Progress in Phytochemistry, Volume 7, provides an overview of the state of knowledge in phytochemical research. This book is dedicated to Dr. E. C. Bate-Smith, CBE, one of the leading pioneers of the subject. Many of the topics in this volume represent aspects of phytochemical research which he has encouraged in others or to which he has himself contributed. The book begins with a chapter on chemotaxonomy. It considers in critical detail the contribution of isozyme electrophoresis to the understanding of plant variation at the population level. This is followed by separate chapters on carbonic anhydrase; biochemical developments in seed germination; the role of plant hormones in the control of the germination process; non-protein amino acids of plants; and the production of phenolics in plants in response to microbial disease. Subsequent chapters cover the terpenoid variation encountered within a single genus of marine algae, among species of Laurencia; and plants with hallucinogenic activity.