Abstract
Several peroxidase fractions were separated by disc electrophoresis of extract of apple seed embryos. Three fractions of slowest electrophoretic mobility showed little substrate specificity, did not change during seed development and were not influenced by plant hormones. The appearance of the faster moving peroxidases was stimulated by gibberellin and benzyladenine, inhibited by abscisic acid and coumarin and unaffected by indolylacetic acid. The stimulation of those peroxidases by gibberellin, strong in dormant apple embryos, diminished during seed after-ripening.
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