Abstract
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.
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