The challenges faced by Earth have never been more acute than they are now at the dawn of the 21st century. "In silico plants" may provide a unique albeit partial solution to several of the most daunting problems that we will face in the coming decades (the scarcity of oil and freshwater and the need to produce more food). Although there is no single solution to these emerging problems, systems biology is a vehicle for gaining advanced knowledge of mechanistic plant biology that may provide the scientific basis for such partial solutions. The techniques of molecular biology are revolutionizing the study of plants and will be used more and more by all plant biologists to discover the mechanisms of development and the control of developmental processes. This book will be useful to both undergraduate students and professional workers, especially those who have background in plant anatomy, plant physiology, or biochemistry.