Molecular genetics of plant-microbe interactions : Proceedings of the Third International Symposium on the Molecular Genetics of Plant-Microbe Associations, Montréal, Québec, Canada, July 27-31, 1986

Increased interest in the basic biology of plants and microorganisms stems from the fact that crop productivity is directly affected by plant-microbe interactions. In spite of the fact that plants exist in the environment amongst diverse species of microorganisms, only a few ever establish a direct relationship. Emerging awareness concerning the indirect effect of microbial association on plant growth and the possibility of using one microbe against another for controlling pathogenic interactions is at the genesis of new fields of studies. The primary reason for a microbe to associate with· photoautotrophic organisms (plants) is to tap its nutritional requirements, fixed carbon, as a source of energy. By hook or by crook, a microbe must survive. Some have evolved mechanisms to exploit plants to develop a niche for their biotropic demands. When in contact with a living plant, microorganisms may live in a passive association using exudates from the plant, invade it pathogenically or coexist with it in symbiosis. The plant responds to the interloper, either reacting in a hypersensitive manner to contain the invasion of pathogens, or by inducing a set of genes that leads toward symbiosis, or by simply succumbing to the invader. Thus, prior to contact wi th the plant, mic roorganism is able to sense the presence of the host and activate accordingly a set of genes required for the forthcoming interaction, whether symbiotic or pathogenic. Front Matter....Pages I-XXXII Front Matter....Pages 1-1 Ecology of Agrobacterium: Plasmids and Biovars....Pages 3-5 The Agrobacterium Rhizogenes Root-Inducing System....Pages 6-10 Effect of the Presence of the Plasmid pSA and of Auxin on the Attachment of Agrobacterium Tumefaciens to Plant Host Cells....Pages 11-13 Dual Regulation of Virulence Genes of Agrobacterium Plasmid pTiC58....Pages 14-19 Overdrive , A T-DNA Transmission Enhancer on the A. Tumefaciens Tumor-Inducing Plasmid....Pages 20-26 Physical Structure and Genetics of the T-DNA in Plants Transformed by Agrobacterium tumefaciens ....Pages 27-31 Mammalian Metallothionein Functions in Plants....Pages 32-34 Tumorigenesis and root nodulation by Agrobacterium tumefaciens carrying Rhizobium sym plasmids....Pages 35-40 Front Matter....Pages 41-41 Cutinase and Pectinase in Host-Pathogen and Plant-Bacterial Interaction....Pages 43-50 Siderophore Biosynthesis, Uptake and Effect on Potato Growth of Rhizosphere Strains....Pages 51-53 A Gene Cluster in Xanthomonas campestris pv campestris Required for Pathogenicity Controls the Excretion of Enzymes....Pages 54-56 Direct Analysis of the Invasiveness of Xanthomonas Campestris Mutants Generated by Tn4431, A Transposon Containing A Promoterless Luciferase Cassette for Monitoring Gene Expression....Pages 57-60 Analysis of the Spontaneous Mutation to Avirulence by Pseudomonas Solanacearum ....Pages 61-66 Characterization of Pathogenicity Genes of Erwinia Carotovora ....Pages 67-72 Characterization of a Novel Esterase Produced by Plant Pathogenic Streptomyces ....Pages 73-75 Front Matter....Pages 77-77 Induced Symbiosis Mutants of Pisum Sativum....Pages 79-84 Plant Host Genetics of Nodulation Initiation in Soybean....Pages 85-90 A Mutant of Pea (Pisum sativum) Possibly Disturbed in the Production of a Compound Required for the Induction of Nitrogenase Activity in Bacteroids....Pages 91-93 Non-Nodulation Mutants of Soybean....Pages 94-95 Early Nodulins in Root Nodule Development....Pages 96-101 Front Matter....Pages 77-77 Peribacteroid Membrane Nodulins of Soybean....Pages 102-107 Isolation of Nodule Specific c-DNA Clones from Medicago sativa....Pages 108-111 Analysis of Nodule-Specific Gene Expression in Ineffective Alfalfa Root Nodules and Callus Cultures Derived from Ineffective Root Nodules....Pages 112-114 Nodule Specific Genes in Phaseolus Vulgaris ....Pages 115-117 Investigation of Plant Genes Expressed During Symbiotic Nitrogen Fixation....Pages 118-119 Rhizobium Induced Plant Proteins in Target Root Epidermal Cells of Vigna Unguiculata ....Pages 120-122 Four Soybean Nodulin Genes Evolved from a Common Ancestor....Pages 123-126 Coordinated Expression of Nodule-Specific and Root Genes in Yellow Lupin....Pages 127-129 Plant Gene Expression During Effective and Ineffective Nodule Development of the Tropical Stem-Nodulated Legume Sesbania Rostrata ....Pages 130-132 Expression of Two Enzymes Involved in Ureide Formation in Soybean Regulated by Oxygen....Pages 133-137 Probing Cell Wall Structure in the Soybean Root Nodule....Pages 138-140 Monoclonal Antibodies to Components of Rhizobium -Induced Pea Nodules....Pages 141-141 Localization of the Glutamine Synthetase Polypeptides in Phaseolus Root Nodules....Pages 142-144 Changes in Protein and mRNA Accumulation in Potato Tubers Treated with an Elicitor....Pages 145-148 Front Matter....Pages 149-149 Organization of the Rhizobium Phaseoli Genome....Pages 151-156 Rifampin Resistance and Nodulating Competitiveness in Rhizobium Meliloti ....Pages 157-158 A Method for Isolating Competition Defective Mutants in Rhizobium ....Pages 159-161 Genetic Determinants of Nodulation in pRIe 1001 a: nodD ....Pages 162-164 Symbiotic Mutants of Rhizobium Meliloti Which Produce Non-Succinylated Exopolysaccharide....Pages 165-166 Rhizobium Mutants Defective in Lipopolysaccharide and Infection....Pages 167-168 Front Matter....Pages 149-149 Analysis of Three Rhizobium phaseoli Genes, psi , psr and pss , Which Affect Exopolysaccharide Synthesis and Symbiotic Nitrogen Fixation and/or Nodulat Ion....Pages 169-170 Involvement of pSYM Nodulation Genes in Production of Surface and Extracellular Components of Rhizobium trifolii Which Interact With White Clover Root Hairs....Pages 171-172 Rhizobium Exopolysaccharides are Essential for the Formation of Nitrogen Fixing Nodules in the Rhizobium-Legume Symbiosis....Pages 173-178 Coinoculation with Symbiotically Defective Mutants of Rhizobium meliloti ....Pages 179-181 Surface Properties of Rhizobium meliloti Associated with Symbiosis....Pages 182-184 Degradative Enzymes in Rhizobium meliloti ....Pages 185-187 Identification of Host Specificity DNA Regions Determining the Broad Host Range Nodulation of Rhizobium Strain NGR234....Pages 188-190 NIF , FIX and NOD Gene Clusters in Bradyrhizobium Japonicum , and NifA -Mediated Control of Symbiotic Nitrogen Fixation....Pages 191-196 Molecular Genetics of Nodulation of Soybean by Bradyrhizobium Japonicum ....Pages 197-201 Characterization of Genes Essential for Symbiotic Nitrogen Fixation From Bradyrhizobium japonicum Strain I110....Pages 202-207 Nodulation Genes of the Stem Nodulating Sesbania Rostrata Symbiont, Strain ORS571....Pages 208-210 NOD-Linked Host Specific Gene for Soybean (Peking) Nodulation in Rhizobium Fredii USDA193....Pages 211-213 Genomic Organization of Nodulation Genes in Rhizobium phaseoli ....Pages 214-216 Common and Host Specific Nodulation Genes in Rhizobium Meliloti and Their Conservation in Other Rhizobia....Pages 217-222 Host Specific Nodulation: Effects of Multiple nodD Genes of Rhizobium meliloti ....Pages 223-224 Nodulation Genes of Rhizobium Leguminosarum ....Pages 225-228 Interactions Between Rhizobium Meliloti and Rhizobium Trifolii Nodulation Genes: What is the Basis for Dominance by R. Meliloti ?....Pages 229-231 Multiple Host-Specificity Loci in the Broad Host-Range Rhizobium NGR234....Pages 232-237 Conserved Nodulation Genes are Obligatory for Nonlegume Nodulation....Pages 238-240 Characterization of Symbiotic Genes and Regulation of Their Expression in Rhizobium Leguminosarum PRE....Pages 241-243 Front Matter....Pages 149-149 Regulation of the Promoters in the Nodulation Region of the Symbiosis Plasmid pRL1JI of Rhizobium Leguminosarum ....Pages 244-246 Naringenin Induces the nodABC Promotor of Rhizobium Leguminosarum as Well as Tsr Factor Production....Pages 247-249 An ntr C homologue in B. japonicum ....Pages 250-254 Glutamine Synthetases of Rhizobium Leguminosarum ....Pages 255-257 Molecular Analysis of a Fix Cluster From Rhizobium Meliloti ....Pages 258-263 Regulation of the Nitrogen Fixation ( nif ) Genes in Rhizobium Meliloti ....Pages 264-265 The Unusual Symbiosis Between the Nitrogen Fixing Bacterium ORS571 and Its Host Sesbania Rostrata : Regulation of Nitrogen Fixation and Assimilation Genes in the Free Living Versus Symbiotic State....Pages 266-271 Analysis of Azorhizobium Sesbaniae ORS571 N 2 Fixation Genes....Pages 272-275 Identification, Characterisation and Sequence Analysis of the Rhizobium Leguminosarum Nif A Gene....Pages 276-278 Analysis of hup DNA and Hup host range of Rhizobium leguminosarum BIO....Pages 279-281 Bioluminescence in Root Nodules of Soybean Controlled by Nitrogenase Promoters....Pages 282-287 In Vivo Cloning of Genes from Bradyrhizobium Japonicum ....Pages 288-291 Genes for the Catabolism and Synthesis of a Nodule-Specific, Opine-Like Compound are Closely Linked and on the Sym Plasmid of Rhizobium Meliloti....Pages 292-294 Molecular Biology of Genes Involved in Carbon Metabolism in Rhizobium Meliloti and Bradyrhizobium Japonicum ....Pages 295-297 Azorhizobium Sesbaniae ORS571 Conducts Synergistic N 2 Fixation and Nicotinic Acid Oxidation....Pages 298-300 At Least Three Loci Encode the Leaf-Curl Phenotype in Rhizobium Strain IC3342 ....Pages 301-302 Front Matter....Pages 303-303 Use of Heterologous Hybridization in Phylogenetic Studies of Symbiotic Anabaena Strains....Pages 305-306 Chromobacterium Lividum NCTC 10590 is a Nitrogen-Fixing Agrobacterium Radiobacter ....Pages 307-308 Studies on the Diazotrophic Nature of Agrobacterium ....Pages 309-312 Developments in the Genetic Analysis of Azospirillum ....Pages 313-316 Front Matter....Pages 317-317 Role of VIR Genes in the Excision of T-DNA from the Ti-Plasmid....Pages 319-324 Cloning Vectors for Coryneform Bacteria....Pages 325-327 Cloning of Serratia Liquefaciens Chitinase Gene(s)....Pages 328-330 Back Matter....Pages 331-338 Proceedings of the Third International Symposium on the Molecular Genetics of Plant-Microbe Interactions, Montreal, Quebec, Canada, July 27-31, 1986