At the end of the initial meeting on Primary and Secondary Metabolism of Plant Cell Cultures at Schloss Rauischholzhausen, it was decided to convene similar events on a regular basis midway between the International Congress for Plant Tissue and Cell Cul­ ture. We felt it was necessary to bring representatives of the research teams working in this field together to assess progress as well as to discuss future directions. The Plant Biotechnology Institute of the National Research Council of Canada in Saskatoon, Saskatchewan was chosen to be the site for the second symposium held in 1988. The theme of this meeting was "The Regulation of Primary and Secondary Metabol­ ism in Plant Cells" and judging by the contributions published in this volume it was a timely and actual one indeed. I would like to thank my organizing committee and my research group for their efforts, the National Research Council of Canada for the financial assistance and the participants for their contributions which all contributed to make this symposium a success. A special thank you to Mrs. L. -Blashill and R. Gallays for their assistance in hosting this event. Last but not least I would like to thank our publisher, Springer-Verlag, Heidelberg for their deci­ sion to publish the proceedings of this and future symposia.