Nitrogen Fixation with Non-Legumes

Session 1: Biology of interactions between plants and diazotrophic bacteria.- Development and function of Azospirillum-inoculated roots.- Lichens to Gunnera - with emphasis on Azolla.- Establishment of inoculated Azospirillum spp. in the rhizosphere and in roots of field grown wheat and sorghum.- Effects of oxygen partial pressure and combined nitrogen on N2-fixation (C2H2) associated with Zea mays and other gramineous species.- Adhesion of fimbriated nitrogen-fixing enteric bacteria to roots of grasses and cereals.- Session 2: Microbial ecology of diazotrophic bacteria.- Ecological factors, and adaptive processes in N2-fixing bacterial populations of the plant environment.- Nitrogen fixation associated with roots of Kallar grass (Leptochloa fusca (L.) Kunth).- Growth and survival of Azospirillum brasilense and Arthrobacter giacomelloi in binary continuous culture.- Population dynamics of Azospirillum brasilense and its bacteriophage in soil.- Chemotaxis of free-living nitrogen-fixing bacteria towards maize mucilage.- Utilization of simple phenolics for dinitrogen fixation by soil diazotrophic bacteria.- Enrichment of diazotrophic bacteria from rice soil in continuous culture.- Session 3: Biochemistry and physiology of nitrogen fixation.- Biochemistry and physiology of nitrogen fixation with particular emphasis on nitrogen-fixing phototrophs.- Aspects of nitrogen fixation and denitrification by Azospirillum.- Studies of the adenylate and pyridine nucleotide pools during nitrogenase 'switch-off' in Rhodospirillum rubrum.- Shifts in the intracellular ATP pools of immobilized Nostoc cells (Cyanobacteria) induced by water stress.- Session 4: Genetics of nitrogen fixation.- Regulation of the nitrogen fixation genes in Klebsiella pneumoniae: Implications for genetic manipulation.- Cloning of pEA3, a large plasmid of Enterobacter agglomerans containing nitrogenase structural genes.- Session 5: Methods of measuring nitrogen fixation.- The role of root-associated Klebsiella pneumoniae in the nitrogen nutrition of Poa pratensis and Triticum aestivum as estimated by the method of 15N isotope dilution.- Use of isotope dilution to measure nitrogen fixation associated with the roots of sorghum and millet genotypes.- Estimation of biological nitrogen fixation associated with Brachiaria and Paspalum grasses using 15N labelled organic matter and fertilizer.- Evaluation of the availability of Azolla-N and urea-N to rice using 15N.- Session 6: Nitrogen fixation by non-legumes in agriculture.- Nitrogen fixation associated with non-legumes in agriculture.- Effect of Azosprillium inoculation on nitrogen fixation and growth of several winter legumes.- Nitrogen fixation by non-legumes in tropical agriculture with special reference to wetland rice.- Laboratory acetylene reduction assay for relative measurement of N2-fixing activities associated with field-grown wetland rice plants.- Effect of seed inoculation, mycorrhizal infection and organic amendment on wheat growth.- Effect of incorporation of crop residues on development of diazotrophs and patterns of acetylene-reducing activity in Nile Valley soils.- Session 7: Nitrogen fixation by non-legumes in forestry and natural ecosystems.- The improvement and utilization in forestry of nitrogen fixation by actinorhizal plants with special reference to Alnus in Scotland.- Distribution of Frankia in soils from forest and afforestation sites in northern Sweden.- Nitrogen fixation in coniferous bark litter.- Closing session.- The genetics of actinorhizal Frankia: A review.- Titles of posters presented at the meeting.- Videotape presentation (Session 2).- Index of keywords.