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Registro Completo |
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Biblioteca(s): |
Embrapa Soja. |
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Data corrente: |
03/10/2014 |
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Data da última atualização: |
05/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
BABUJIA, L. C.; SILVA, A. P.; NOGUEIRA, M. A.; HUNGRIA, M. |
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Afiliação: |
LETÍCIA CARLOS BABUJIA, UEM; ADRIANA PEREIRA SILVA; MARCO ANTONIO NOGUEIRA, CNPSO; MARIANGELA HUNGRIA DA CUNHA, CNPSO. |
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Título: |
Microbial diversity in an Oxisol under no-tillage and conventional tillage in southern Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Revista Ciência Agronômica, Fortaleza, v. 45, n. 5, esp., p. 863-870, 2014. |
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ISSN: |
1806-6690 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: The no-tillage (NT) system of soil management is recognized as more sustainable than conventional tillage (CT), with an important role played by soil microorganisms. The objective of this study was to estimate differences in soil microbial diversity under NT and CT at different soil depths. For that, bacterial (16S rDNA) and fungal (18S rDNA) communities were evaluated by denaturing gradient gel electrophoresis (DGGE) in a 20-year field experiment established on an Oxisol in southern Brazil on which soybean has been grown in the summer and wheat in the winter. Soil samples were collected at the depths of 0-5, 5-10, 10-20 and 20-30 cm, and submitted to DGGE analyses. The results revealed lower similarity (28%) between bacterial communities in the NT and the CT systems at the 0-5 cm layer. The Shannon index (H) confirmed higher bacterial diversity with NT at all depths, when compared to CT. In relation to fungal communities, higher diversity was detected with CT, especially at the 0?5-cm depth. The results indicate that fungal communities can be more tolerant to environmental stresses related to soil disturbance than bacteria. More emphasis should be given for understanding processes affecting the diversity of microorganisms in agricultural soils, with particular emphasis on tillage systems. RESUMO: O sistema de plantio direto (PD) é reconhecido como mais sustentável que o plantio convencional (PC), desempenhando um importante papel na atividade dos microrganismos do solo. O objetivo deste estudo foi estimar diferenças na diversidade microbiana do solo sob PD e PC, em diferentes profundidades. Para isso, foram avaliadas as comunidades bacteriana (16S rDNA) e fúngica (18S rDNA) através da eletroforese em gel com gradiente desnaturante (DGGE), em um experimento de campo estabelecido há 20 anos em um Latossolo Vermelho no sul do Brasil, com a soja cultivada no verão e trigo no inverno. As amostras de solo foram coletadas nas profundidades de 0-5; 5-10; 10-20 e 20-30 cm, e foram submetidas a análises de DGGE. Os resultados revelaram baixa similaridade (28%) na profundidade de 0-5 cm para as comunidades bacterianas entre o sistema de PD e PC. O índice de Shannon (H) confirmou diversidade bacteriana superior no PD em todas as profundidades, quando comparado ao PC. Em relação às comunidades fúngicas, a maior diversidade foi detectada no sistema de PC, especialmente na profundidade de 0-5 cm. Os resultados indicam que as comunidades fúngicas podem ser mais tolerantes a estresses ambientais relacionados com a perturbação do solo que as bactérias. Maior ênfase deve ser dada para compreender os processos que afetam a diversidade dos microrganismos em solos agrícolas, com particular destaque para os sistemas de preparo do solo. MenosABSTRACT: The no-tillage (NT) system of soil management is recognized as more sustainable than conventional tillage (CT), with an important role played by soil microorganisms. The objective of this study was to estimate differences in soil microbial diversity under NT and CT at different soil depths. For that, bacterial (16S rDNA) and fungal (18S rDNA) communities were evaluated by denaturing gradient gel electrophoresis (DGGE) in a 20-year field experiment established on an Oxisol in southern Brazil on which soybean has been grown in the summer and wheat in the winter. Soil samples were collected at the depths of 0-5, 5-10, 10-20 and 20-30 cm, and submitted to DGGE analyses. The results revealed lower similarity (28%) between bacterial communities in the NT and the CT systems at the 0-5 cm layer. The Shannon index (H) confirmed higher bacterial diversity with NT at all depths, when compared to CT. In relation to fungal communities, higher diversity was detected with CT, especially at the 0?5-cm depth. The results indicate that fungal communities can be more tolerant to environmental stresses related to soil disturbance than bacteria. More emphasis should be given for understanding processes affecting the diversity of microorganisms in agricultural soils, with particular emphasis on tillage systems. RESUMO: O sistema de plantio direto (PD) é reconhecido como mais sustentável que o plantio convencional (PC), desempenhando um importante papel na atividade dos microrganismos do... Mostrar Tudo |
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Palavras-Chave: |
Bacterial diversity; Fungal diversity; Microbial. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/109545/1/3439-17978-1-PB.pdf
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Marc: |
LEADER 03421naa a2200205 a 4500
001 1996519
005 2022-04-05
008 2014 bl uuuu u00u1 u #d
022 $a1806-6690
100 1 $aBABUJIA, L. C.
245 $aMicrobial diversity in an Oxisol under no-tillage and conventional tillage in southern Brazil.$h[electronic resource]
260 $c2014
520 $aABSTRACT: The no-tillage (NT) system of soil management is recognized as more sustainable than conventional tillage (CT), with an important role played by soil microorganisms. The objective of this study was to estimate differences in soil microbial diversity under NT and CT at different soil depths. For that, bacterial (16S rDNA) and fungal (18S rDNA) communities were evaluated by denaturing gradient gel electrophoresis (DGGE) in a 20-year field experiment established on an Oxisol in southern Brazil on which soybean has been grown in the summer and wheat in the winter. Soil samples were collected at the depths of 0-5, 5-10, 10-20 and 20-30 cm, and submitted to DGGE analyses. The results revealed lower similarity (28%) between bacterial communities in the NT and the CT systems at the 0-5 cm layer. The Shannon index (H) confirmed higher bacterial diversity with NT at all depths, when compared to CT. In relation to fungal communities, higher diversity was detected with CT, especially at the 0?5-cm depth. The results indicate that fungal communities can be more tolerant to environmental stresses related to soil disturbance than bacteria. More emphasis should be given for understanding processes affecting the diversity of microorganisms in agricultural soils, with particular emphasis on tillage systems. RESUMO: O sistema de plantio direto (PD) é reconhecido como mais sustentável que o plantio convencional (PC), desempenhando um importante papel na atividade dos microrganismos do solo. O objetivo deste estudo foi estimar diferenças na diversidade microbiana do solo sob PD e PC, em diferentes profundidades. Para isso, foram avaliadas as comunidades bacteriana (16S rDNA) e fúngica (18S rDNA) através da eletroforese em gel com gradiente desnaturante (DGGE), em um experimento de campo estabelecido há 20 anos em um Latossolo Vermelho no sul do Brasil, com a soja cultivada no verão e trigo no inverno. As amostras de solo foram coletadas nas profundidades de 0-5; 5-10; 10-20 e 20-30 cm, e foram submetidas a análises de DGGE. Os resultados revelaram baixa similaridade (28%) na profundidade de 0-5 cm para as comunidades bacterianas entre o sistema de PD e PC. O índice de Shannon (H) confirmou diversidade bacteriana superior no PD em todas as profundidades, quando comparado ao PC. Em relação às comunidades fúngicas, a maior diversidade foi detectada no sistema de PC, especialmente na profundidade de 0-5 cm. Os resultados indicam que as comunidades fúngicas podem ser mais tolerantes a estresses ambientais relacionados com a perturbação do solo que as bactérias. Maior ênfase deve ser dada para compreender os processos que afetam a diversidade dos microrganismos em solos agrícolas, com particular destaque para os sistemas de preparo do solo.
653 $aBacterial diversity
653 $aFungal diversity
653 $aMicrobial
700 1 $aSILVA, A. P.
700 1 $aNOGUEIRA, M. A.
700 1 $aHUNGRIA, M.
773 $tRevista Ciência Agronômica, Fortaleza$gv. 45, n. 5, esp., p. 863-870, 2014.
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Registro original: |
Embrapa Soja (CNPSO) |
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Biblioteca(s): |
Embrapa Territorial. |
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Data corrente: |
28/08/2017 |
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Data da última atualização: |
09/10/2017 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
MENEZES, I. P. P. DE; HOFFMANN, L. V.; SILVA, A. R. DA; BARROSO, P. A. V. |
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Afiliação: |
IVANDILSON PESSOA PINTO DE MENEZES, INSTITUTO FEDERAL GOIANO; LUCIA VIEIRA HOFFMANN, CNPA; A. R. DA SILVA, UNIVERSIDADE FEDERAL RURAL DE PERNAMBUCO; PAULO AUGUSTO VIANNA BARROSO, CNPM. |
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Título: |
Genetic diversity of arboreal cotton populations of the Brazilian semiarid: a remnant primary gene pool for cotton cultivars. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Genetics and Molecular Research, v. 16, n. 3, p. 1-13, 2017. |
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DOI: |
http://dx.doi.org/10.4238/gmr16039659 |
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Idioma: |
Inglês |
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Conteúdo: |
Mocó cotton belong to the same species as the cultivated species, Gossypium hirsutum, and cultivated forms were mainly landraces but also developed as cultivars, bearing good fiber quality and drought tolerant when cropped as a perennial species. The northeast Brazil crop system based on this cotton type is finished, with a few small area planted in the three main States, where it was previously cultivated (Ceará, Paraíba, and Rio Grande do Norte), but in others, maintenance is accomplished by single dooryard plants. Plants were found in all visited Northeast Brazil municipalities, sometimes in the North of the country, and were collected for ex situ preservation and evaluation. Most of seeds had no fuzz (62.2%) and 94.6% of the genotypes presented spot in flowers. Seventy-one alleles were revealed in 12 loci. The genetic structure of the population evaluated by microsatellite markers shows two main groups, one comprising the Seridó region where landraces were originated and other comprising the state of Ceará, where a specific breeding program was developed. Genotypes collected in North Brazil States as well as those collected in Bahia, Alagoas, and Sergipe grouped with those collected in Ceará. The Mantel correlogram indicates a significant (P < 0.05) correlation between genetic and geographical distances up to 77 km. The ex situ maintenance and agronomical evaluation are the main concerns for mocó, as the use of the agricultural interesting traits, possibly introgressed to other genotypes, is predicted. The in situ preservation is still of interest since there is more diversity there than in the collected plants and some should be continued due to use as medicinal plant. MenosMocó cotton belong to the same species as the cultivated species, Gossypium hirsutum, and cultivated forms were mainly landraces but also developed as cultivars, bearing good fiber quality and drought tolerant when cropped as a perennial species. The northeast Brazil crop system based on this cotton type is finished, with a few small area planted in the three main States, where it was previously cultivated (Ceará, Paraíba, and Rio Grande do Norte), but in others, maintenance is accomplished by single dooryard plants. Plants were found in all visited Northeast Brazil municipalities, sometimes in the North of the country, and were collected for ex situ preservation and evaluation. Most of seeds had no fuzz (62.2%) and 94.6% of the genotypes presented spot in flowers. Seventy-one alleles were revealed in 12 loci. The genetic structure of the population evaluated by microsatellite markers shows two main groups, one comprising the Seridó region where landraces were originated and other comprising the state of Ceará, where a specific breeding program was developed. Genotypes collected in North Brazil States as well as those collected in Bahia, Alagoas, and Sergipe grouped with those collected in Ceará. The Mantel correlogram indicates a significant (P < 0.05) correlation between genetic and geographical distances up to 77 km. The ex situ maintenance and agronomical evaluation are the main concerns for mocó, as the use of the agricultural interesting traits, possibly introgressed t... Mostrar Tudo |
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Palavras-Chave: |
Genetic diversity; Genetic structure; Microsatellite markers; Mocó cotton. |
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Thesaurus NAL: |
Germplasm conservation. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/164845/1/4840.pdf
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Marc: |
LEADER 02482naa a2200229 a 4500
001 2074553
005 2017-10-09
008 2017 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.4238/gmr16039659$2DOI
100 1 $aMENEZES, I. P. P. DE
245 $aGenetic diversity of arboreal cotton populations of the Brazilian semiarid$ba remnant primary gene pool for cotton cultivars.$h[electronic resource]
260 $c2017
520 $aMocó cotton belong to the same species as the cultivated species, Gossypium hirsutum, and cultivated forms were mainly landraces but also developed as cultivars, bearing good fiber quality and drought tolerant when cropped as a perennial species. The northeast Brazil crop system based on this cotton type is finished, with a few small area planted in the three main States, where it was previously cultivated (Ceará, Paraíba, and Rio Grande do Norte), but in others, maintenance is accomplished by single dooryard plants. Plants were found in all visited Northeast Brazil municipalities, sometimes in the North of the country, and were collected for ex situ preservation and evaluation. Most of seeds had no fuzz (62.2%) and 94.6% of the genotypes presented spot in flowers. Seventy-one alleles were revealed in 12 loci. The genetic structure of the population evaluated by microsatellite markers shows two main groups, one comprising the Seridó region where landraces were originated and other comprising the state of Ceará, where a specific breeding program was developed. Genotypes collected in North Brazil States as well as those collected in Bahia, Alagoas, and Sergipe grouped with those collected in Ceará. The Mantel correlogram indicates a significant (P < 0.05) correlation between genetic and geographical distances up to 77 km. The ex situ maintenance and agronomical evaluation are the main concerns for mocó, as the use of the agricultural interesting traits, possibly introgressed to other genotypes, is predicted. The in situ preservation is still of interest since there is more diversity there than in the collected plants and some should be continued due to use as medicinal plant.
650 $aGermplasm conservation
653 $aGenetic diversity
653 $aGenetic structure
653 $aMicrosatellite markers
653 $aMocó cotton
700 1 $aHOFFMANN, L. V.
700 1 $aSILVA, A. R. DA
700 1 $aBARROSO, P. A. V.
773 $tGenetics and Molecular Research$gv. 16, n. 3, p. 1-13, 2017.
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