This book is based on invited and selected offered papers--suitably revised and updated--from the 7th International Plant Cold Hardiness Seminar held at Hokkaido University, Japan, in July 2004. These papers present the latest research findings on plant freezing and chilling stress from major laboratories around the world. They focus on various aspects of molecular genetics and in many cases the utilization of transgenic plants to further our understanding of plant cold hardiness at the molecular level.