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Nitrogen Fixation: From Molecules to Crop Productivity: Proceedings of the 12th International Congress on Nitrogen Fixation, Foz do Iguacu, Parana, Brazil, September 12-17, 1999


Series: Current Plant Science & Biotechnology in Agriculture Volume: 38

Edited By: FO Pedrosa, M Hungria, G Yates and WE Newton


Hardback | Dec 2000 | #109420 | ISBN: 0792362330
Availability: Usually dispatched within 1 week Details
NHBS Price: £380.00 $489/€416 approx

About this book

Bringing together the diverse disciplines that study nitrogen fixation, this book describes advances made in various fields: chemists are now studying FeMoco, the active site of nitrogenase in non-protein surroundings, and the crystal structure of the enzyme has been refined to 1.6 angstroms. Advances in the complex regulation of nitrogen metabolism and nitrogen fixation gene expression in the free-living, associative, endophytic, symbiotic and photosynthetic diazotrophs are detailed, as well as factors involved in the nodulation process and nodule metabolism in legumes. In recent years molecular techniques have expanded phylogenetic studies and genome sequencing. Extensive studies on biological nitrogen fixation in sustainable agriculture, particularly in the tropics, environmental stress on plants and microbes, rhizobial strain selection, methods of soil reclamation and newly discovered plant bacterial associations are described. Finally, the possible avenues of nitrogen fixation research in the coming century, including the expression of nitrogen fixation genes and the establishment of nitrogenase function in plant organelles, the prospects of developing nitrogen fixation in rice and the development of resistant transgenic legumes are explored. All these developments were discussed at the 21st International Congress on Nitrogen Fixation held at Foz do Iguassu, Parana State, Brazil, and are covered in these proceedings.


Keynote Lecture. Nitrogen fixation in perspective; W.E. Newton. Section I: Biochemistry and Chemistry. Chemistry and biochemistry of nitrogenase; B.E. Smith. The mechanism of molybdenum nitrogenase: An overview; B.K. Burgess. Roles for nucleotides in nitrogenase catalysis; L.C. Seefeldt, et al. Superoxide-dependent nitrogen fixation; C. Hofmann-Findeklee, et al. Chemistry and biochemistry of nitrogenase (Part 1); R.N.F. Thorneley, et al. A 1.6 A resolution x-ray crystallographic study of Klebsiella pneumoniae MoFe protein, Kp1; S.M. Mayer, et al. Roles of VnfX and NifX in FeV-co and FeMo-co synthesis in Azotobacter vinelandii; C. Ruttimann-Johnson, et al. Studies on the mechanism for the activiation of iron and sulfur for formation of the nitrogenase metal centers; D.R. Dean, et al. Stopped-flow infra-red spectroscopy of carbon monoxide binding to functioning nitrogenase; R.N.F. Thorneley, et al. Reductant-dependent ATP utilization during nitrogenase catalysis: Studies using Ti (III); A.C. Nyborg, et al. Cofactor reactivity and models for cofactor reactions; G.J. Leigh, R.L. Richards. Interactions of small molecules with isolated FeMoco; C.J. Pickett, et al. Catalytic reactions with FeMoco in non-enzymatic surroundings (comparison with synthetic catalysts); A.E. Shilov. Catalytic behavior of isolated FeMo-cofactor of nitrogenase in non-protein surroundings; T.A. Bazhenova, et al. Chemical nitrogen fixation: protonation of coordinated dinitrogen with coordinated dihydrogen or bridging hydrosulfido ligands; M. Hidai. Mo, V and Fe complexes of tripodal sulfur-donor ligands as models for nitrogenase active sites; S.C. Davies, et al. The use of chemicals models to probe the mechanisms of substrate reduction reactions of nitrogenases; C.A. Helleren, et al. Poster Summaries. Section II: Regulation of Nitrogen Fixation and Assimilation. Regulation of nif gene expression in free-living diazotrophs: recent advances; M.J. Merrick, et al. Activation of transcription by the sigma-54 RNA polymerase holoenzyme; M.-T. Gallegos, et al. New mechanisms of bacterial gene regulation in a nitrogen-fixing phototroph; R.G. Kranz, et al. Regulation of nitrogen fixation and glutamine synthetase in Herbaspirillum seropedicae; E.M. Souza, et al. Analysis of bacterial gene expression during the late stages of the interaction between Rhizobium etli CNPAF512 and Phaseolus vulgaris; J. Michiels, et al. Functional analysis of the Bradyrhizobium japonicum RegSR two-component regulatory proteins; R. Emmerich, et al. Role of Herbaspirillum seropedicae NifA domains on the expression of nif genes; R.A. Monteiro, et al. Characterization of an Azospirillum brasilense Tn5 mutant with enhanced nitrogen fixation; C.A.G. Blaha, et al. amtB is necessary for NH4+ induced nitrogenase swithc-off and ADP-ribosylation in Rhodobacter capculatus; A.F. Yakunin, P.C. Hallenbeck. Regulation of Azotobacter vinelandii NifA activity by NifL: Role of PII-like proteins in nitrogen sensing; F. Reyes-Ramirez, et al. Structural basis for signal transduction within the FixJ transcriptional activator; J. Schumacher, et al. Effect of redox status of dinitrogenase reductase on the regulation of nitrogenase activity by reversible ADP-ribosylation; C.M. Halbleib, et al. Heterotrimerization of PII-like signalling proteins: Lessons from a comparative analysis between a cyanobacterial PII homologue and its proteobacterial counterparts; K. Forchhammer. Role of PII protein as a signal of nitrogen level in Herbaspirillum seropedicae; E.M. Benelli, et al. Poster Summaries. Genetics of nitrogen fixation in Rhodobacter capsulatus: Ammonium and molybdenum control of both nitrogenase systems; W. Klipp, et al. Electron transport pathway to nitrogenase in Rhodobacter capsulatus: Rnf complex and its relatives in non-diazotrophs; K. Saeki, H. Kumagai. Photosynthesis in Aeschynomene Bradyrhizobium sp. ORS278: Genetic analysis and role in symbiosis; E. Giraud, et al. The concerted action of hydrogenases and nitrogenases in cyanobacteria; H. Bothe, et al. Heterocyst pattern controlled by an inhibitory peptide in Anabaena; H.-S. Yoon, J.W. Golden. The element nitrogen in the philatelic world; H. Bothe. Section III: Taxonomy and Evolution of Diazotrophs. Taxonomy and evoluation of diazotrophs; J.P.W. Young. Ecological, phylogenetic and taxonomic remarks on diazotrophs and related genera; E. Martinez Romero, et al. Molecular evolution in diazotrophs: Do the genes agree?; J.P.W. Young. Phylogeny of Rhizobia; P. van Berkum, et al. Genetics of Nostoc in relation to host plant species; U. Rasmussen, M.M. Svenning. Origin and evolution of nif genes; R. Fani, et al. Characterization of nitrogen-fixing bacteria containing molybdenum-independent nitrogenases from diverse natural environments; D. Betancourt, et al. Biodiversity of rhizobia from a wide range of forest Leguminosae species in Brazil; F.M.S. Moreira. Biodiversity and selection of Sinorhizobium fredii strains for soybean inoculants; D.N. Rodriguez-Navarro, et al. Taxonomy of the family Acetobacteraceae; L.E. Fuentes-Ramirez, et al. Diversity in the bean nodulating rhizobial population of northwetst Argentina; O.M. Aguilar, M.V. Lopez. Poster Summaries. Section IV: Legume symbiosis. Control of nodulation in leguma symbiosis; G. Stacey. Perception of lipo-chitooligosaccharidic Nod factors in the legume-rhizobia symbiosis: Studies on Medicago nod factor-binding sites; J.-J. Bono, et al. The use of GFP to study factors involved in the Lotus japonicus symbiosis; H.P. Spaink, et al. Cell cycle control in root nodule organogenesis; A. Kondorosi, et al. Nod factor reception; G. Stacey, et al. Functional characterization of a Kruppel-like zinc finger gene induced during nodule development; F. Frugier, et al. Suppression of plant defence reactions in alfalfa cell structures by Sinorhizobium meliloti surface carbohydrates; K. Niehaus, et al. Invasion of alfalfa root nodules by the nitrogen-fixing bacterium Rhizobium meliloti; G.R.O. Campbell, et al. Structure and development of inection threads; N.J. Brewin, et al. Unusual LPS structural features and symbiotic function; R.W. Carlson, et al. Two Bradyrhizobium japonicum genes encoding putative sensor proteins; P. Muller, E. Muhlencoert. Poster Summaries. Additional Articles. Author Index.

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