Abstract: The ovule has been used as an excellent model system to study morphogenesis and organogenesis. Progress has been made in investigating the molecular mechanisms of several aspects of ovule development, such as identity control, early pattern formation, integument morphogenesis, and embryo sac development. A genetic network that controls the ovule development process is presented. In addition, the in vitro floral regeneration system is useful for studying the regulation of ovule development by plant hormones. This paper reviews the progress made in the investigation of ovule development.

Key words: Ovule, Mutant, Gene expression, Hormone