Morphogenic Signals and Markers in vitro and in vivo..- In vitro Organogenesis and Somatic Embryogenesis: Physiological and Biochemical Aspects..- Relation between Some Cytological, Biochemical, Molecular Markers and Plant Morphogenesis..- What Is the Significance of the Relatively Large Tubulin Multigene Families for Plant Morphogenesis?.- Polyamines and Morphogenesis in Normal and Transgenic Plant Cultures..- Polyamines and Morphogenesis in Monocots: Experimental Systems and Mechanisms of Action..- The Molecular Basis of Cell Cycle Control in Arabidopsis thaliana..- Developmental and Abscisic Acid Regulation of Gene Expression during Embryogenesis..- Molecular Studies of Shoot Meristem Activity during the Vegetative -to- Floral Transition..- Secreted Proteins in Plant Cell Cultures..- An Assessment of Possible Factors Contributing to Recalcitrance of Plant Protoplasts..- Gene Expression in Mesophyll Protoplasts..- Antisense RNA in Plants: A Tool for Analysis and Suppression of Gene Function..- Phytoactive Polymers: New Synthetic Plant Growth Regulators..- Author Index.