This book is the result of almost 30 years of research activity and achievements in the field of plant stress physiology. It comprehensively presents aspects related to stress induced by heavy metals, shielded magnetic field and microgravity on plants and microorganisms. It aims to provide not only scientific information but also may serve as a model of how to select relevant information from diverse research topics in order to settle a streamlined feature. The book covers the current status of research and provides pointers for future research goals.