Auxin is an important plant hormone that controls numerous aspects of development and physiology, including responses to light, tissue patterning, and organogenesis. The book examines how auxin is synthesized, the biochemical basis for its actions, and its various different roles in plant biology. This essential volume covers: - The Nature of Auxin as a Signaling Molecule - Metabolism - The Story of ABP1 - Auxin in flower/fruit development - Gene regulatory networks - Systems and synthetic biology of auxin biology