Structural Features and Hormonal Regulation of the Zygotic Embryogenesis in Cereals
Н. Н. Круглова, O.A. Seldimirova, А.Е. Zinatullina
Abstract
Unique structural features of the formation and development of cereal zygotic embryos at the phases of blastomerization and organogenesis are considered according to the Graminad-type of embryogenesis based on the analyzed descriptive plant embryology data. Different opinions on the morphology of specific organs of cereal mature embryos are given. The role of a number of leading endogenous hormones (auxins, cytokinins, and abscisic acid) in the regulation of the formation and development of cereal zygotic embryos is discussed. It is emphasized that hormonal and other experimental studies of cereal zygotic embryogenesis should be carried out on the basis of descriptive plant embryology of the structural features of the studied embryos at a particular developmental stage.