The successful functioning of eukaryotic cells is dependent upon a highly organized intracellular cooperation and interaction between the numerous compartments which are present in them. In recent years unicellular algae have become increasingly recognized as favoured objects for studies on struc tural, biochemical and developmental aspects of compartmentation. Promp ted by these facts, Professor A. Pirson, former Directior of the Plant Physio logy Institute in Gottingen, suggested organizing a symposium entitled Com partments in Algal Cells and Their Interaction. This was then organized under the auspices of the Akademie der Wissen schaften in Gottingen with the fmancial support of the Stiftung Volkswa genwerk. The meeting took place in Gottingen in September of 1983 and was attended by a number of internationally renowned colleagues. The re stricted size of the meeting, together with the convivial atmosphere, led to an optimal exchange of views between the participants. This book presents the proceedings of this meeting and contains all the papers presented. We feel, however, that it contains information of use to a much larger circle of scientists than to phycologists alone. We should like to take this opportunity to express our thanks to all those involved in the convention, support and in day-to-day operation of the meeting. We also thank the contributors for their quick and effective co operation and, last but not least, the editorial staff of Springer Verlag, who enabled this book to appear only 9 months after the meeting took place, thus ensuring its up-to-date nature.

Inhalt
The Cytological Viewpoint of Functional Compartmentation (With 1 Figure).- Organization and Capacity of the Chloroplast Genome in Algae (With 2 Figures).- Structure and Expression of Chloroplast and Nuclear Genes in Chlamydomonas reinhardii (With 1 Figure).- Interactions Between Compartments in Acetabularia During Gene Expression (With 5 Figures).- Control of Gene Expression During the Early Phase of Chloroplast Development (With 9 Figures).- Aspects of Translational Coordination During Chloroplast Development (With 11 Figures).- Genome and Gene Organization of the Cyanelle DNA from Cyanophora paradoxa in Relation to the Common Organization in Chloroplasts (With 4 Figures).- The Organelle Versus Endosymbiont Problem of Cyanophora paradoxa (With 6 Figures).- CER, Cell Surface-Flagellum Relationships During Flagellar Development (With 15 Figures).- Regulation of Tubulin Gene Expression in Chlamydomonas reinhardii Following Flagellar Excision (With 3 Figures).- Flagellar Root-Mediated Interactions Between the Flagellar Apparatus and Cell Organelles in Green Algae (With 16 Figures).- Flagella Development in Chlamydomonas reinhardii: Some Regulatory Aspects Concerning the Shortening Response of the Flagella (With 7 Figures).- The Role of Chloroplast in Cell Cycle Control of Algae Dividing by Multiple Fission.- Metabolite Regulation of the Chloroplast Genome Expression and the Chloroplast-Cytoplasm Regulatory Relationships (With 7 Figures).- Contractile Vacuole Complexes in Algae (With 2 Figures).- Compartmentation of Ca2+ and its Possible Role in Volume Regulation of Poterioochromonas (With 7 Figures).- Interaction Between Chloroplast-Cytoplasm-Vacuoles with Respect to the Regulation of Nitrogen Metabolism in Chlorella (With 8 Figures).- Mitochondria and Their Interaction with Other Cell Components (With 4 Figures).- Interaction of the Golgi Apparatus and the Plasmalemma in the Cytomorphogenesis of Micrasterias (With 4 Figures).- Microbodies in Different Algae (With 3 Figure).- Cytological Aspects of Blue-Green Algal Endosymbiosis (With 16 Figures).- Endosymbioses: Evolutionary Trends in Cellular Compartmentation.- General Aspects of Location and Interaction of Respiratory and Photosynthetic Electron Transport in Blue-Green Alage (With 4 Figures).- Recent Aspects of Heterocyst Biochemistry and Differentiation (With 6 Figures).- Taxonomic Index.