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Registro Completo |
Biblioteca(s): |
Embrapa Unidades Centrais. |
Data corrente: |
27/02/2002 |
Data da última atualização: |
27/02/2002 |
Autoria: |
PONTES, O. F. S.; ESPINDOLA, E. S.; CAVAGNOLLO, E. M.; SUDO, S. |
Título: |
Desenvolvimento de Nova Cultivar de Fumo 'Comum' Resistente ao Vírus do Mosaico no Brasil. |
Ano de publicação: |
1990 |
Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, V. 25, n.8, p. 1157-1163, ago.1990 |
Idioma: |
Português |
Conteúdo: |
A cultivar CSC 300 é a mais recente variedade de fumo tipo "comum" disponível para plantio em áreas infestadas pelo TMV (Vírus do Mosaico do Fumo). A nova cultivar, imune ao TMV, foi obtida pelo método do retrocruzamento, utilizando-se, inicialmente, as cultivares CO-D (Palotina) como pai recorrente, e duas cultivares de fumo Burley (Ky- 14 e Ky- 12) como doadoras dos genes "NN", responsáveis pelo caráter imunidade (hipersensibilidade das células infectadas). A nova cultivar foi superior à comercial tanto em produtividade quanto em qualidade das folhas curadas, possuindo características fenotípicas bastante semelharítes à cultivar CO-D. Os testes envolvendo painéis de fumaça foram muito bons alcançando grande concordância com os padrões organolépticos esperados dentro do tipo de fumo "Galpão Comum". Esta nova cultivar foi entregue aos produtores de fumo para plantio já na safra-87, através do "Centro de Pesquisas e Melhoramento Genético do Funio" da Souza Cruz.
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Palavras-Chave: |
Nicodana tabacun4 TM V; tipo comum. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01554naa a2200181 a 4500 001 1106505 005 2002-02-27 008 1990 bl uuuu u00u1 u #d 100 1 $aPONTES, O. F. S. 245 $aDesenvolvimento de Nova Cultivar de Fumo 'Comum' Resistente ao Vírus do Mosaico no Brasil. 260 $c1990 520 $aA cultivar CSC 300 é a mais recente variedade de fumo tipo "comum" disponível para plantio em áreas infestadas pelo TMV (Vírus do Mosaico do Fumo). A nova cultivar, imune ao TMV, foi obtida pelo método do retrocruzamento, utilizando-se, inicialmente, as cultivares CO-D (Palotina) como pai recorrente, e duas cultivares de fumo Burley (Ky- 14 e Ky- 12) como doadoras dos genes "NN", responsáveis pelo caráter imunidade (hipersensibilidade das células infectadas). A nova cultivar foi superior à comercial tanto em produtividade quanto em qualidade das folhas curadas, possuindo características fenotípicas bastante semelharítes à cultivar CO-D. Os testes envolvendo painéis de fumaça foram muito bons alcançando grande concordância com os padrões organolépticos esperados dentro do tipo de fumo "Galpão Comum". Esta nova cultivar foi entregue aos produtores de fumo para plantio já na safra-87, através do "Centro de Pesquisas e Melhoramento Genético do Funio" da Souza Cruz. 653 $aNicodana tabacun4 TM V 653 $atipo comum 700 1 $aESPINDOLA, E. S. 700 1 $aCAVAGNOLLO, E. M. 700 1 $aSUDO, S. 773 $tPesquisa Agropecuária Brasileira, Brasília, V. 25$gn.8, p. 1157-1163, ago.1990
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Registro Completo
Biblioteca(s): |
Embrapa Agrobiologia. |
Data corrente: |
15/10/2003 |
Data da última atualização: |
15/10/2003 |
Autoria: |
SIQUEIRA, J. O.; SAGGIN JÚNIOR, O. J. |
Título: |
Dependency on arbuscular mycorrhizal fungi and responsiveness of some Brazilian native woody species. |
Ano de publicação: |
2001 |
Fonte/Imprenta: |
Mycorrhiza, New York, v. 11, p. 245-255, 2001. |
Idioma: |
Inglês |
Conteúdo: |
Arbuscular mycorrhiza (AM) associations are of great importance in forest ecology and land rehabilitation in the tropics, but information on AM susceptibility, host dependence, and host responsiveness to the fungi is scarce. The present study was carried out under greenhouse conditions in a low-fertility soil with 29 woody species. There were very large differences between plant species in AM colonization, responsiveness to inoculation, mycorrhizal dependency and efficiency of phosphorus (P) uptake. All of these parameters were influenced by available soil p in solution. AM colonization ranged from zero in several non-mycotrophic species to >60% in the highly mycotrophic ones. Ten species (34% of the total) were found to be mycorrhiza- independent or non-mycotrophic, whereas the rest were highly to very highly dependent. The level of p above which there was no AM effect, defined here as the T' value, allowed distinction between AM dependence and responsiveness of the host and was very efficient for separating species according to these traits. Mycorrhizal responsiveness and dependency were not related and some species were responsive to increased p in the soil solution only when mycorrhizal. Efficiency of p uptake was affected by AM and by p levels. Some species exhibited a high efficiency independent of AM, while others were very inefficient even at high P. Despite differences between species, in most cases AM growth enhancement was nutritionally mediated. Differences in AM responsiveness and dependency as well as the importance of these concepts for reforestation technology in the tropics are discussed. MenosArbuscular mycorrhiza (AM) associations are of great importance in forest ecology and land rehabilitation in the tropics, but information on AM susceptibility, host dependence, and host responsiveness to the fungi is scarce. The present study was carried out under greenhouse conditions in a low-fertility soil with 29 woody species. There were very large differences between plant species in AM colonization, responsiveness to inoculation, mycorrhizal dependency and efficiency of phosphorus (P) uptake. All of these parameters were influenced by available soil p in solution. AM colonization ranged from zero in several non-mycotrophic species to >60% in the highly mycotrophic ones. Ten species (34% of the total) were found to be mycorrhiza- independent or non-mycotrophic, whereas the rest were highly to very highly dependent. The level of p above which there was no AM effect, defined here as the T' value, allowed distinction between AM dependence and responsiveness of the host and was very efficient for separating species according to these traits. Mycorrhizal responsiveness and dependency were not related and some species were responsive to increased p in the soil solution only when mycorrhizal. Efficiency of p uptake was affected by AM and by p levels. Some species exhibited a high efficiency independent of AM, while others were very inefficient even at high P. Despite differences between species, in most cases AM growth enhancement was nutritionally mediated. Differences in AM... Mostrar Tudo |
Palavras-Chave: |
Tropical forest. |
Thesagro: |
Floresta Tropical; Micorriza Vesicular Arbuscular. |
Thesaurus NAL: |
vesicular arbuscular mycorrhizae. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02207naa a2200181 a 4500 001 1624560 005 2003-10-15 008 2001 bl --- 0-- u #d 100 1 $aSIQUEIRA, J. O. 245 $aDependency on arbuscular mycorrhizal fungi and responsiveness of some Brazilian native woody species. 260 $c2001 520 $aArbuscular mycorrhiza (AM) associations are of great importance in forest ecology and land rehabilitation in the tropics, but information on AM susceptibility, host dependence, and host responsiveness to the fungi is scarce. The present study was carried out under greenhouse conditions in a low-fertility soil with 29 woody species. There were very large differences between plant species in AM colonization, responsiveness to inoculation, mycorrhizal dependency and efficiency of phosphorus (P) uptake. All of these parameters were influenced by available soil p in solution. AM colonization ranged from zero in several non-mycotrophic species to >60% in the highly mycotrophic ones. Ten species (34% of the total) were found to be mycorrhiza- independent or non-mycotrophic, whereas the rest were highly to very highly dependent. The level of p above which there was no AM effect, defined here as the T' value, allowed distinction between AM dependence and responsiveness of the host and was very efficient for separating species according to these traits. Mycorrhizal responsiveness and dependency were not related and some species were responsive to increased p in the soil solution only when mycorrhizal. Efficiency of p uptake was affected by AM and by p levels. Some species exhibited a high efficiency independent of AM, while others were very inefficient even at high P. Despite differences between species, in most cases AM growth enhancement was nutritionally mediated. Differences in AM responsiveness and dependency as well as the importance of these concepts for reforestation technology in the tropics are discussed. 650 $avesicular arbuscular mycorrhizae 650 $aFloresta Tropical 650 $aMicorriza Vesicular Arbuscular 653 $aTropical forest 700 1 $aSAGGIN JÚNIOR, O. J. 773 $tMycorrhiza, New York$gv. 11, p. 245-255, 2001.
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