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| Registros recuperados : 85 | |
| 5. |  | MIRANDA, J. C. C. de. O ensino agrícola no Ministério da Agricultura. Boletim dos Cursos de Aperfeiçoamento, Especialização e Extensão, Rio de Janeiro, n. 6, p. 1-175, 1949. Boletim dos Cursos de Aperfeiçoamento, Especialização e Extensão, Rio de Janeiro, CNEPA, Universidade Rural, Rio de Janeiro, n.1-6, 1943/1949 - encadernado.| Biblioteca(s): Embrapa Solos. |
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| Registros recuperados : 85 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
15/04/1997 |
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Data da última atualização: |
15/04/1997 |
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Autoria: |
MIRANDA, J. C. C. de; HARRIS, P. J. |
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Título: |
The effect of soil phosphorus on the external mycelium growth of arbuscular mycorrhizal fungi during the early stages of mycorrhiza formation. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
Plant and Soil, v.166, p.271-280, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
The effects of soil P amendments and time of application on the formation of external mycelium by different arbuscular mycorrhizal (AM) fungi were studied. In the first experiment the external mycelium produced in the soil by the AM fungus Glomus etunicatum Beck. and Gerd., during the early stages of root colonization (7 and 14 days after inoculation), was quantified by the soil-agar film technique. A Brazilian Oxisol was used with three different phosphate and inoculation treatments for plant dry weight, P content in the tissue, root length and root colonization, at fourteen days after planting. At 7 days, mycelium growth, root colonization and their relationship were reduced at supra-optimal P concentrations. Applications of P one week after planting reduced mycelium growth and root colonization more than when applied to the soil before planting. In a second experiment the arbuscular mycorrhizal (AM) fungi, Scutellospora heterogama (Nicol. and Gerd.). Walker and Sanders and E3 were tested and compared with Glomus etunicatum. For the species studied, the length of external hyphae per unit of colonized root length was affected by small P additions but no further significant differences were observed at high P levels. The three AM endophytes showed marked differences in their response to P in the soil: Scutellospora heterogama, although producing external mycelium more profusely than the Glomus spp., showed a higher sensitility to soil P supply. |
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Palavras-Chave: |
Arbuscular mycorrhizae; Brasil; Glomus spp; Micorriza arbuscular; Scutellospora heterogama. |
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Thesagro: |
Cerrado; Fósforo; Solo. |
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Thesaurus NAL: |
Brazil; phosphorus; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02218naa a2200265 a 4500
001 1552704
005 1997-04-15
008 1994 bl --- 0-- u #d
100 1 $aMIRANDA, J. C. C. de
245 $aThe effect of soil phosphorus on the external mycelium growth of arbuscular mycorrhizal fungi during the early stages of mycorrhiza formation.
260 $c1994
520 $aThe effects of soil P amendments and time of application on the formation of external mycelium by different arbuscular mycorrhizal (AM) fungi were studied. In the first experiment the external mycelium produced in the soil by the AM fungus Glomus etunicatum Beck. and Gerd., during the early stages of root colonization (7 and 14 days after inoculation), was quantified by the soil-agar film technique. A Brazilian Oxisol was used with three different phosphate and inoculation treatments for plant dry weight, P content in the tissue, root length and root colonization, at fourteen days after planting. At 7 days, mycelium growth, root colonization and their relationship were reduced at supra-optimal P concentrations. Applications of P one week after planting reduced mycelium growth and root colonization more than when applied to the soil before planting. In a second experiment the arbuscular mycorrhizal (AM) fungi, Scutellospora heterogama (Nicol. and Gerd.). Walker and Sanders and E3 were tested and compared with Glomus etunicatum. For the species studied, the length of external hyphae per unit of colonized root length was affected by small P additions but no further significant differences were observed at high P levels. The three AM endophytes showed marked differences in their response to P in the soil: Scutellospora heterogama, although producing external mycelium more profusely than the Glomus spp., showed a higher sensitility to soil P supply.
650 $aBrazil
650 $aphosphorus
650 $asoil
650 $aCerrado
650 $aFósforo
650 $aSolo
653 $aArbuscular mycorrhizae
653 $aBrasil
653 $aGlomus spp
653 $aMicorriza arbuscular
653 $aScutellospora heterogama
700 1 $aHARRIS, P. J.
773 $tPlant and Soil$gv.166, p.271-280, 1994.
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