Reviews on Various Fields of Blue Light Action.- The Biological Significance and Evolution of Photosensory Systems.- Short Wavelength Light in Invertebrate Visual Sense Cells Pigments, Potentials and Problems.- Bacteriorhodopsin and its Position in the Blue Light Syndrome.- Chemical Modification of Bacteriorhodopsin by Phenylisothiocyanate: Effect on the Photocycle.- Effects of Blue Light on Movement of Microorganisms.- Blue Light-Induced Intracellular Movements.- Phytochrome and Non-Phytochrome Dependent Blue Light Effects on Intracellular Movements in Fresh-Water Algae.- Interaction Between Blue Light and Phytochrome in Photomorphogenesis.- Sensory Transduction in Phycomyces Photoresponses.- Regulation of Cell Growth and Cell Cycle by Blue Light in Adiantum Gametophytes.- Blue Light and Transcription.- Photoreceptors and Primary Reactions.- Spectroscopic and Photochemical Characterization of Flavoproteins and Carotenoproteins as Blue Light Photoreceptors.- Carotenoids as Primary Photoreceptors in Blue-Light Responses.- On the Nature of the Blue Light Photoreceptor: Still an Open Question.- Conformational Changes Caused by Blue Light.- Interactions of Flavins with Cytochrome C and Oxygen in Excited Artificial Systems.- Artificial Flavin/Membrane Systems; a Possible Model for Physiological Blue Light Action.- Effects of UV and Blue Light on the Bipotential Changes in Etiolated Hypocotyl Hooks of Dwarf Beans.- Blue Light-Controlled Conidiation and Absorbance Change in Neurospora are Mediated by Nitrate Reductase.- Phototropism in Phycomyces: a Photochromic Sensor Pigment?.- Blue and Near Ultraviolet Reversible Photoreaction in Conidial Development of Certain Fungi.- Blue Light Responses in the Siphonaceous Alga Vaucheria.- Cis to Trans Photoisomerization of ?-Carotene in Euglena gracilis Var. bacillaris W3BUL: Further Purification and Characterization of the Photoactivity.- Carotenogenesis.- Blue Light-Induced Carotenoid Biosynthesis in Microorganisms.- Photokillinl“t