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Registro Completo |
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Biblioteca(s): |
Embrapa Mandioca e Fruticultura. |
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Data corrente: |
08/01/2002 |
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Data da última atualização: |
08/01/2002 |
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Autoria: |
BLAUDEZ, D.; BOTTON, B.; CHALOT, M. |
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Afiliação: |
University Henri Poincare. |
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Título: |
Cadmium uptake and subcellular compartmentation in the extomycorrhizalfungus Paxillus involutus |
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Ano de publicação: |
2000 |
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Fonte/Imprenta: |
Microbiology, v.146, n.5, p.1109-1117, 2000 |
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Idioma: |
Inglês |
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Conteúdo: |
Cadmium uptake and subcellular compartmentation in the ectomycorrhizalfungus Paxillus involutus were investigated using radiotracer fkux analyses. Concentration-dependent Cd2+-uptake kinetics were characterizedby a snooth, non-saturating curve that could be dissected into linear and saturable components. The linear-uptake kinetic component was interpreted as representing binding of Cd to apoplastic components, whereas the remaining saturable component was the result of carrier-mediatedtransport across the plasma membrane. Cell-wall-bound Cd was almost completely removed during desorption from cell-wall preparations. Cd2+desorption from intact mycelium was found to be a function of time involving three compartments corresponding in series to cell wall (50%), cytoplasm (30%) and vacuole (20%), when mycelia were exposed to a 0-05uMCd concentration. |
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Categoria do assunto: |
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Marc: |
LEADER 01271naa a2200145 a 4500
001 1650329
005 2002-01-08
008 2000 bl --- 0-- u #d
100 1 $aBLAUDEZ, D.
245 $aCadmium uptake and subcellular compartmentation in the extomycorrhizalfungus Paxillus involutus
260 $c2000
520 $aCadmium uptake and subcellular compartmentation in the ectomycorrhizalfungus Paxillus involutus were investigated using radiotracer fkux analyses. Concentration-dependent Cd2+-uptake kinetics were characterizedby a snooth, non-saturating curve that could be dissected into linear and saturable components. The linear-uptake kinetic component was interpreted as representing binding of Cd to apoplastic components, whereas the remaining saturable component was the result of carrier-mediatedtransport across the plasma membrane. Cell-wall-bound Cd was almost completely removed during desorption from cell-wall preparations. Cd2+desorption from intact mycelium was found to be a function of time involving three compartments corresponding in series to cell wall (50%), cytoplasm (30%) and vacuole (20%), when mycelia were exposed to a 0-05uMCd concentration.
700 1 $aBOTTON, B.
700 1 $aCHALOT, M.
773 $tMicrobiology$gv.146, n.5, p.1109-1117, 2000
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Registro original: |
Embrapa Mandioca e Fruticultura (CNPMF) |
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