Plant cell membranes regulate nutrient uptake, act as receptors for environmental signals, protect the cell against pathogen attack, and catalyze energy-conserving processes in the mitochondria and the chloroplasts. This book contains twenty-three chapters by specialists in various aspects of plant membrane biology, providing a view of new and recent developments in the field that will interest plant physiologists, biochemists, cell biologists, and phytochemists involved in academic or industrial research.