Embryogenesis

This chapter examines the essential characteristics of plant embryogenesis and the nature of the mechanisms that guide embryo formation. The sporophytic, or diploid, phase of plant development begins with the formation of a single cell, the zygote, which results from the fusion of the two haploid gametes, egg and sperm. During embryogenesis, the zygote transforms into a multicellular embryo with a characteristic rudimentary organization. The overall sequence of embryonic development follows a predictable pattern, reflecting the need for the embryo to be effectively packaged within the confines of the maternally derived tissues comprising the seed. The chapter compares the processes of embryogenesis in eudicots and monocots. It also looks at the formation and maintenance of apical meristems.