This 1986 book describes the state of research in the area of secondary metabolism in plant cell and tissue culture. Such cultures are a major tool in horticulture and agriculture, and in the chemical industry. The wide range of applications is reflected in the articles presented here, which are grouped according to topic and derive from the meeting held by the International Association of Plant Cell and Tissue Culture in Sheffield in July 1985. This book was a major contribution to the development of plant biotechnology. It will remain of interest to researchers today.