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Registro Completo |
Biblioteca(s): |
Embrapa Pantanal. |
Data corrente: |
25/08/1995 |
Data da última atualização: |
06/04/2017 |
Autoria: |
ANTUNES, V.; CARDOSO, E. J. B. N. |
Título: |
Growth and nutrient status of citrus plants as influenced by mycorrhiza and phosphorus application. |
Ano de publicação: |
1991 |
Fonte/Imprenta: |
Plant and Soil, v.131, n.1, p.11-19, 1991. |
Idioma: |
Inglês |
Conteúdo: |
To test the hypothesis that high levels of soluble phosphate applied in combination with VAM fungi, to citrus plant, can cause growth depression even in the absence of other limiting factors and also to test if rock phosphate, under these conditions, may be a satisfactory P source, a greenhouse experiment was conducted using sterilized soil with four levels of phosphate (0, 50, 100 and 200 ppm) P) supplied either as soluble P or as rock phosphate. Citrus seedlings were either inoculated with the vesicular-arbuscular mycorrhizal (VAM) fungus Glomus etunicatum or left uninoculated. Six months after the start of the experiment, the plants were harvested and shoot dry weight, P and K uptake, root colonization and the number of spores in 50 cm3 of soil were determined. Significant increases were found in dry matter yields and in P and K contents, due to VAM fungus inoculation, at the zero and 50 ppm soluble P levels and at all rock phosphate levels. At 100 ppm soluble P, the development of VAM plants was equivalent to than of non-VAM plants and at 200 ppm was significantly less than that of non-VAM plants. Root colonization and sporulation were reduced at higher P levels. The absolute growth depression of VAM plants at the higher P level was likely due to P toxicity. In addition, high leaf P and K concentrations may have interfered with carbohydrate distribution and utilization in these symbioses. Rock phosphate may be used with VAM citrus to substitute for medium amounts of soluble phosphate. MenosTo test the hypothesis that high levels of soluble phosphate applied in combination with VAM fungi, to citrus plant, can cause growth depression even in the absence of other limiting factors and also to test if rock phosphate, under these conditions, may be a satisfactory P source, a greenhouse experiment was conducted using sterilized soil with four levels of phosphate (0, 50, 100 and 200 ppm) P) supplied either as soluble P or as rock phosphate. Citrus seedlings were either inoculated with the vesicular-arbuscular mycorrhizal (VAM) fungus Glomus etunicatum or left uninoculated. Six months after the start of the experiment, the plants were harvested and shoot dry weight, P and K uptake, root colonization and the number of spores in 50 cm3 of soil were determined. Significant increases were found in dry matter yields and in P and K contents, due to VAM fungus inoculation, at the zero and 50 ppm soluble P levels and at all rock phosphate levels. At 100 ppm soluble P, the development of VAM plants was equivalent to than of non-VAM plants and at 200 ppm was significantly less than that of non-VAM plants. Root colonization and sporulation were reduced at higher P levels. The absolute growth depression of VAM plants at the higher P level was likely due to P toxicity. In addition, high leaf P and K concentrations may have interfered with carbohydrate distribution and utilization in these symbioses. Rock phosphate may be used with VAM citrus to substitute for medium amounts of solu... Mostrar Tudo |
Palavras-Chave: |
Aplicacao; Application; Efeito; Effect; Mycorrhiza. |
Thesagro: |
Fósforo; Glomus Etunicatum. |
Thesaurus Nal: |
phosphorus. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02126naa a2200229 a 4500 001 1785830 005 2017-04-06 008 1991 bl --- 0-- u #d 100 1 $aANTUNES, V. 245 $aGrowth and nutrient status of citrus plants as influenced by mycorrhiza and phosphorus application. 260 $c1991 520 $aTo test the hypothesis that high levels of soluble phosphate applied in combination with VAM fungi, to citrus plant, can cause growth depression even in the absence of other limiting factors and also to test if rock phosphate, under these conditions, may be a satisfactory P source, a greenhouse experiment was conducted using sterilized soil with four levels of phosphate (0, 50, 100 and 200 ppm) P) supplied either as soluble P or as rock phosphate. Citrus seedlings were either inoculated with the vesicular-arbuscular mycorrhizal (VAM) fungus Glomus etunicatum or left uninoculated. Six months after the start of the experiment, the plants were harvested and shoot dry weight, P and K uptake, root colonization and the number of spores in 50 cm3 of soil were determined. Significant increases were found in dry matter yields and in P and K contents, due to VAM fungus inoculation, at the zero and 50 ppm soluble P levels and at all rock phosphate levels. At 100 ppm soluble P, the development of VAM plants was equivalent to than of non-VAM plants and at 200 ppm was significantly less than that of non-VAM plants. Root colonization and sporulation were reduced at higher P levels. The absolute growth depression of VAM plants at the higher P level was likely due to P toxicity. In addition, high leaf P and K concentrations may have interfered with carbohydrate distribution and utilization in these symbioses. Rock phosphate may be used with VAM citrus to substitute for medium amounts of soluble phosphate. 650 $aphosphorus 650 $aFósforo 650 $aGlomus Etunicatum 653 $aAplicacao 653 $aApplication 653 $aEfeito 653 $aEffect 653 $aMycorrhiza 700 1 $aCARDOSO, E. J. B. N. 773 $tPlant and Soil$gv.131, n.1, p.11-19, 1991.
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Embrapa Pantanal (CPAP) |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Recursos Genéticos e Biotecnologia. Para informações adicionais entre em contato com cenargen.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
Data corrente: |
07/12/2005 |
Data da última atualização: |
08/02/2012 |
Autoria: |
ANDRADE, A. P. A. de; MASCARENHAS, M. M.; GALERA, J. M. S. V.; FUKUDA, W. M. G.; VALLE, T. L.; MENDES, R. A. |
Título: |
Levantamento dos recursos genéticos de Manihot no Brasil. |
Ano de publicação: |
2005 |
Fonte/Imprenta: |
In: SIMPOSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA Y EL CARIBE, SIRGEALC, 5., 2005, Montevideo, Uruguay. Resúmenes... Montevideo: Instituto Nacional de Investigación Agropecuaria: Universidad de la República, Facultad de Agronomía, 2005. |
Páginas: |
p. 38. |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Recursos genéticos vegetais. |
Thesagro: |
Mandioca. |
Thesaurus NAL: |
Manihot. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00800nam a2200217 a 4500 001 1186535 005 2012-02-08 008 2005 bl uuuu u01u1 u #d 100 1 $aANDRADE, A. P. A. de 245 $aLevantamento dos recursos genéticos de Manihot no Brasil. 260 $aIn: SIMPOSIO DE RECURSOS GENÉTICOS PARA AMÉRICA LATINA Y EL CARIBE, SIRGEALC, 5., 2005, Montevideo, Uruguay. Resúmenes... Montevideo: Instituto Nacional de Investigación Agropecuaria: Universidad de la República, Facultad de Agronomía$c2005 300 $ap. 38. 650 $aManihot 650 $aMandioca 653 $aBrasil 653 $aRecursos genéticos vegetais 700 1 $aMASCARENHAS, M. M. 700 1 $aGALERA, J. M. S. V. 700 1 $aFUKUDA, W. M. G. 700 1 $aVALLE, T. L. 700 1 $aMENDES, R. A.
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