Preface. Nitrogen Fixation and the Biosphere; W.E. Newton. Genetic and Metabolic Engineering of Rhizobium Etli to Modify (Enhance) Nitrogen Fixation in the Symbiosis with Phaseolus vulgaris; J. Mora. Modulation of Key Symbiotic Metabolic Pathways Through Reverse Genetics of Transgenic Legumes; G. Hernandez, et al. Constitutive and Nodule-specific Over-expression of Cytosolic Glutamine Synthetase (GS1) Genes in Alfalfa; J.L. Ortega, et al. Cloning and Developmental Expression of a Nodule Enhanced Sucrose Synthase cDNA from Alfalfa; D.L. Robinson, et al. Alanine and Ammonia Release by N2-fixing Bradyrhizobium japonicum Bacteroids; J.K. Waters, et al. Is Bacteroid a-Ketoglutarate Dehydrogenase needed for Nitrogen Fixation? L.S. Green, D.W. Emerich. Hopanoid Lipid Content of Bradyrhizobium Bacteria is dependent on Culture Conditions; E.L. Kannenberg, et al. Phosphate Metabolism in Rhizobium: Issues, Contrasts, and Comparisons; T.R. Mcdermott. Recent Advances in the Physiology of Drought Stress Effects on Symbiotic N2 Fixation in Soybean; R. Serraj, et al. Rhizobium meliloti Lon Protease Plays an Essential Role in Alfalfa Symbiosis; M.L. Summers, T.R. Mcdermott. Flavonoid Enhancement of Sorghum Root Development; K.J. O'Callaghan, et al. Analysis of Factors Affecting Competition for Nodulation of Legumes by Rhizobium leguminosarum; M.F. Hynes, et al. Characterization of Rhizobia Associated with Dalea spp. in Natural Prairies and Revegetation Areas in Minnesota; P.H. Graham, et al. Distribution and Characteristics of Bradyrhizobium spp. Nodulating African Soybeans; R. Abaidoo, et al. What does Strain Persistence Really Mean? J.E. Thies, et al. Isolation and Characterization of a DNA Fragment Containing Genes for Mimosine Degradation from Rhizobium sp. Strain TAL1145; D. Borthakur, M. Soedarjo. Sinorhizobium meliloti Products Increase Carbon Metabolism in Alfalfa; D.A. Phillips, et al. Ecology and Plant Growth-Promoting Activities of the Natural Association Between Rhizobium leguminosarum bv. Trifolii and Rice Roots; F.B. Dazzo, et al. Bacteriocins of Rhizobium leguminosarum: a Molecular Analysis; S. Twelker, et al. Suppression of Plant Defence in the Medicago sativa (Alfalfa)-Sinorhizobium meliloti Symbiosis; K. Niehaus, et al. Unique Aspects of Nod Gene Expression in Bradyrhizobium japonicum; J. Loh, et al. Control of Root Nodule Initiation in Medicago; A. Kondorosi, et al. Differential Expression of Symbiosis-Related Genes in Yellow Lupine; M.M. Sikorski, et al. An Isoflavone from Soybean Roots Induces Sinorhizobium fredii Strain USDA257 to Produce Pilus-Like Surface Appendages; S.G. Pueppke, et al. Rhizobium etli (Re) Lipopolysaccharide (LPS) Structure: Comparison with the LPSs from Rhizobium leguminosarum (RL) and Related Rhizobium Strains; R.W. Carlson, et al. Two different Signal Peptidases and Their Possible Roles in the Biphasic Life Cycle of Bradyrhizobium japonicum; P. Muller, et al. Xylem Colonization of Sesbania rostrata by Azorhizobium caulinodans ORS 575; K.J. O'Callaghan, et al. Extracellular Calcium Flux in Root Hairs Responding to Nodulation Factors; L. Cardenas, et al. Use of T-DNA Tagging to Identify Plant Genes Involved in Symbiotic Nitrogen Fixation; L. Skot, et al. Physical and Genetic Organisation of pNGR234a; X. Perret, et al. The Symbiotic Plasmid of Rhizobium etli; J.G. Davila, et al. The Dynamic Genome of Rhizobium: Addressing Some Basic Questions; D. Romero, et al. Functional Genomics of Legumes: Map-Based Cloning and Gene Trapping Advances in Soybean and Lotus japonicum; P.M. Gresshoff, et al. Cloning Defined Regions of the pExo Megaplasmid of Rhizobium (Sinorhizobium) meliloti: an In Vivo Recombination Technique; P.S.G. Chain, et al. Cloning and Identification of Mobilizable DNA Regions in Rhizobium meliloti; J.A. Herrera-Cervera, et al. Heterocyst Differentiation and Nitrogen Fixation in the Cyanobacterium Anabaena; R. Haselkorn, et al. Integration of Regulatory Networks for Different Physiological Functions in Bradyrhizobium japonicum; H.M. Fischer, et al. Mode of Action of the FixT repressor protein of Sinorhizobium meliloti; A.-M. Garnerone, et al. The PII Protein of Herbaspirillum seropedicae: Structure, Kinetic Properties and Role in the Regulation of Nitrogen Fixation; E.M. Benelli, et al. PII and GlnK Control Ammonia Assimilation and Nitrogen in Azorhizobium caulinodans; N. Michel-Reydellet, et al. Symbiotic Terminal Oxidase cbb3 Production is Negatively Modulated by a Purine Related Metabolite in Sinorhizobium meliloti; M. Soberon, et al. Analysis of Nitrogen Fixation and Regulatory Genes in the Sugarcane Endophyte Acetobacter diazotrophicus; S. Lee, et al. Agricultural and Environmental Applications of Nitrogen Fixing Organisms; M.J. Sadowsky, P.H. Graham. Antibiosis as a Means to Enhance Nodulation Competitiveness by Rhizobium inoculum Strains under Agricultural Conditions; E.W. Triplett. Bioassays for Soil Contamination Using the Legume Root Nodule Symbiosis; D. Werner, et al. Novel Polysaccharide Produced by Bradyrhizobium japonicum Enhances Competitiveness at high pH and Ca; J.G. Streeter. Effects of Drought Stress on Growth and Nitrogen Assimilation by Common Beans; Relation with the Nitrogen Nutrition Way; A.R. Lodeiro, et al. Influence of Soil Chemical Characteristics on Medic Rhizobia in the Alkaline Soils of South Eastern Australia; J.F. Slattery, et al. Characterization of New Efficient and Competitive Strains for the Bean (Phaseolus vulgaris L.) Crop in Brazil; M. Hungria, et al. Field Inoculation of Common Bean (Phaseolus vulgaris L.) with High Efficiency Rhizobium Strains: Nodule Occupancy; P.A. Burgos, et al. Does Inoculant Formulation Affect the Population Dynamics of Rhizobium in the Rhizosphere of Pea? D.C. Jans-Hammermeister, et al. rRNA Based Phylogeny and Identification: the Impacts on Bacterial Taxonomy; W. Ludwig, et al. Some Issues of Relevance in the Taxonomy of Rhizobia; P. van Berkum, et al. Polyphasic Taxonomy of Nitrogen-Fixing Acetic Bacteria Isolated from the Rhizosphere of Coffee Plant; J. Caballero-Mellado, et al. Characterization of Bradyrhizobium spp. Strains by RFLP Analysis of Amplified 16S rDNA and rDNA Intergenic Spacer Regions; P. Vinuesa, et al. Genotypic Characterization of Bradyrhizobia from Small Legumes by rDNA PCR-RFLP and AFLP Fingerprint Analyses; F. Doignon-Bourcier, et al. Genetic Diversity of Rhizobial Populations Nodulating Phaseolus vulgaris in Acid Soils from Brazil; D.S. Andrade, et al. Molecular Symbiotic Characterization of Rhizobia: Towards a Polyphasic Approach Using Nod Factors and Nod Genes? C. Boivin, E. Giraud. Index.