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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
05/01/1994 |
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Data da última atualização: |
05/01/1994 |
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Autoria: |
ABBOTT, L. K.; ROBSON, A. D. |
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Afiliação: |
Elsevier Science Publishers B. V. |
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Título: |
Factors influencing the occurrence of vesicular-arbuscular mycorrhizas |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Agriculture Ecosystems and Environment, 35 (1991) 121-150. |
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Páginas: |
121-150 |
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Idioma: |
Inglês |
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Conteúdo: |
Vesicular-arbuscular (VA) mycorrhizas are widely distributed but there is limited knowledge of the occurrence of indivudual species in relation to soil, climate and vegetation. Recent developments in methods for identifuing VAM fungi, both in soil and within roots, should the clearer definition of the factors that influence their distribution. Careful attention must be paid sampling procedures to avoid bias and subjectivity. Soils commonly contain more than one VAM fungus. The development of VA mycorrhizas varies with soil type and depth, season and vegetation. The dynamics of root colonization by individual species within a population have not been adequately explored. Minor or gradual disturbances in agricultural and natural ecosystems may, or may not, lead marked changes in the environment without abrupt changes in the extent of colonization. In contrast, more extreme, or rapid environmental changes such as those associated with mining or erosin, may markedly decrease mycorrhiza formation. The restorarion of populations of mycorrhizal fungi will depend on the availability of accessible sources of propagules and on the suitability of the disturbed soils for plant and fungal growth. |
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Palavras-Chave: |
Fungos; Gigaspora spp. |
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Thesagro: |
Doença; Micorriza; Solo; Variação Sazonal. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01767naa a2200217 a 4500
001 1646404
005 1994-01-05
008 1991 bl --- 0-- u #d
100 1 $aABBOTT, L. K.
245 $aFactors influencing the occurrence of vesicular-arbuscular mycorrhizas
260 $c1991
300 $a121-150
520 $aVesicular-arbuscular (VA) mycorrhizas are widely distributed but there is limited knowledge of the occurrence of indivudual species in relation to soil, climate and vegetation. Recent developments in methods for identifuing VAM fungi, both in soil and within roots, should the clearer definition of the factors that influence their distribution. Careful attention must be paid sampling procedures to avoid bias and subjectivity. Soils commonly contain more than one VAM fungus. The development of VA mycorrhizas varies with soil type and depth, season and vegetation. The dynamics of root colonization by individual species within a population have not been adequately explored. Minor or gradual disturbances in agricultural and natural ecosystems may, or may not, lead marked changes in the environment without abrupt changes in the extent of colonization. In contrast, more extreme, or rapid environmental changes such as those associated with mining or erosin, may markedly decrease mycorrhiza formation. The restorarion of populations of mycorrhizal fungi will depend on the availability of accessible sources of propagules and on the suitability of the disturbed soils for plant and fungal growth.
650 $aDoença
650 $aMicorriza
650 $aSolo
650 $aVariação Sazonal
653 $aFungos
653 $aGigaspora spp
700 1 $aROBSON, A. D.
773 $tAgriculture Ecosystems and Environment, 35 (1991) 121-150.
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Embrapa Mandioca e Fruticultura (CNPMF) |
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