Embryology of barley. IV. Ultrastructure of the antipodal cells of Hordeum vulgare L. cv. Bomi before and after fertilization of the egg cell.

摘要: The antipodal cells have been the stepchildren in most investigations of female gametophyte. In Hordeum vulgare cv. Bomi, three are originally developed chalazally but because differential growth embryo sac they soon become laterally situated and their number increases to 35–50 shape, size structure change time before as well after fertilization. persist until about 60–70 h pollination. At that time, consists 12–15 a cellularization nuclear endosperm has started peripherally. nuclei, especially nucleoli, tremendously investigated period amounts organelles also change. walls antipodals diversified depending on which separating, wall invaginations between surrounding nucellar placental region. mitochondria appear various shapes section view, very often cups or dumbbells with rim ends containing cristae thin cristae-free base. These bases sometimes stretched out parts at last simple parting occurs. Binary fissions plastids happen hours just egg ER is extraordinarily whole investigation many ribosomes attached membranes. Dictyosomes form numerous vesicles, near ultrastructural details support opinion may play an important role able be responsible for supply nutrition gametophyte take part during formation.