CHRONOLOGICAL CHANGES IN THE INDUCTIVE ABILITY OF THE MESENCHYME OF THE DIGESTIVE ORGANS IN AVIAN EMBRYOS

Abstract

Dissociation and reassociation experiments were carried out to study the inductive ability of mesenchyme of the chicken [Gallus gallus domesticus] embryo esophagus, gizzard and intestine, using 3-day-old quail [Coturnix coturnix japonica] embryonic allantoic endoderm as an effector tissue. The mesenchyme of the esophagus and gizzard possesses inductive ability until the 11th day of incubation. Thereafter, it no longer has inductive influence on the allantoic endoderm. The intestinal mesenchyme was favorable to differentiation of allantoic endoderm into intestinal epithelium even on the 15th day of incubation. In all types of recombination tested, goblet cells differentiated among allantoic endodermal cells.