Organogenesis in plants: the molecular and genetic control of ovule development

The ovule is the site of megagametogenesis and fertilization and hence is o f central importance to sexual reproduction in seed plants. In recent years , the ovule has become established as an excellent model system in which to study organogenesis. Progress has been made in several aspects of ovule de velopment: the control of ovule identity, the mechanism of primordium outgr owth, early pattern formation and the regulation of integument morphogenesi s.