Annual Plant Reviews, Volume 13 Plastids are essential plant organelles, vital for life on earth. They are important not just as photosynthetic organelles (chloroplasts) but also as sites involved in many fundamental intermediary metabolic pathways. Over the last decade, plastid research has seen tremendous advances and an exciting new picture is emerging of how plastids develop and function inside plant cells. The recent and rapid progress in the field has been due largely to reverse genetic approaches and forward genetic screening programs, which have resulted in the dissection of numerous chloroplast protein-function relationships. This book provides an overview of the current state of the art. It is directed at researchers and professionals in plant physiology, cell biology, genetics, molecular biology and biochemistry.