Cell to Cell Signaling in Chlamydomonas.- Molecular Turnover and Memory: A Molecular Cell Biological Approach.- The Role of Extracellular Adhesion Proteins and of the Extracellular Matrix in Reaggregation of Dissociated Sponge Cells.- Detection and Transduction of Physical Stimuli in Plants.- Environmentally Induced Protein Movements and Membrane Reorganization: A Means for Inter and Intracellular Communication?.- Functional Recognition of Bacterial Mitogens by Reactive B Lymphocytes related to Membrane Protein Composition.- Hormones and Anti-Hormones Effects on Cultured Guinea-Pig Uterine Epithelial Cell Surface.- The Cell Surface in Signal Transduction: Membrane Glycoproteins.- Spatio-Temporal Organization of the Apoplast as a Signal Effector in Cell Growth Polarity: Experimental Evidence.- Glycoproteins as Putative Male Recognition Factors of the Pollen-Stigma Interaction in Brassica Oleracea.- Oligosaccharins — Complex Carbohydrate Regulatory Molecules.- Phosphoinositides in Cell Suspension Cultures of Glycine Max.- Flowering and Leaf-Shoot Interactions.- Circumnutation: A Model for Signal Transduction from Cell to Cell.- Are Microtubules and Microfibrils of Mimosa Motor Cells Involved in Leaf Motility?.- Storage and Retrieval of Morphogenetic Messages in Plantlets of Bidens Pilosus L..- Electrochemistry of Plant Membranes and Signal Transduction.