The present volume contains papers developed from courses given at the International Union of Forest Research Organizations (IUFRO) Bio chemical Genetics Workshop (Working Party S.04-5) held at the Univer sity of Gottingen, Germany on July 5 through 28, 1973. The workshop was organized by Professor Robert G. Stanley and was held in memory of Professor Klaus Stern. Unfortunately, both met with untimely deaths. Professor Stanley was also instrumental in initiating the process of having the workshop proceedings published. I was asked by the workshop participants to complete this task, and I wish...