Genetics of gametophyte biogenesis in Arabidopsis

The identification of several mutations and genes involved in sporogenesis and gametogenesis has initiated a genetic framework for understanding gamet ophyte biogenesis. Recent advances include the molecular characterization o f genes required for sporocyte formation and meiosis. These studies have re vealed some unexpected interactions linking development of sporophytic cell s and tissues with initiation and progression of gametophyte development in angiosperms.