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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia. |
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Data corrente: |
23/07/1997 |
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Data da última atualização: |
23/07/1997 |
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Autoria: |
MIRANDA, J. C. C. de. |
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Título: |
Effects of soil phosphorus on vesicular-arbuscular mycorrhiza in a brazilian cerrado. |
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Ano de publicação: |
1985 |
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Fonte/Imprenta: |
Reading: University of Reading, Maio, 1985. |
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Páginas: |
227p. |
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Série: |
Tese de Doutorado. |
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Idioma: |
Inglês |
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Notas: |
Tese de Doutorado. Orientada por: P.J.Harris. |
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Conteúdo: |
The direct effects of soil P on VA mycorrhizal fungi and VA micorrhiza development were investigated. An attempt was made to identify whether soil P or plant P is the promary factor controlling VA micorrhiza formation, by means of a split-root experiment with sorghum plants inoculated with Glomus macrocarpus and three phosphate levels. At low soil P, low plant P did not affect VA mycorrhizal root infection and external mycelium content. However, high plant P depressed root infection, but did not affect the external mycelium content to the same extent. At high soil P both parameters were similarly reduced. The direct effects of soil P on the VA endophyte Glomus macrocarpus were investigated in a cellophane-soil agar plate experiment. Spore germination and mycellium growth measured at ten different phosphate levels and three periods of incubation were independently affected by the P status of the soil. Both parameters were stimulated when 12.5 microgramas P.g-1 was applied to the soil and decreased with further soil P increments. At high soil P treatments spore germination became less sensitive to changes in P concentrations. The direct effects of soil P on different species of VA mycorrhizal fungi were also investigated. The VA endophytes, Glomus macrocarpus, Gigaspora heterogama and Glomus fasciculatus had different sensitivities to the P status of the soil. Spore germination was higher and mycelium growth more profuse for Gigaspora heterogama. However, the latter was more sensitive to phosphorus fertilization..... MenosThe direct effects of soil P on VA mycorrhizal fungi and VA micorrhiza development were investigated. An attempt was made to identify whether soil P or plant P is the promary factor controlling VA micorrhiza formation, by means of a split-root experiment with sorghum plants inoculated with Glomus macrocarpus and three phosphate levels. At low soil P, low plant P did not affect VA mycorrhizal root infection and external mycelium content. However, high plant P depressed root infection, but did not affect the external mycelium content to the same extent. At high soil P both parameters were similarly reduced. The direct effects of soil P on the VA endophyte Glomus macrocarpus were investigated in a cellophane-soil agar plate experiment. Spore germination and mycellium growth measured at ten different phosphate levels and three periods of incubation were independently affected by the P status of the soil. Both parameters were stimulated when 12.5 microgramas P.g-1 was applied to the soil and decreased with further soil P increments. At high soil P treatments spore germination became less sensitive to changes in P concentrations. The direct effects of soil P on different species of VA mycorrhizal fungi were also investigated. The VA endophytes, Glomus macrocarpus, Gigaspora heterogama and Glomus fasciculatus had different sensitivities to the P status of the soil. Spore germination was higher and mycelium growth more profuse for Gigaspora heterogama. However, the latter was more s... Mostrar Tudo |
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Palavras-Chave: |
Brasil; Micorriza vesicular-arbuscular; P. |
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Thesagro: |
Fertilizante; Fósforo; Solo. |
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Thesaurus Nal: |
Brazil; fertilizers; phosphorus; soil; vesicular arbuscular mycorrhizae. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02307nam a2200277 a 4500
001 1621906
005 1997-07-23
008 1985 bl uuuu m 00u1 u #d
100 1 $aMIRANDA, J. C. C. de
245 $aEffects of soil phosphorus on vesicular-arbuscular mycorrhiza in a brazilian cerrado.
260 $aReading: University of Reading, Maio$c1985
300 $a227p.
490 $aTese de Doutorado.
500 $aTese de Doutorado. Orientada por: P.J.Harris.
520 $aThe direct effects of soil P on VA mycorrhizal fungi and VA micorrhiza development were investigated. An attempt was made to identify whether soil P or plant P is the promary factor controlling VA micorrhiza formation, by means of a split-root experiment with sorghum plants inoculated with Glomus macrocarpus and three phosphate levels. At low soil P, low plant P did not affect VA mycorrhizal root infection and external mycelium content. However, high plant P depressed root infection, but did not affect the external mycelium content to the same extent. At high soil P both parameters were similarly reduced. The direct effects of soil P on the VA endophyte Glomus macrocarpus were investigated in a cellophane-soil agar plate experiment. Spore germination and mycellium growth measured at ten different phosphate levels and three periods of incubation were independently affected by the P status of the soil. Both parameters were stimulated when 12.5 microgramas P.g-1 was applied to the soil and decreased with further soil P increments. At high soil P treatments spore germination became less sensitive to changes in P concentrations. The direct effects of soil P on different species of VA mycorrhizal fungi were also investigated. The VA endophytes, Glomus macrocarpus, Gigaspora heterogama and Glomus fasciculatus had different sensitivities to the P status of the soil. Spore germination was higher and mycelium growth more profuse for Gigaspora heterogama. However, the latter was more sensitive to phosphorus fertilization.....
650 $aBrazil
650 $afertilizers
650 $aphosphorus
650 $asoil
650 $avesicular arbuscular mycorrhizae
650 $aFertilizante
650 $aFósforo
650 $aSolo
653 $aBrasil
653 $aMicorriza vesicular-arbuscular
653 $aP
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Registro original: |
Embrapa Agrobiologia (CNPAB) |
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| 2. |  | SUÑÉ, R. W. Onde criar as terneiras? Bagé: Embrapa Pecuária Sul, 2002. 3 p. (Embrapa Pecuária Sul. Comunicado técnico, 52).| Tipo: Comunicado Técnico/Recomendações Técnicas |
| Biblioteca(s): Embrapa Pecuária Sul. |
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| Registros recuperados : 117 | |
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