Nitrogen Fixation with Non-Legumes

Inhaltsverzeichnis

• Session 1: Mechanisms of infection of plants by N2-fixing microorganisms.
• Mechanisms of infection of plants by nitrogen fixing organisms.
• Session 2: Frankia and Parasponia symbiosis.
• Effective nodulation of Coriaria myrtifolia L. induced by Frankia strains from Alnus glutinosa L. (Gaertn.).
• Biology of the Parasponia-Bradyrhizobium symbiosis.
• Glasshouse evaluation of the growth of Alnus rubra and Alnus glutinosa on peat and acid brown earth soils when inoculated with four sources of Frankia.
• Ultrastructure of Frankia isolated from three Chilean shrubs (Rhamnaceae).
• Session 3: Azolla and cyanobacteria.
• Physiology and agronomy of Azolla-Anabaena symbiosis.
• Heterotrophic metabolism and diazotrophic growth of Nostoc sp. from Cycas circinalis.
• Light dependent nitrogen chlorosis in a heterocy stous cyanobacterium.
• Isolation and characterization of the N2-fixing symbiotic cyanobacterium Anabaena azollae.
• Bacteria in the Azolla-Anabaena symbiosis.
• New data on the Azolla-Anabaena symbiosis. I. Morphological and histochemical aspects.
• New data on the Azolla-Anabaena symbiosis. II. Cytochemical and immunocytochemical aspects.
• Session 4: Isolation and identification of plant-associated N2-fixing bacteria.
• Isolation and identification of root associated diazotrophs.
• Occurrence and survival of Azospirillum spp. in temperate regions.
• Klebsiella sp. NIAB-1: A new diazotroph, associated with roots of kallar grass from saline sodic soils.
• Session 5: Physiology of Azospirillum and other diazotrophs.
• Ecophysiological aspects of growth and nitrogen fixation in Azospirillum spp..
• The phytohormonal interactions between Azospirillum and wheat.
• Investigations on growth, nitrogen fixation and ammonium assimilation by a bacterium isolated from rice soil.
• Session 6: Geneticsof Azospirillum and other diazotrophs.
• Regulation of nif genes expression in Azospirillum brasilense and Herbaspirillum seropedicae.
• Homology between plasmids of Azospirillum brasilense and Azospirillum lipoferum.
• Self-transmissible nif-plasmids in Enterobacter.
• Identification of Bacillus azotofixans nitrogen fixation genes using heterologous nif probes.
• Isolation and properties of Azospirillum lipoferum and Azospirillum brasilense surface polysaccharide mutants.
• Session 7: Mechanisms of association of N2-fixing bacteria with grasses and cereals.
• Plant-bacteria interactions with special emphasis on the kallar grass association.
• Location of diazotrophs in the root interior with special attention to the kallar grass association.
• Field inoculation of sorghum and rice with Azospirillum spp. and Herbaspirillum seropedicae.
• Session 8: Mechanisms of response of cereal crops to Azospirillum inoculation.
• Involvement of IAA in the interaction between Azospirillum brasilense and Panicum miliaceum roots.
• Influence of inoculation with Azospirillum brasilense and Glomus fasciculatum on sorghum nutrition.
• Inoculation with associative N2-fixers in Egypt.
• Session 9: Quantification of plant-associated biological nitrogen fixation.
• Association between N2-fixing bacteria and pearl millet plants: Responses, mechanisms and persistence.
• Effect of inorganic N and organic fertilizers on nitrogen-fixing (acetylene-reducing) activity associated with wetland rice plants.
• Impact of soil environmental factors on rates of N2-fixation associated with roots on intact maize and sorghum plants.
• Session 10: Effects of plant genotype and environmental factors on plant-associated N2-fixation.
• Natural 15N abundance as a method of estimating the contribution of biologically fixed nitrogen to N2-fixing systems: Potential for non-legumes.
• Survival and colonization of inoculated bacteria in kallar grass rhizosphere and quantification of N2-fixation.
• Selection of sugar cane cultivars for associated biological nitrogen fixation using 15N-labelled soil.
• Occurrence of effective nitrogen-scavenging bacteria in the rhizosphere of kallar grass.
• General summary and conclusions.
• Titles of posters presented at the meeting.