The approach will be more historical and provide an understanding of how each receptor system delivers a signal and some of the processes that are controlled. Development and competence of the plastid is the second area of emphasis, describing events that transform the etioplast to the chloroplast. The final portion of the chapter will discuss the communication between the chloroplast and the nucleus. These separate compartments must be in constant and precise communication to ensure coordinated gene expression that fulfills the requirements of the plastid for new proteins. While many of the proteins required for photosynthesis are encoded in the plastid itself, a subset of important genes reside.
