Embryogeny of Phaseolus coccineus: The Suspensor and the Growth of the Embryo-Proper in vitro

摘要: Summary In in vitro embryo culture of Phaseolus coccineus, the presence suspensor stimulates growth embryo-proper and resulted a higher number plantlets when is cultured at heart stage. The effect stage specific; it has very little reaches cotyledon These results are accord with structural studies (Yeung And Clutter, 1978a, b). Detail ontogenetic indicate that specialized organ its activity maximal during development. GA 3 , most effective substance substituted for suspensor, however, ABA may also play regulatory role embryos. discussed relation to current hypotheses function.