTONIO DE BRITO SILVA, CPATU. |
Título: |
Situação atual das pesquisas no CPATU/EMBRAPA sobre a cigarrinha das pastagens Deois incompleta Walker. |
Ano de publicação: |
1980 |
Fonte/Imprenta: |
Belém, PA: EMBRAPA-CPATU, 1980. |
Páginas: |
12 p. |
Idioma: |
Português |
Notas: |
Trabalho apresentado na Reunião sobre Cigarrinha de Pastagens, 1980, Brasilia. Publicação não convencional. Mimeografado. |
Palavras-Chave: |
Brasil; CPATU; Pará. |
Thesagro: |
Cigarrinha das Pastagens; Flutuação Populacional; Hospedeiro; Inimigo Natural; Instituição de Pesquisa. |
Thesaurus NAL: |
Amazonia; hosts; natural enemies; population dynamics; research institutions. |
Categoria do assunto: |
-- |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/216328/1/Situacao-atual-das-pesquisas.pdf
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Marc: |
LEADER 00891nam a2200277 a 4500 001 1383453 005 2021-03-16 008 1980 bl uuuu u0uu1 u #d 100 1 $aSILVA, A. de B. 245 $aSituação atual das pesquisas no CPATU/EMBRAPA sobre a cigarrinha das pastagens Deois incompleta Walker. 260 $aBelém, PA: EMBRAPA-CPATU$c1980 300 $a12 p. 500 $aTrabalho apresentado na Reunião sobre Cigarrinha de Pastagens, 1980, Brasilia. Publicação não convencional. Mimeografado. 650 $aAmazonia 650 $ahosts 650 $anatural enemies 650 $apopulation dynamics 650 $aresearch institutions 650 $aCigarrinha das Pastagens 650 $aFlutuação Populacional 650 $aHospedeiro 650 $aInimigo Natural 650 $aInstituição de Pesquisa 653 $aBrasil 653 $aCPATU 653 $aPará
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