Considerable progress has been made recently towards the understanding of the physiological and biochemical events associated with moss protonema differentiation, and much current research work is focusing on events at the molecular level. This book critically evaluates the information now available. Various aspects of protonema differentiation are also discussed in relation to similar processes in other plant groups. Thus Dr. Bhatla provides, in a single comprehensive volume, a valuable source book for researchers and advanced students interested in cell differentiation in plants.