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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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Embrapa Agrobiologia (CNPAB) |
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Registro Completo
Biblioteca(s): |
Embrapa Semiárido. |
Data corrente: |
15/07/1996 |
Data da última atualização: |
23/08/2023 |
Tipo da produção científica: |
Resumo em Anais de Congresso |
Autoria: |
SILVA, C. M. M. S. |
Afiliação: |
CELIA MARIA MAGANHOTTO S SILVA, CPATSA. |
Título: |
Banco ativo de germoplasma de forrageiras do CPATSA. |
Ano de publicação: |
1980 |
Fonte/Imprenta: |
In: SIMPOSIO DE RECURSOS GENETICOS VEGETAIS SESSAO I - BANCOS ATIVOS DE GERMOPLASMA, 1979, Brasilia, DF. Anais... Brasilia, DF: EMBRAPA-CENARGEN, 1980. |
Páginas: |
p. 183-184. |
Idioma: |
Português |
Conteúdo: |
A evolucao das plnatas tem gerado a variabilidade genetica e a grande diversidade de generos, especies e ecotipos de forrageiras tropicais disponiveis hoje. O limite de adaptacao de uma dada especie e fixada, nao somente pelo regime climatico da regiao fitogeografica onde ela ocorre, mas tambem pelo solo e fatores bioticos. Cientes da importancia que representam os recursos geneticos para a agricultura, os cientistas vem atuando ativamente no sentido de protege-los contra a extincao, propiciando sua melhor avaliacao e utilizacao a nivel nacional e internacional. Conhecendo-se as plantas e seu comportamento nos diferentes habitats pode-se planejar os melhores sistemas de aproveitamento das mesmas. Para responder as necessidades da regiao Semi-Arida do Nordeste, criou-se em 1977 o Banco Ativo de Germoplasma de Plantas Forrageiras do Centro de Pesquisa Agropecuaria do Tropico Semi-Arido (BAB-CPATSA), com os seguintes objetivos: - Avaliar as especies introduzidas quanto a capacidade de crescerem vigorosamente e persistirem sob as condicoes de clima e solo da regiao. - Caracterizar taxonomicamente, multiplicar e avaliar as forrageiras nativas, a selecao das especies mais promissoras a cultivos sistematicos. O BAG-CPATSA esta localizado no municipio de Petrolina, cuja precipitacao pluviometrica e de 350 a 400 mm, irregularmente distribuidos de nobembro a abril. A temperatura media mensal maxima e de 28,5oC e a media mensal minima e de 24oC. A umidade relativa media anual do ar e de 56%. O BAG e formado por um (...). MenosA evolucao das plnatas tem gerado a variabilidade genetica e a grande diversidade de generos, especies e ecotipos de forrageiras tropicais disponiveis hoje. O limite de adaptacao de uma dada especie e fixada, nao somente pelo regime climatico da regiao fitogeografica onde ela ocorre, mas tambem pelo solo e fatores bioticos. Cientes da importancia que representam os recursos geneticos para a agricultura, os cientistas vem atuando ativamente no sentido de protege-los contra a extincao, propiciando sua melhor avaliacao e utilizacao a nivel nacional e internacional. Conhecendo-se as plantas e seu comportamento nos diferentes habitats pode-se planejar os melhores sistemas de aproveitamento das mesmas. Para responder as necessidades da regiao Semi-Arida do Nordeste, criou-se em 1977 o Banco Ativo de Germoplasma de Plantas Forrageiras do Centro de Pesquisa Agropecuaria do Tropico Semi-Arido (BAB-CPATSA), com os seguintes objetivos: - Avaliar as especies introduzidas quanto a capacidade de crescerem vigorosamente e persistirem sob as condicoes de clima e solo da regiao. - Caracterizar taxonomicamente, multiplicar e avaliar as forrageiras nativas, a selecao das especies mais promissoras a cultivos sistematicos. O BAG-CPATSA esta localizado no municipio de Petrolina, cuja precipitacao pluviometrica e de 350 a 400 mm, irregularmente distribuidos de nobembro a abril. A temperatura media mensal maxima e de 28,5oC e a media mensal minima e de 24oC. A umidade relativa media anual do ar e d... Mostrar Tudo |
Palavras-Chave: |
BAG; CPATSA; EMBRAPA; Pernambuco; Petrolina. |
Thesagro: |
Banco de Germoplasma; Planta Forrageira. |
Thesaurus NAL: |
Forage grasses; Germplasm. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/192477/1/SILVA-C.-M.-M.-de-S.-1980.pdf
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Marc: |
LEADER 02221nam a2200229 a 4500 001 1133243 005 2023-08-23 008 1980 bl uuuu u00u1 u #d 100 1 $aSILVA, C. M. M. S. 245 $aBanco ativo de germoplasma de forrageiras do CPATSA. 260 $aIn: SIMPOSIO DE RECURSOS GENETICOS VEGETAIS SESSAO I - BANCOS ATIVOS DE GERMOPLASMA, 1979, Brasilia, DF. Anais... Brasilia, DF: EMBRAPA-CENARGEN$c1980 300 $ap. 183-184. 520 $aA evolucao das plnatas tem gerado a variabilidade genetica e a grande diversidade de generos, especies e ecotipos de forrageiras tropicais disponiveis hoje. O limite de adaptacao de uma dada especie e fixada, nao somente pelo regime climatico da regiao fitogeografica onde ela ocorre, mas tambem pelo solo e fatores bioticos. Cientes da importancia que representam os recursos geneticos para a agricultura, os cientistas vem atuando ativamente no sentido de protege-los contra a extincao, propiciando sua melhor avaliacao e utilizacao a nivel nacional e internacional. Conhecendo-se as plantas e seu comportamento nos diferentes habitats pode-se planejar os melhores sistemas de aproveitamento das mesmas. Para responder as necessidades da regiao Semi-Arida do Nordeste, criou-se em 1977 o Banco Ativo de Germoplasma de Plantas Forrageiras do Centro de Pesquisa Agropecuaria do Tropico Semi-Arido (BAB-CPATSA), com os seguintes objetivos: - Avaliar as especies introduzidas quanto a capacidade de crescerem vigorosamente e persistirem sob as condicoes de clima e solo da regiao. - Caracterizar taxonomicamente, multiplicar e avaliar as forrageiras nativas, a selecao das especies mais promissoras a cultivos sistematicos. O BAG-CPATSA esta localizado no municipio de Petrolina, cuja precipitacao pluviometrica e de 350 a 400 mm, irregularmente distribuidos de nobembro a abril. A temperatura media mensal maxima e de 28,5oC e a media mensal minima e de 24oC. A umidade relativa media anual do ar e de 56%. O BAG e formado por um (...). 650 $aForage grasses 650 $aGermplasm 650 $aBanco de Germoplasma 650 $aPlanta Forrageira 653 $aBAG 653 $aCPATSA 653 $aEMBRAPA 653 $aPernambuco 653 $aPetrolina
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