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Azione dell'ortovanadato su crescita e trasporto di ioni K + e H + in semi germinati di Ravanello (Raphanus sativus L.)

Maria Teresa Marrè;  Maurizio Cocucci;  Antonio Ballarin-Denti — 1978

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

Orthovanadate at concentrations of 20 to 500 μ ⁢ M markedly inhibits growth (as increase in fresh weight), net K + uptake and acidification of the medium for the incubation of germinating radish seeds. These data can be related to the previous finding that in membrane preparations from germinating radish seeds orthovanadate inhibits a non mitocondrial, K + , M + + -stimulated ATPase activity, tentatively identified with a plasmalemma ATPase involved in electrogenic proton extrusion.

Azione dell'ortovanadato sulle attività ATPasiche di preparati di membrane di semi germinati di Ravanello (Raphanus sativus L.)

Maurizio Cocucci;  Antonio Ballarin-Denti;  Maria Teresa Marrè — 1978

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti

Orthovanadate at concentrations between 20 and 50 μ ⁢ M markedly inhibits the DCCD—sensitive, K + stimulated ATPase activity of microsomal preparations from germinating radish seeds. The oligomycin-sensitive ATPase activity present in mitochondrial preparations (and, as a contaminant, also in microsomal preparations) is not inhibited by orthovanadate. These results are in full agreement with the recent data on the effects of vanadate on the ATPase activities of membrane preparations from Neurospora and...

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