THE EMBRYO OF BARLEY IN RELATION TO MODIFICATION OF THE ENDOSPERM

摘要: Differential dissection of the embryo barley grains, followed by observation extent modification and assessment α-amylase production in endosperm, has shown that various organs make following different contributions to modification. The isolated scutellum a very limited ability produce its powers enzyme secretion are largely restricted peripheral region where aleurone cells present. stimulus which initiates formation is derived from nodal embryo, especially base node subsidiary rootlets formed; apparently lacks means producing this stimulus. Translocation enzyme-inducing hormone takes place through apical half vascular tissue develops; preferred route translocation partially accounts for asymmetric pattern normally observed. Removal first foliar leaf within coleoptile allows increased endosperm: can be regarded as natural consumer gibberellin.