Abstract
Abstract : Ethylene stimulated RNA and protein synthesis in bean (Phaseolus vulgaris L. var. Red Kidney) abscission zone explants prior to abscission. The effect of ethylene on RNA synthesis and abscission was blocked by actinomycin D. Carbon dioxide, which inhibits the effect of ethylene on abscission, also inhibited the influence of ethylene on protein syntheses. An aging period appears to be essential before bean explants respond to ethylene. Kinetins, which retard senescence, will also block the action of ethylene. Stimulation of protein synthesis by ethylene occurred only in receptive or senescent explants. Treatment of juvenile explants with ethylene, which has no effect on abscission, also has no effect on protein synthesis. Evidence in favor of a hormonal role for ethylene during abscission is discussed.
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