Advances in Molecular Genetics of Plant-Microbe Interactions, Volume 1 : Proceedings of the 5th International Symposium on the Molecular Genetics of Plant-Microbe Interactions, Interlaken, Switzerland, September 9-14, 1990

Research on the interaction between plants and microbes has attracted considerable attention in recent years. The use of modem genetic techniques has now made possible a detailed analysis both of plant and of microbial genes involved in phytopathogenic and beneficial interactions. At the biochemical level, signal molecules and their receptors, either of plant or of microbial origins, have been detected which act in signal transduction pathways or as co-regulators of gene expression. We begin to understand the molecular basis of classical concepts such as gene-for-gene relationships, hypersensitive response, induced resistance, to name just a few. We realize, and will soon exploit, the tremendous potential of the results of this research for practical application, in particular to protect crop plants against diseases and to increase crop yield and quality. This exclung field of research, which is also of truly interdisciplinary nature, is expanding rapidly. A Symposium series has been devoted to it which began in 1982. Recently, the 5th International Symposium on the Molecular Genetics of Plant-Microbe Interactions was held in Interlaken, Switzerland. It brought together 640 scientists from almost 30 different countries who reported their latest research progress in 47 lectures, 10 short oral presentations, and on over 400 high-quality posters. This book presents a collection of papers that comprehensively reflect the major areas under study, explain novel experimental approaches currently in use, highlight significant advances made over the last one or two years but also emphasize the obstacles still ahead of us. Front Matter....Pages i-xv Front Matter....Pages 1-1 Molecular Strategies in the Interaction Between Agrobacterium and its Hosts....Pages 3-9 Signal Transduction Via Vir a and Vir G in Agrobacterium ....Pages 10-18 The T-DNA on its Way from Agrobacterium Tumefaciens to the Plant....Pages 19-27 Functional Organization of the Regions Responsible for Nopaline and Octopine Catabolism in Ti Plasmids of Agrobacterium Tumefaciens ....Pages 28-31 Gene-For-Gene Relationships Specifying Disease Resistance in Plant-Bacterial Interactions....Pages 32-36 Avirulence Gene D from Pseudomonas Syringae pv. Tomato and Its Interaction with Resistance Gene Rpg4 in Soybean....Pages 37-44 Genes and Signals Controlling the Pseudomonas Syringae pv. Phaseolicola-Plant Interaction....Pages 45-52 The hrp Gene Cluster of Erwinia Amylovora ....Pages 53-60 Characterization of Genes from Xanthomas Campestris pv. Vesicatoria That Determine Avirulence and Pathogenicity on Pepper and Tomato....Pages 61-64 Pectic Enzyme Production and Bacterial Plant Pathogenicity....Pages 65-72 Molecular Analysis of A Gene That Affects Extracellular Polysaccharide Production and Virulence in Pseudomonas Solanacearum ....Pages 73-77 Interactions Between Arabidopsis Thaliana and Phytopathogenic Pseudomonas Pathovars: A Model for the Genetics of Disease Resistance....Pages 78-83 Interaction Between Arabidopsis Thaliana and Xanthomonas Campestris ....Pages 84-89 Exopolysaccharides in the Interaction of the Fire-Blight Pathogen Erwinia Amylovora with its Host Cells....Pages 90-93 Iron as a Modulator of Pathogenicity of Erwinia Chrysanthemi 3937 on Saintpaulia Ionantha ....Pages 94-98 Genetic and Physiological Aspects of the Pathogenic Interaction of Clavibacter Michiganense subsp. Michiganense with the Host Plant....Pages 99-102 DNA Probes as Tools for the Study of Host-Pathogen Evolution: the Example of Pseudomonas Solanaacearum ....Pages 103-108 Front Matter....Pages 109-109 Overview on Genetics of Nodule Induction: Factors Controlling Nodule Induction by Rhizobium Meliloti ....Pages 111-118 Nodrm-1, a Sulphated Lipo-Oligosaccharide Signal of Rhizobium Meliloti Elicits Hair Deformation, Cortical Cell Division and Nodule Organogenesis on Alfalfa Roots....Pages 119-126 Rhizobium Meliloti Nodulation Gene Regulation and Molecular Signals....Pages 127-133 Front Matter....Pages 109-109 Genetic and Biochemical Studies on the Nodulation Genes of Rhizobium Leguminosarum bv. Viciae ....Pages 134-141 The Biochemical Function of the Rhizobium Leguminosarum Proteins Involved in the Production of Host Specific Signal Molecules....Pages 142-149 Studies on the Function of Rhizobium Meliloti Nodulation Genes....Pages 150-155 Genetics of Host Specific Nodulation by Bradyrhizobium Japonicum ....Pages 156-161 Signal Exchange Mediates Host-Specific Nodulation of Tropical Legumes by the Broad Host-Range Rhizobium Species NGR234....Pages 162-167 The use of the Genus Trifolium for the Study of Plant-microbe Interactions....Pages 168-173 Roles of Lectin in the Rhizobium -Legume Symbioses....Pages 174-181 Analyses of the Roles of R.Meliloti Exopolysaccharides in Nodulation....Pages 182-188 The Role of the Rhizobium Meliloti Exopolysaccharides EPS I and EPS II in the Infection Process of Alfalfa Nodules....Pages 189-194 Regulation of Nitrogen Fixation Genes in Rhizobium Meliloti ....Pages 195-202 Complex Regulatory Network for nif and fix Gene Expression in Bradyrhizobium Japonicum ....Pages 203-210 Geonomic Instability in Rhizobium : Friend or Foe?....Pages 211-214 Cytokinin Production by Rhizobia....Pages 215-221 Molecular Genetics of the Hydrogen Uptake System of Rhizobium Leguminosarum ....Pages 222-225 β-Glucuronidase (GUS) Operon Fusions as a Tool for Studying Plant-Microbe Interactions....Pages 226-229 Front Matter....Pages 231-231 Specificity of Plant-Fungus Interactions: Molecular Aspects of Avirulence Genes....Pages 233-241 Mutual Triggering of Gene Expression in Plant-Fungus Interactions....Pages 242-249 Fungal Signals Involved in the Specificity of the Interaction Between Barley and Rhynchosporium Secalis ....Pages 250-253 Molecular Determinants of Pathogenesis in Ustilago Maydis ....Pages 254-263 The B Locus of Ustilago Maydis : Molecular Analysis of Allele Specificity....Pages 264-271 Front Matter....Pages 231-231 An in Planta Induced Gene of Phytophthora Infestans Codes for Ubiquitin....Pages 272-275 Strategies for the Cloning of Genes in Tomato for Resistance to Fulvia Fulva ....Pages 276-279 Downy Mildew of Arabidopsis Thaliana Caused by Peronospora Parasitica: A Model System for the Investigation of the Molecular Biology of Host-Pathogen Interactions....Pages 280-283 Host-Pathogen Interactions in the System Arachis Hypogaea-Cercospora Arachidicola ....Pages 284-287 Front Matter....Pages 289-289 Genesis of Root Nodules and Function of Nodulins....Pages 291-299 Early Nodulins in Pea and Soybean Nodule Development....Pages 300-303 Different Modes of Regulation Involved in Nodulin Gene Expression in Soybean....Pages 304-309 Regulation of Nodule-Expressed Soybean Genes....Pages 310-316 Patterns of Nodule Development and Nodulin Gene Expression in Alfalfa and Afghanistan Pea....Pages 317-324 Endocytosis and the Development of Symbiosomes in the Pea- Rhizobium Symbiosis....Pages 325-330 Plant Genetic Control of Nodulation in Legumes....Pages 331-335 Genetic and Cellular Analysis of Resistance to Vesicular Arbuscular (VA) Mycorrhizal Fungi in Pea Mutants....Pages 336-342 Agrobacterium Rhizogenes T-DNA Genes and Sensitivity of Plant Protoplasts to Auxins....Pages 343-351 Chimaeras and Transgenic Plant Mosaics: A New Tool in Plant Biology....Pages 352-356 Identification of Signal Transduction Pathways Leading to the Expression of Arabidopsis Thaliana Defense Genes....Pages 357-364 Local and Systemic Gene Activation Following the Hypersensitive Response of Plants to Pathogens....Pages 365-366 Properties of Plant Defense Gene Promoters....Pages 367-372 Signals in Plant Defense Gene Activation....Pages 373-380 A Search for Resistance Gene-Specific Receptor Proteins in Lettuce Plasma Membrane....Pages 381-386 Pathogenesis-Related Proteins Exhibit Both Pathogen-Induced and Developmental Regulation....Pages 387-394 Front Matter....Pages 289-289 Pathogen-Induced Genes in Wheat....Pages 395-398 Biological Activity of PR-Proteins from Tobacco; Characterization of a Proteinase Inhibitor....Pages 399-402 Molecular Recognition in Plants: Identification of a Specific Binding Site for Oligoglucoside Elicitors of Phytoalexin Accumulation....Pages 403-420 Perception of Pathogen-Derived Elicitor and Signal Transduction in Host Defenses....Pages 421-427 Phosphoprotein-Controlled Changes in Ion Transport are Common Events in Signal Transduction for Callose and Phytoalexin Induction....Pages 428-431 Induced Systemic Resistance in Cucumber in Response to 2,6-Dichloro-Isonicotinic Acid and Pathogens....Pages 432-439 Front Matter....Pages 441-441 Genetic Aspects of Phenazine Antibiotic Production by Fluorescent Pseudomonads That Suppress Take-All Disease of Wheat....Pages 443-449 Secondary Metabolites of Pseudomonas Fluorescens Strain CHA0 Involved in the Suppression of Root Diseases....Pages 450-456 Tests of Specificity of Competition Amound Pseudomonas Syringae Strains on Plants Using Recombinant Ice-Strains and Use of Ice Nucleation Genes as Probes of in Situ Transcriptional Activity....Pages 457-464 Regulation of the Synthesis of Indole-3-Acetic Acid in Azospirillum ....Pages 465-468 Back Matter....Pages 469-483