CEREAL ORGANOGENESIS AT THE EARLY STAGES OF ONTOGENESIS <i>IN VIVO</i> AS THE STRUCTURAL BASIS FOR EXPERIMENTAL RESEARCHES <i>IN VITRO</i>
The article presents the review of the works devoted to the identification of structural features of cereal organogenesis in the dynamics of development in vivo at the early stages of its ontogenesis from zygote to mature embryo. The periodizations of cereal zygotic embryogenesis based on these data are analyzed. It is emphasized that experimental researches of cereal embryos in vitro should be based on the data of classical embryology.