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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste; Embrapa Soja. |
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Data corrente: |
16/07/1998 |
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Data da última atualização: |
21/06/2010 |
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Autoria: |
WANG, G. M. |
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Título: |
Soil pH and vesicular-arbuscular mycorrhiza. |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
257 f. 1984. |
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Idioma: |
Inglês |
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Notas: |
Thesis (Doctor of Philosophy) - University of London, London. |
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Conteúdo: |
The effect of soil pH on fungi of vesicular-arbuscular (VA) mycorrhiza has not been studied systematically, despite its potential importance in reclamation of marginal lands for agriculture and in the continued exploitation of acid soils of the tropics. The presente study used long-term liming experiments at Rothamsted (clay soil) and at Woburn (sandy soil) where plots of widley different pH between 4.5 and 7.5 have been maintained for 22 years by differential liming. At both sites, mycorrhizas of oat (Avena sativa) and potato (Solanum tuberosum) were formed exclusively by 'fine endophyte' (Glomus tenue) at low pH, by coarse endophytes at high pH, but with a mistures of these types of endophyte at intermediate pH. Similar species of coarse endophytes, chiefly Glomus caledonicum, were present at both sites. The overall fraction of the host roots with mycorrhizal infection was similar at all levels of pH. Numbers of chlamydospores in the field soil declined with decreasing pH. The effects of sudden change in Ph were studied in pot experiments with gamma-irradiated Rothamsted soil. Crude inoculum of VA fungi taken from acid soil infected roots of plants almost equally well at all levels of soil pH. This was confirmed by liming untreated soil. However, onoculum from alkaline soil infected roots poorly when they grew in acid soil but during the growth of only one crop of oats the composition of the native populations of mycorrhizal fungi changed rapidly, so that subsequent crops in the same pots were similarly infected at all levels of pH. Small differences in adaptation to pH were found within a single species (Glomus caledonicum). Isolates of this species from pH 7.5 were less infective at reduced pH than were those from pH 5.5. These differences were defined in terms of the parameters of a mathematical model of root infection. Experiments with sand culture showed that aluminium (Al3+) and manganese (Mn2+), at concentrations similar to those in soil solution severely inhibited mycorrhizal infection, whereas a high concentration of hydrogen-ions did not. Manganese was five times less inhibitory than aluminium. It is concluded that populations of VA fungi are very mixed and that soil pH affects this natural species balance. Intra-species differences in physiological adaptation are relatively unimportant. Adaptation to changed pH may be rapid. The concentrations of ions of aluminium and manganese in soil solution seemed to be responsible for the effects of soil pH. MenosThe effect of soil pH on fungi of vesicular-arbuscular (VA) mycorrhiza has not been studied systematically, despite its potential importance in reclamation of marginal lands for agriculture and in the continued exploitation of acid soils of the tropics. The presente study used long-term liming experiments at Rothamsted (clay soil) and at Woburn (sandy soil) where plots of widley different pH between 4.5 and 7.5 have been maintained for 22 years by differential liming. At both sites, mycorrhizas of oat (Avena sativa) and potato (Solanum tuberosum) were formed exclusively by 'fine endophyte' (Glomus tenue) at low pH, by coarse endophytes at high pH, but with a mistures of these types of endophyte at intermediate pH. Similar species of coarse endophytes, chiefly Glomus caledonicum, were present at both sites. The overall fraction of the host roots with mycorrhizal infection was similar at all levels of pH. Numbers of chlamydospores in the field soil declined with decreasing pH. The effects of sudden change in Ph were studied in pot experiments with gamma-irradiated Rothamsted soil. Crude inoculum of VA fungi taken from acid soil infected roots of plants almost equally well at all levels of soil pH. This was confirmed by liming untreated soil. However, onoculum from alkaline soil infected roots poorly when they grew in acid soil but during the growth of only one crop of oats the composition of the native populations of mycorrhizal fungi changed rapidly, so that subsequent crops ... Mostrar Tudo |
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Palavras-Chave: |
Fungus; Inglaterra; Micorrhizal fungi; Microrriza; Mycorrhiza; pH do solo. |
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Thesagro: |
Fungo. |
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Thesaurus Nal: |
England; soil pH. |
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Categoria do assunto: |
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X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 03079nam a2200229 a 4500
001 1855654
005 2010-06-21
008 1984 bl uuuu m 00u1 u #d
100 1 $aWANG, G. M.
245 $aSoil pH and vesicular-arbuscular mycorrhiza.
260 $a257 f. 1984.$c1984
500 $aThesis (Doctor of Philosophy) - University of London, London.
520 $aThe effect of soil pH on fungi of vesicular-arbuscular (VA) mycorrhiza has not been studied systematically, despite its potential importance in reclamation of marginal lands for agriculture and in the continued exploitation of acid soils of the tropics. The presente study used long-term liming experiments at Rothamsted (clay soil) and at Woburn (sandy soil) where plots of widley different pH between 4.5 and 7.5 have been maintained for 22 years by differential liming. At both sites, mycorrhizas of oat (Avena sativa) and potato (Solanum tuberosum) were formed exclusively by 'fine endophyte' (Glomus tenue) at low pH, by coarse endophytes at high pH, but with a mistures of these types of endophyte at intermediate pH. Similar species of coarse endophytes, chiefly Glomus caledonicum, were present at both sites. The overall fraction of the host roots with mycorrhizal infection was similar at all levels of pH. Numbers of chlamydospores in the field soil declined with decreasing pH. The effects of sudden change in Ph were studied in pot experiments with gamma-irradiated Rothamsted soil. Crude inoculum of VA fungi taken from acid soil infected roots of plants almost equally well at all levels of soil pH. This was confirmed by liming untreated soil. However, onoculum from alkaline soil infected roots poorly when they grew in acid soil but during the growth of only one crop of oats the composition of the native populations of mycorrhizal fungi changed rapidly, so that subsequent crops in the same pots were similarly infected at all levels of pH. Small differences in adaptation to pH were found within a single species (Glomus caledonicum). Isolates of this species from pH 7.5 were less infective at reduced pH than were those from pH 5.5. These differences were defined in terms of the parameters of a mathematical model of root infection. Experiments with sand culture showed that aluminium (Al3+) and manganese (Mn2+), at concentrations similar to those in soil solution severely inhibited mycorrhizal infection, whereas a high concentration of hydrogen-ions did not. Manganese was five times less inhibitory than aluminium. It is concluded that populations of VA fungi are very mixed and that soil pH affects this natural species balance. Intra-species differences in physiological adaptation are relatively unimportant. Adaptation to changed pH may be rapid. The concentrations of ions of aluminium and manganese in soil solution seemed to be responsible for the effects of soil pH.
650 $aEngland
650 $asoil pH
650 $aFungo
653 $aFungus
653 $aInglaterra
653 $aMicorrhizal fungi
653 $aMicrorriza
653 $aMycorrhiza
653 $apH do solo
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Registro original: |
Embrapa Agropecuária Oeste (CPAO) |
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| Registros recuperados : 21 | |
| 2. |  | WANG, S. R.; WANG, G. M. Fisiologia: pesquisas realizadas. In: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR). Resultados de pesquisa de soja 1977/78. Londrina, 1978. p.66-87. II Reuniao de Pesquisa de Soja das Regioes Centro/Norte/Nordeste, Uberaba, 1978, e VI Reuniao de Pesquisa de Soja da Regiao Sul, Florianopolis, 1978.| Biblioteca(s): Embrapa Soja. |
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| 3. | | WANG, S. R.; WANG, G. M. Fisiologia vegetal. In: EMBRAPA. Centro Nacional de Pesquisa de Soja (Londrina, PR). Resultados de pesquisa de soja 1978/79. Londrina, 1979. 106-137. il.| Biblioteca(s): Embrapa Soja. |
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| 12. | | MARCHI, G.; MARCHI, E. C. S.; WANG, G.; MCGIFFEN, M. Effect of age of a sorghum-sudangrass hybrid on its allelopathic action. Planta Daninha, Viçosa, MG, v. 26, n. 4, p. 707-716, 2008.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - A |
| Biblioteca(s): Embrapa Cerrados. |
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| 16. | | ALMEIDA, A. M. R.; WANG, G. M.; DITTRICH, R. C.; CAMPOS, R. J. Efeito de estirpes do virus do mosaico comum da soja sobre crescimento vegetativo, nodulacao e teor de clorofila em quatro cultivares de soja. Fitopatologia Brasileira, Brasilia, v. 4, n. 3, p. 461-465, 1979.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: Nacional - B |
| Biblioteca(s): Embrapa Soja. |
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| 18. | | WANG, G. M.; STRIBLEY, D. P.; TINKER, P. B.; WALKER, C. Soil pH and vesicular-arbuscular mycorrhizas. In: FITTER, A.H.; ATKINSON, D.; READ, D.J. & BUSHER, M. Ecological interactions in soil. Oxford : Blackwell Scientific Publications, 1985. p.219-224. (The British Ecological Society. Special Publication, 4).| Biblioteca(s): Embrapa Soja. |
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| 19. | | LU, D.; CHEN, Q.; WANG, G.; MORAN, E.; BATISTELLA, M.; ZHANG, M.; LAURIN, G. V.; SAAH, D. Aboveground forest biomass estimation with Landsat and LiDAR data and uncertainty analysis of the estimates. International Journal of Forestry Research, v. 2012. p. 16, 2012 16 p.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: B - 2 |
| Biblioteca(s): Embrapa Territorial. |
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| 20. | | ZHU, B.; LOU, M-M.; XIE, G-L.; WANG, G-F.; ZHOU, Q.; WANG, F.; FANG, Y.; SU, T.; LI, B.; DUAN, Y-P. Enterobacter moro sp. nov., associated with bacterial wilt on morus alba L. International Journal of Systematic and Evoluationary Microbiology (2011), 61.| Biblioteca(s): Embrapa Agrobiologia. |
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| Registros recuperados : 21 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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