Studies of the perception and transduction of hormonal signals in higher plants are relatively recent. Despite the rather small number of researchers involved in comparison, say, to those studying signalling in animals, plant scientists are becoming attracted to this important field because of the fascinating mechanisms being revealed and the recognition that any hope of understanding the ways in which the growth and development of the whole plant are controlled can only be based on an exploration of the physiology, biochemistry and molecular biology of these mechanisms. The Moscow symposium that gave rise to the present book drew many of the most active workers in the area, and many new developments were revealed. Audience: Important reading for all those interested in plant growth and development.