Interaction of polyamines or their precursors with the calcium-controlled secretion of peroxidase by sugarbeet cells |
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| Authors: | Th Gaspar C Kevers M Coumans C Penel H Greppin |
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| Institution: | (1) Hormonologie fondamentale et appliquée, Institute de Botanique B22, Université de Liège-Sart Tilman, B-4000 Liège, (Belgium);(2) Laboratoire de Physiologie végétale, Université de Genève, 3, place de l'Université, CH-1211 Geneve 4, (Switzerland) |
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| Abstract: | Summary Three polyamines tested (cadaverine, spermidine and spermine) and their 2 precursors (the amino acids arginine and ornithine) inhibit the Ca2+-mediated secretion of peroxidases by sugarbeet cells in suspension culture at concentrations ranging from 10–15 to 10–5M. In the absence of exogenous Ca2+, spermine added at higher concentrations mimics the activatory effect of Ca2+, the other polyamines being without effect.Supported by the Belgian FRFC (grant No. 2.9009.75 to T.G.) and the Swiss National Foundation for Scientific Research (grant No. 3.140-0.81 to C.P. and H.G.). |
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