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| 7. |  | NASCIMENTO FILHO, M. B.; MAGALHÃES, J. G. R.; FERNANDES, J. C.; PEREIRA, A. R. Influência da altura de corte sobre a sobrevivência das touças de Eucalyptus. Silvicultura, São Paulo, v. 8, n. 28, p. 389-390, 1983. Edição dos anais do 4º Congresso Florestal Brasileiro, 1982, Belo Horizonte.| Biblioteca(s): Embrapa Florestas. |
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| 8. | | TOWNSEND, C. R.; MAGALHAES, J. A.; COSTA, N. de L.; PEREIRA, R. C. de A. Estabelecimento de Acacia angustissima, sob diferentes densidades, em pastagens de Bachiaria brizantha cv. Marandu. In: CONGRESSO BRASILEIRO EM SISTEMAS AGROFLORESTAIS, 2., 1998, Belem. Sistemas Agroflorestais no Contexto da Qualidade Ambiental e Competitividade: resumos expandidos. Belem: Embrapa-CPATU, 1998. p.221-223.| Biblioteca(s): Embrapa Florestas. |
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| 11. | | COSTA, N. de L.; OLIVEIRA, J. R. da C.; PAULINO, V. T.; LIMA, J. A. de S.; MAGALHÃES, J. A. Avaliação agronômica de leguminosas arbustivas de uso múltiplo dem Ariquemes, Rondônia. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p. 447-449| Biblioteca(s): Embrapa Florestas; Embrapa Meio-Norte. |
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| 12. | | RIBEIRO, E. P.; MAGALHÃES, J. L.; RODRIGUES, A. A.; RODRIGUES, D. A.; FRAZÃO, M. A.; RODRIGUES, C. L. Análise inicial do super clone de eucalipto adubado com lodo de efluente suíno. Pesquisa Florestal Brasileira, Colombo, v. 35, n. 84, p. 399-407, out./dez. 2015.| Biblioteca(s): Embrapa Florestas. |
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| 16. | | COSTA, N. de L.; MAGALHÃES, J. A.; TONWSEND, C. R.; PEREIRA, R. G. de A.; OLIVEIRA, J. R. da C. Seleção de leguminosas forrageiras para utilização em pastagens e sistemas silvipastoris em Rondônia. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p. 444-446 (Embrapa Florestas. Documentos, 98).| Biblioteca(s): Embrapa Florestas; Embrapa Meio-Norte. |
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| 17. | | COSTA, N. de L.; MAGALHÃES, J. A.; TONWSEND, C. R.; PEREIRA, R. G. de; OLIVEIRA, J. R. da C. Produção e qualidade da forragem de Brachiaria brizantha cv. Marandu em um sistema silvipastoril. In: CONGRESSO BRASILEIRO DE SISTEMAS AGROFLORESTAIS, 5., 2004, Curitiba. SAFs: desenvolvimento com proteção ambiental: anais. Colombo: Embrapa Florestas, 2004. p. 119-121 (Embrapa Florestas. Documentos, 98).| Biblioteca(s): Embrapa Florestas; Embrapa Meio-Norte. |
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| 18. | | GUIMARÃES, D. P.; MOURA, V. P. G.; REZENDE, G. C.; MENDES, C. J.; MAGALHÃES, J. G. R.; ASSIS, T. F. de; ALMEIDA, M. R. de; RESENDE, M. E. A. de; SILVA, F. V. da. Avaliação silvicultural, dendrométrica e tecnológica de espécies de Eucalyptus. Planaltina, DF: EMBRAPA-CPAC, 1983. 73 p. (EMBRAPA-CPAC. Boletim de Pesquisa, 20).| Biblioteca(s): Embrapa Amapá; Embrapa Amazônia Ocidental; Embrapa Cerrados; Embrapa Florestas; Embrapa Meio-Norte; Embrapa Rondônia; Embrapa Semiárido; Embrapa Unidades Centrais. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Milho e Sorgo. Para informações adicionais entre em contato com cnpms.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Milho e Sorgo. |
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Data corrente: |
11/09/2002 |
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Data da última atualização: |
19/11/2015 |
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Autoria: |
MAGALHAES, J. V. |
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Afiliação: |
JURANDIR VIEIRA DE MAGALHAES, CNPMS. |
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Título: |
Molecular genetic and physiological investigations of aluminum tolerance in sorghum (Sorghum bicolor L Moench). |
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Ano de publicação: |
2002 |
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Fonte/Imprenta: |
2002. |
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Páginas: |
192 p. |
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Idioma: |
Inglês |
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Notas: |
Tese (Doutorado)- Cornell University, Ithaca. |
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Conteúdo: |
Aluminum (Al) toxicity is one of the major constraints for agriculture on acid soils, which occupy large regions of the word´s agricultural area. At the low pH values associated with these soils (pH 4 -5). Al+3 is solubilized into the soil solution and is toxic to plants, dramatically inhibiting root growth and crop yield. Plant breeding approaches have been used to develop Al tolerant crop genotypes for over 50 years. In order to further improve crop Al tolerance, researchers are now investigating the molecular and physiological mechanisms underlying crop Al tolerance, with the ultimate goal of isolating major Al tolerance genes. Sorghum is an important cereal crop species that exhibits extraordinary levels of tolerance to abiotic stresses such as Al toxicity and drought. Yet, almost nothing is known about the genetics and physiology of sorghum Al tolerance, hence this was the focus of the thesis research described here. A detailed molecular genetic characterization of the mechanisms of Al tolerance in sorghum was conducted in two sources of sorghum Al tolerance, SC283 and SC566. SC283 was found to harbor a single major Al tolerance gene (Alt sb), which exhibited partial dominance in this study. Alt sb was subsequently mapped to a chromosomal location that was apparently not conserved in relation to the location of known Al tolerance genes in wheat and barley. Additional studies indicated that Al tolerance in SC566 is also controlled by the Alt sb gene. The results are discussed with regards to the possible conservation of Al tolerance genes across species in the Poaceae. The physiological studies of Al tolerance were performed with Al tolerant (ATF10B) and sensitive (ATF8B) near isogenic lines derived from SC283. These studies suggested that Alt sb encodes a tolerance mechanism that acts by excluding Al from sensitive sites in the root tip via and Al-activated root citrate exudation. Al tolerance in ATF10B appears to be inducible by Al, in that Al tolerance increased as the roots were exposed to Al for longer time periods. The thesis is concluded with a description of future research that will focus on the isolation of Alt sb by positional cloning. MenosAluminum (Al) toxicity is one of the major constraints for agriculture on acid soils, which occupy large regions of the word´s agricultural area. At the low pH values associated with these soils (pH 4 -5). Al+3 is solubilized into the soil solution and is toxic to plants, dramatically inhibiting root growth and crop yield. Plant breeding approaches have been used to develop Al tolerant crop genotypes for over 50 years. In order to further improve crop Al tolerance, researchers are now investigating the molecular and physiological mechanisms underlying crop Al tolerance, with the ultimate goal of isolating major Al tolerance genes. Sorghum is an important cereal crop species that exhibits extraordinary levels of tolerance to abiotic stresses such as Al toxicity and drought. Yet, almost nothing is known about the genetics and physiology of sorghum Al tolerance, hence this was the focus of the thesis research described here. A detailed molecular genetic characterization of the mechanisms of Al tolerance in sorghum was conducted in two sources of sorghum Al tolerance, SC283 and SC566. SC283 was found to harbor a single major Al tolerance gene (Alt sb), which exhibited partial dominance in this study. Alt sb was subsequently mapped to a chromosomal location that was apparently not conserved in relation to the location of known Al tolerance genes in wheat and barley. Additional studies indicated that Al tolerance in SC566 is also controlled by the Alt sb gene. The results are disc... Mostrar Tudo |
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Thesagro: |
Genética Molecular. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02639nam a2200145 a 4500
001 1485816
005 2015-11-19
008 2002 bl uuuu m 00u1 u #d
100 1 $aMAGALHAES, J. V.
245 $aMolecular genetic and physiological investigations of aluminum tolerance in sorghum (Sorghum bicolor L Moench).
260 $a2002.$c2002
300 $a192 p.
500 $aTese (Doutorado)- Cornell University, Ithaca.
520 $aAluminum (Al) toxicity is one of the major constraints for agriculture on acid soils, which occupy large regions of the word´s agricultural area. At the low pH values associated with these soils (pH 4 -5). Al+3 is solubilized into the soil solution and is toxic to plants, dramatically inhibiting root growth and crop yield. Plant breeding approaches have been used to develop Al tolerant crop genotypes for over 50 years. In order to further improve crop Al tolerance, researchers are now investigating the molecular and physiological mechanisms underlying crop Al tolerance, with the ultimate goal of isolating major Al tolerance genes. Sorghum is an important cereal crop species that exhibits extraordinary levels of tolerance to abiotic stresses such as Al toxicity and drought. Yet, almost nothing is known about the genetics and physiology of sorghum Al tolerance, hence this was the focus of the thesis research described here. A detailed molecular genetic characterization of the mechanisms of Al tolerance in sorghum was conducted in two sources of sorghum Al tolerance, SC283 and SC566. SC283 was found to harbor a single major Al tolerance gene (Alt sb), which exhibited partial dominance in this study. Alt sb was subsequently mapped to a chromosomal location that was apparently not conserved in relation to the location of known Al tolerance genes in wheat and barley. Additional studies indicated that Al tolerance in SC566 is also controlled by the Alt sb gene. The results are discussed with regards to the possible conservation of Al tolerance genes across species in the Poaceae. The physiological studies of Al tolerance were performed with Al tolerant (ATF10B) and sensitive (ATF8B) near isogenic lines derived from SC283. These studies suggested that Alt sb encodes a tolerance mechanism that acts by excluding Al from sensitive sites in the root tip via and Al-activated root citrate exudation. Al tolerance in ATF10B appears to be inducible by Al, in that Al tolerance increased as the roots were exposed to Al for longer time periods. The thesis is concluded with a description of future research that will focus on the isolation of Alt sb by positional cloning.
650 $aGenética Molecular
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