Combining an ecosystems approach with new insights at the molecular and biochemical level, this book presents the latest findings on how plants respond, physiologically, to sulfur in their environment. It explores key areas such as biotic and abiotic interactions, adaptations to fluctuating supply, and sulfurs role in plant metabolic networks to assess the functions and implications of this essential plant nutrient in a range of natural, semi-natural and anthropogenic environments. Leaders in the field, Hawkesford and de Kok, draw together an international group of experts in plant sulfur nutrition, to collate and integrate new information from molecular biology, ecology and physiology. The result is an important new reference on the relationships between plants and sulfur at all levels including contributions arising from recent omic approaches. With implications for issues such as agriculture, forestry, water management and ecosystem restoration, this book is relevant to a wide audience, from graduate level students and researchers, to policy makers and practitioners.