Developmental Biology

Contributors and Presiding ChairmenForewordHistory of the Symposium VolumesI. The Role of Cytoplasmic Units Control Mechanisms in Plastid Development Introduction The Control of Plastid Development by the Nuclear Genome Proplastid to Chloroplast Summary Discussion Chairman's Comments References Nuclear and Cytoplasmic Control of Morphology in Neurospora Comparison of Biochemical and Morphological Mutants Nuclear Control of Morphology Extranuclear Control of Morphology Involvement of Mitochondria Possible Involvement of Mitochondrial DNA Cytology of Abnormal Cultures Biology of Conversion Cytochrome Pattern in Conversion Conclusions References Developmental and Control Processes in the Basal Bodies and Flagella of Chlamydomonas reinhardii Introduction The Development and Regression of Flagella and Basal Bodies in Chlamydomonas reinhardii The Genetic Control of Flagella Structure in Chlamydomonas reinhardii Macromolecular Basis of Morphopoiesis and Structure in Flagella Regeneration of Chlamydomonas Flagella: Some Experimental and Theoretical Considerations General Discussion ReferencesII. The Role of the Nucleus Genetic Systems Regulating Gene Expression during Development Introduction Illustrations of the Mode of Operation of a Regulatory System in Maize Evidence of Controlling Elements in Organisms Other Than Maize References Gene Action, Mitotic Frequency, and Morphogenesis in Higher Plants Introduction Relationships between Cell Enlargements and Cell Division Effects of Genes Acting at Different Stages of Development Developmental Features of Corngrass in Maize The Hooded Gene in Barley Relationship between Mitotic Frequency and Orientation of Mitoses Discussion and Summary References Regulation of the Cell Cycle in Mammalian Cells: Inferences and Speculations Based on Observations of Interspecific Somatic Hybrids Prefatory Note Introduction Properties of Rat X Mouse and Hamster X Mouse Hybrids Inferences concerning the Coordination of the Events of the Cell Cycle Appendix I: Summary of Work on Hybridization of Somatic Cells Appendix II: Notes References Masked Messenger RNA and Cytoplasmic DNA in Relation to Protein Synthesis and Processes of Fertilization and Determination in Embryonic Development Introduction Messenger RNA Stimulation of Protein Synthesis upon Fertilization Evidence for Masked Messenger RNA (mmRNA) Extent and Duration of Action of mmRNA mmRNA Synthesis during Early Development Polysome Formation upon Fertilization Protein Synthesis in Unfertilized Eggs Location of mmRNA in Unfertilized Eggs and in Developing Embryos Relation of Histones to mKNA Synthesis mmRNA Synthesis and Embryonic Determination Cytoplasmic DNA Summary Chairman's Comments ReferencesIII.