From the contents: Interaction of circadian oscillators and the cell developmental cycle in Euglena.- Control Points in the Chlamydomonas Cell Cycle.- Two possibilities for time measurement in synchronous Chlorella - circadian rhythm and timing.- Diatom mitosis: Implications of a Model System.- Wall morphogenesis in centric diatoms.- Cell elongation in the red alga Griffithsia: control by light, ions, and an endogenous glycoprotein hormone.- Molecular signals during sexual induction of Volvox carteri f. nagariensis.- Pheromone-inducible glycoproteins of the extracelluar matrix of Volvox and their possible role in sexual induction.- Environmental and Pheromonal Control of Sexual Reproduction in Laminaria.- Action of cell wall autolysins in asexual reproduction of filamentous green algae: evidence and species specificity.- Molecular recognition properties of Chlamydomonas HRGPs.- Maturation of a Flagellum/Basal Body Requires More Than one Cell Cycle in Algal Flagellates: Studies on Nephroselmis olivacea.- Protein synthesis in chloroplasts.- Comparison of envelope membranes from higher plants and algae plastids and of outer membranes from Cyanobacteria.- Regulation of chloroplast differentiation: Cooperation Between Light-Induced Processes and Internal Adaptation.- Interaction of nuclear and chloroplast mutations in biogenesis of chloroplast ribosomes in Chlamydomonas.- Evidence for Multiple Functions of the Intrinsic, 32-34 kDa Chloroplast Membrane Polypeptide of Scenedesmus in Photosystem II Reactions.- "Life cycle" of the 32 kDa-protein of Chlamydomonas chloroplasts.- Two Different Forms of LHC in the Green Alga chlamydobotrys stellata.- Taxonomic Index.- Subject Index. Die verschiedenen Entwicklungstypen und Rhythmen von Algen werden anhand von verschiedenen Beispielen erlautert, wobei die physiologischen Grundlagen im Vordergrund stehen.