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Registro Completo |
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
04/05/1992 |
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Data da última atualização: |
04/05/1992 |
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Autoria: |
QUAGGIO, J. A.; MASCARENHAS, H. A. A.; BATAGLIA, O. C. |
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Título: |
Resposta da soja a aplicacao de doses crescentes de calcario em latossolo roxo distrofico de cerrado. II. Efeito residual. |
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Ano de publicação: |
1982 |
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Fonte/Imprenta: |
Revista Brasileira de Ciencia do Solo, v.6, n.2, p.113-118, 1982. |
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Idioma: |
Português |
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Conteúdo: |
O experimento foi conduzido durante tres anos em um Latossolo Roxo distrofico (originalmente sob vegetacao de cerrado), com a aplicacao de 0, 2, 4, 6, 8, 10 e 12 t/ha de calcario dolomitico. A calagem aumentou consideravelmente a producao de soja, sendo que as producoes mais elevadas foram obtidas em pH ao redor de 6,0 e/ou saturacao de bases de 60%. Nesse solo, o criterio do aluminio trocavel mostrou-se ineficiente para recomendar calagem para soja. Os teores foliares de fosforo e nitrogenio aumentaram proporcionalmente com as doses de calcario e os teores de manganes, tanto no solo como nas folhas, decresceram com a calagem e com o tempo. A causa dessa reducao com o tempo foi a neutralizacao da acides de camadas subsuperficiais do solo especialmente nasdoses mais elevadas de calcario, no terceiro ano. |
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Palavras-Chave: |
Latossolo Roxo Distrofico. |
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Thesagro: |
Adubação; Calagem; Calcário; Calcário Dolomítico; Cerrado; Manganês; Nitrogênio; Produção; Soja; Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01600naa a2200277 a 4500
001 1547155
005 1992-05-04
008 1982 bl uuuu u00u1 u #d
100 1 $aQUAGGIO, J. A.
245 $aResposta da soja a aplicacao de doses crescentes de calcario em latossolo roxo distrofico de cerrado. II. Efeito residual.
260 $c1982
520 $aO experimento foi conduzido durante tres anos em um Latossolo Roxo distrofico (originalmente sob vegetacao de cerrado), com a aplicacao de 0, 2, 4, 6, 8, 10 e 12 t/ha de calcario dolomitico. A calagem aumentou consideravelmente a producao de soja, sendo que as producoes mais elevadas foram obtidas em pH ao redor de 6,0 e/ou saturacao de bases de 60%. Nesse solo, o criterio do aluminio trocavel mostrou-se ineficiente para recomendar calagem para soja. Os teores foliares de fosforo e nitrogenio aumentaram proporcionalmente com as doses de calcario e os teores de manganes, tanto no solo como nas folhas, decresceram com a calagem e com o tempo. A causa dessa reducao com o tempo foi a neutralizacao da acides de camadas subsuperficiais do solo especialmente nasdoses mais elevadas de calcario, no terceiro ano.
650 $aAdubação
650 $aCalagem
650 $aCalcário
650 $aCalcário Dolomítico
650 $aCerrado
650 $aManganês
650 $aNitrogênio
650 $aProdução
650 $aSoja
650 $aSolo
653 $aLatossolo Roxo Distrofico
700 1 $aMASCARENHAS, H. A. A.
700 1 $aBATAGLIA, O. C.
773 $tRevista Brasileira de Ciencia do Solo$gv.6, n.2, p.113-118, 1982.
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Embrapa Cerrados (CPAC) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Mandioca e Fruticultura. Para informações adicionais entre em contato com cnpmf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
12/05/2020 |
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Data da última atualização: |
02/06/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
BRITO, F. S. D.; SANTOS, J. R. P.; AZEVEDO, V. C. R.; PEIXOUTO, Y. S.; OLIVEIRA, S. A. S. de; FERREIRA, C. F.; HADDAD, F.; AMORIM, E. P.; FRAAIJE, B.; MILLER, R. N. G. |
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Afiliação: |
FABIANE S. D. BRITO; JANSEN R. P. SANTOS; VÂNIA C. R. AZEVEDO; YSLAI S. PEIXOUTO; SAULO ALVES SANTOS DE OLIVEIRA, CNPMF; CLAUDIA FORTES FERREIRA, CNPMF; FERNANDO HADDAD, CNPMF; EDSON PERITO AMORIM, CNPMF; BART FRAAIJE; ROBERT N. G. MILLER. |
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Título: |
Genetic Diversity and Azole fungicide sensitivity in pseudocercospora musae field populations in Brazil. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Frontiers in Microbiology, v, 11, n.99, 2020. |
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ISSN: |
1664-302X |
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DOI: |
10.3389/fmicb.2020.00099 |
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Idioma: |
Inglês |
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Conteúdo: |
Pseudocercospora musae, causal agent of Sigatoka leaf spot, or yellow Sigatoka disease, is considered a major pathogen of banana (Musa spp.). Widely disseminated in Brazil, this study explored the genetic diversity in field populations of the pathogen from production areas in the Distrito Federal and the States of Bahia, Minas Gerais, and Rio Grande do Norte. Resistance to demethylation inhibitor (DMI) fungicides was also examined. For 162 isolates from 10 banana growing regions, analysis of mating type idiomorph frequency was conducted, together with estimation of genetic diversity at 15 microsatellite loci. A total of 149 haplotypes were identified across the examined populations, with an average genetic diversity of 4.06. In general, populations displayed 1:1 proportions of idiomorphs MAT1-1 and MAT1-2, providing evidence for sexual recombination. Multilocus linkage disequilibrium also indicated asexual reproduction contributing to the genetic structure of certain populations. AMOVA revealed that 86.3% of the genetic differentiation of the pathogen occurred among isolates within populations. Discriminant Analysis of Principal Components (DAPC) identified six most probable genetic groups, with no population structure associated with geographic origin or collection site. Although genetic similarity was observed among certain populations from different states, data revealed increasing genetic differentiation with increasing geographic distance, as validated by Mantel?s test (r = 0.19, P < 0.001). On the basis of DMI fungicide sensitivity testing and CYP51 gene sequence polymorphism, isolates from the Distrito Federal separated into two main groups, one with generally higher EC50 values against eight DMI fungicides. A clear phenotype-to-genotype relationship was observed for isolates carrying the CYP51 alteration Y461N. Conventionally adopted fungicides for control of Sigatoka leaf spot are likely to be overcome by combined sexual and asexual reproduction mechanisms in P. musae driving genetic variability. Continued analysis of pathogen genetic diversity and monitoring of DMI sensitivity profiles of Brazilian field populations is essential for the development of integrated control strategies based on host resistance breeding and rational design of fungicide regimes. MenosPseudocercospora musae, causal agent of Sigatoka leaf spot, or yellow Sigatoka disease, is considered a major pathogen of banana (Musa spp.). Widely disseminated in Brazil, this study explored the genetic diversity in field populations of the pathogen from production areas in the Distrito Federal and the States of Bahia, Minas Gerais, and Rio Grande do Norte. Resistance to demethylation inhibitor (DMI) fungicides was also examined. For 162 isolates from 10 banana growing regions, analysis of mating type idiomorph frequency was conducted, together with estimation of genetic diversity at 15 microsatellite loci. A total of 149 haplotypes were identified across the examined populations, with an average genetic diversity of 4.06. In general, populations displayed 1:1 proportions of idiomorphs MAT1-1 and MAT1-2, providing evidence for sexual recombination. Multilocus linkage disequilibrium also indicated asexual reproduction contributing to the genetic structure of certain populations. AMOVA revealed that 86.3% of the genetic differentiation of the pathogen occurred among isolates within populations. Discriminant Analysis of Principal Components (DAPC) identified six most probable genetic groups, with no population structure associated with geographic origin or collection site. Although genetic similarity was observed among certain populations from different states, data revealed increasing genetic differentiation with increasing geographic distance, as validated by Mantel?s test ... Mostrar Tudo |
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Thesagro: |
Banana; Sigatoka Negra. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03118naa a2200277 a 4500
001 2122242
005 2020-06-02
008 2020 bl uuuu u00u1 u #d
022 $a1664-302X
024 7 $a10.3389/fmicb.2020.00099$2DOI
100 1 $aBRITO, F. S. D.
245 $aGenetic Diversity and Azole fungicide sensitivity in pseudocercospora musae field populations in Brazil.$h[electronic resource]
260 $c2020
520 $aPseudocercospora musae, causal agent of Sigatoka leaf spot, or yellow Sigatoka disease, is considered a major pathogen of banana (Musa spp.). Widely disseminated in Brazil, this study explored the genetic diversity in field populations of the pathogen from production areas in the Distrito Federal and the States of Bahia, Minas Gerais, and Rio Grande do Norte. Resistance to demethylation inhibitor (DMI) fungicides was also examined. For 162 isolates from 10 banana growing regions, analysis of mating type idiomorph frequency was conducted, together with estimation of genetic diversity at 15 microsatellite loci. A total of 149 haplotypes were identified across the examined populations, with an average genetic diversity of 4.06. In general, populations displayed 1:1 proportions of idiomorphs MAT1-1 and MAT1-2, providing evidence for sexual recombination. Multilocus linkage disequilibrium also indicated asexual reproduction contributing to the genetic structure of certain populations. AMOVA revealed that 86.3% of the genetic differentiation of the pathogen occurred among isolates within populations. Discriminant Analysis of Principal Components (DAPC) identified six most probable genetic groups, with no population structure associated with geographic origin or collection site. Although genetic similarity was observed among certain populations from different states, data revealed increasing genetic differentiation with increasing geographic distance, as validated by Mantel?s test (r = 0.19, P < 0.001). On the basis of DMI fungicide sensitivity testing and CYP51 gene sequence polymorphism, isolates from the Distrito Federal separated into two main groups, one with generally higher EC50 values against eight DMI fungicides. A clear phenotype-to-genotype relationship was observed for isolates carrying the CYP51 alteration Y461N. Conventionally adopted fungicides for control of Sigatoka leaf spot are likely to be overcome by combined sexual and asexual reproduction mechanisms in P. musae driving genetic variability. Continued analysis of pathogen genetic diversity and monitoring of DMI sensitivity profiles of Brazilian field populations is essential for the development of integrated control strategies based on host resistance breeding and rational design of fungicide regimes.
650 $aBanana
650 $aSigatoka Negra
700 1 $aSANTOS, J. R. P.
700 1 $aAZEVEDO, V. C. R.
700 1 $aPEIXOUTO, Y. S.
700 1 $aOLIVEIRA, S. A. S. de
700 1 $aFERREIRA, C. F.
700 1 $aHADDAD, F.
700 1 $aAMORIM, E. P.
700 1 $aFRAAIJE, B.
700 1 $aMILLER, R. N. G.
773 $tFrontiers in Microbiology, v, 11$gn.99, 2020.
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