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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: |
Effects of soil phosphorus on spore germination and hyphal growth of arbuscular mycorrhizal fungi. |
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Ano de publicação: |
1994 |
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Fonte/Imprenta: |
New Phytologist, v.128, p.103-108, 1994. |
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Idioma: |
Inglês |
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Conteúdo: |
The direct effects of soil phosphorus on spore germination and hyphal growth of the arbuscular mycorrhizal fungi (AM), Glomus etunicatum Beck. & Gerd., E3 and Scutellospora heterogama (Nicol. & Gerd.) Walker & Sanders, were investigated by means of two soil-agar place experiments. In the experiment, the percentage spore gemination and hyphal length of G. etunicatum, measured at ten different P levels and three periods of incubation, were affected by the P status of the soil. The best correlation with P level in the soil occurred at 7 d of incubation for spore germination and at 14 d for hyphal growth and hyphal growth increment. Spore germination was stimulated when 12-5/ug P g1 was applied to the soil and decreased with further soil P increments. Hyphal growth decreased significantly with soil P amendments above 37.5ug Pg-1. in the second experiment including three different P levels and the three AM endophytes, soil P affected spore germination and hyphal growth, and both decreased at the high phosphate treatment for G. etunicatum and S. heterogama. The E3 spore germination was similar to the other two species, but the hyphal growth was poorer. S. heterogama was more sensitive to P fertilzation than Glomus spp. and for the three species the hyphal production was not proportional to spore size. |
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Palavras-Chave: |
Arbuscular mycorrhizae; Micorriza arbuscular; Scutellospora heterogama. |
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Thesagro: |
Cerrado; Fósforo; Glomus Etunicatum; Solo. |
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Thesaurus Nal: |
phosphorus; soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01985naa a2200241 a 4500
001 1552702
005 1997-04-15
008 1994 bl --- 0-- u #d
100 1 $aMIRANDA, J. C. C. de
245 $aEffects of soil phosphorus on spore germination and hyphal growth of arbuscular mycorrhizal fungi.
260 $c1994
520 $aThe direct effects of soil phosphorus on spore germination and hyphal growth of the arbuscular mycorrhizal fungi (AM), Glomus etunicatum Beck. & Gerd., E3 and Scutellospora heterogama (Nicol. & Gerd.) Walker & Sanders, were investigated by means of two soil-agar place experiments. In the experiment, the percentage spore gemination and hyphal length of G. etunicatum, measured at ten different P levels and three periods of incubation, were affected by the P status of the soil. The best correlation with P level in the soil occurred at 7 d of incubation for spore germination and at 14 d for hyphal growth and hyphal growth increment. Spore germination was stimulated when 12-5/ug P g1 was applied to the soil and decreased with further soil P increments. Hyphal growth decreased significantly with soil P amendments above 37.5ug Pg-1. in the second experiment including three different P levels and the three AM endophytes, soil P affected spore germination and hyphal growth, and both decreased at the high phosphate treatment for G. etunicatum and S. heterogama. The E3 spore germination was similar to the other two species, but the hyphal growth was poorer. S. heterogama was more sensitive to P fertilzation than Glomus spp. and for the three species the hyphal production was not proportional to spore size.
650 $aphosphorus
650 $asoil
650 $aCerrado
650 $aFósforo
650 $aGlomus Etunicatum
650 $aSolo
653 $aArbuscular mycorrhizae
653 $aMicorriza arbuscular
653 $aScutellospora heterogama
700 1 $aHARRIS, P. J.
773 $tNew Phytologist$gv.128, p.103-108, 1994.
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