Plants are superb synthesizers of organic compounds, producing an extensive range of products from the simple building blocks of carbon dioxide, water and inorganic ions. These secondary products are widely used in commerce, particularly the food and pharmaceutical industries. Recent advances in the techniques of plant biotechnology and genetic engineering have increased the potential of plant cell cultures as an important source of these compounds. Researchers are now beginning to understand the factors that control the expression and regulation of genes involved in the synthesis, transport, storage and metabolism of natural products. This volume contains contributions from eminent researchers who provide an up-to-date review of current work in this field and detail the exciting advances now being made.