The advancement in crop improvement in the Past several decades have been phenomenal. During the last two decades or so enormous information about many facets of plant organization and development has been appearing. Some of these data are of great relevance and were sure to contribute significantly towards improvement of crop yield. This book incorporates review and research articles on varied aspects of plant science articles on varied aspects of plant science in 25 chapters. This book will be highly beneficial to student, teaches and research workers in the field of plant Biotechnology, Physiology, Agriculture and Plant Science.