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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
16/08/1995 |
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Data da última atualização: |
06/04/2017 |
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Autoria: |
SIQUEIRA, J. O.; SAFIR, G. R.; NAIR, M. G. |
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Título: |
Stimulation of vesicular-arbuscular mycorrhiza formation and growth of white clover by flavonoid compounds. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
New Phytologist, v.118, n.1, p.87-93, 1991. |
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Idioma: |
Inglês |
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Conteúdo: |
The effects of flavanoid copounds on VA mycorrhiza root colonization and growth of white clover (Trifolium repens L.) plants under growth chamber conditions are reported. The isoflavonoids, formonotein and biochanin A, previously identified from clover roots, stimulated colonization and growth of clover, while several other flavonoid compounds were inacxtive when tested at concentrations of 5 mg1-1. The flavone, chrysin, when applied at concentrations higher than those tested for formononetin and biochanin A, also increased root colonization and plant growth. The stimulatory effects of the isoflavonoids on plant growth were mediated by VA mycorrhizal fungi and were dependent on concentration, period of growth and soil spore density. maximum responses were found when 5 mgl-1 solutions were applied to soil containing 2 to 4 VA mycorrhizza spores g-1 of soil. These results may provide insights on the molecular mechanisms of host-fungus interaction and for the developement of technology to exploit the potential of the indigenous VA mycorrhizal fungi in field soil. |
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Palavras-Chave: |
Mycorrhiza. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01536naa a2200157 a 4500
001 1785662
005 2017-04-06
008 1991 bl --- 0-- u #d
100 1 $aSIQUEIRA, J. O.
245 $aStimulation of vesicular-arbuscular mycorrhiza formation and growth of white clover by flavonoid compounds.
260 $c1991
520 $aThe effects of flavanoid copounds on VA mycorrhiza root colonization and growth of white clover (Trifolium repens L.) plants under growth chamber conditions are reported. The isoflavonoids, formonotein and biochanin A, previously identified from clover roots, stimulated colonization and growth of clover, while several other flavonoid compounds were inacxtive when tested at concentrations of 5 mg1-1. The flavone, chrysin, when applied at concentrations higher than those tested for formononetin and biochanin A, also increased root colonization and plant growth. The stimulatory effects of the isoflavonoids on plant growth were mediated by VA mycorrhizal fungi and were dependent on concentration, period of growth and soil spore density. maximum responses were found when 5 mgl-1 solutions were applied to soil containing 2 to 4 VA mycorrhizza spores g-1 of soil. These results may provide insights on the molecular mechanisms of host-fungus interaction and for the developement of technology to exploit the potential of the indigenous VA mycorrhizal fungi in field soil.
653 $aMycorrhiza
700 1 $aSAFIR, G. R.
700 1 $aNAIR, M. G.
773 $tNew Phytologist$gv.118, n.1, p.87-93, 1991.
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Registro original: |
Embrapa Pantanal (CPAP) |
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