The Annual Beltsville Symposium provides a forum for interaction among scientists involved in research that is vitally important to agri culture and to the agricultural sciences. The Twelfth Symposium in this series focused on the unifying biochemical and physiological mechan isms controlling growth and development of biological systems - ani mals, plants insects. Unraveling the complex biochemical mechanisms associated with the sequencing of organism growth and development and identifying, locating, and manipulating key control mechanisms are essential in utilizing the full potential of biotechnology for improving the composition and quality of agricultural products and the profitability of agriculture. Accordingly, speakers directed their remarks to basic aspects of biological mechanisms in their area of specialization with considera tion given to current status, future direction, potential impact, and limitations to progress. The Symposium addressed fundamental questions in: -Tissue specific gene regulation: cell division and differentiation -Mechanisms for regulating hormone concentration -Hormonal regulation of growth and development -Non-hormonal regulation of growth and development -Nutritional regulation of growth and development Because the backgrounds of the symposium attendees covered a wide spectrum in the basic biological and physical sciences, each topic was introduced by a brief overview, but general reviews were avoided in favor of findings from on-going research projects. The symposium brought together a distinguished group of invited scientists from around the world who are leaders. Many attendees made poster presentations which increased the exchange of ideas and sti mulated informal discussion.
Table of Contents1 Introduction: A Place in Science.- I: Tissue Specific Gene Regulation: Cell Division and Differentiation.- 2 Genetic Analysis of Cellular Differentiation in Yeast: The Cell Cycle and Meiosis.- 3 Regulation of Gene Expression by Indoleacetic Acid in Pea Epicotyl Tissue.- 4 Variant Forms of Growth Hormone and Control of Hormonal Action.- 5 Genetic Complexity of Drosophila Oogenesis: Mutations Affecting the Establishment or Maintenance of Cell Fate.- 6 Homeo Box Genes and Animal Development.- 7 Gene Transfer for Increased Animal Growth.- 8 Gene Insertion: Role and Limitations of Technique in Farm Animals as a Key to Growth.- 9 Peptide Production by and Growth Stimulation of Lung Cancer Cells.- 10 Bacterial Genes Specifying Cytokinin Biosynthesis: Structure, Function and Control of Expression.- II: Mechanisms for Regulating Hormone Concentration.- 11 Neuroendocrine Regulation of Insect Development.- 12 Strategies for the Discovery of Insect Control Agents: Exploitation of Biomechanisms Regulating Insect Development.- 13 Genetical and Chemical Approaches to the Metabolic Regulation and Mode of Action of Gibberellins in Plants.- 14 Biosynthesis of Ethylene and its Regulation in Plants.- 15 Mass Spectrometry, Genetics and Biochemistry: Understanding the Metabolism of Indole-3-Acetic Acid.- III: Hormonal Regulation of Growth and Development.- 16 Mechanisms by which Porcine Somatotropin Enhances Pig Growth Performance.- 17 Brain Neurotransmitters and Circulating Hormones in Control of Food Intake, Satiety and Appetite for Specific Macronutrients.- IV: Non-Hormonal Regulation of Growth and Development.- 18 Patterns of Phytochrome-Induced Gene Expression in Etiolated Pea Buds.- 19 Oligosaccharides as Signals for Plant Defensive Genes.- V: Nutritional Regulation of Growth and Development.- 20 Regulation of Fetal Growth: Importance of Growth and Tissue Deposition in the Pig.- 21 Ruminant Splanchnic Tissues - Energy Costs of Absorption and Metabolism.- 22 Influence of Early Plane of Nutrition on Enzyme Systems and Subsequent Tissue Deposition.- 23 Rhizobium Trifolii Polysaccharides, Oligosaccharides and other Metabolites Affecting Development and Symbiotic Infection of Clover Root Hairs.- VI: Pathogenic and Symbiotic Interaction.- 24 Mycorrhizas and Plant Growth and Development.- 25 Agrobacterium as a Gene Vector for Plants: Transfer of Genes Involved in Morphogenesis.- 26 The Effects of Infection on Growth.- 27 The Role of Interleukin-1 in Energy Balance.- 28 Influence of Parasitic Infection on Growth-Related Hormones and Nutrient Utilization in Cattle.- 29 Influence of Parasitism on Growth of Cattle Possibly Mediated Through Tumor Necrosis Factor.- Author Index.