Symbiotic nitrogen fixation. Proceedings of the 14th North American conference, St. Paul, Minnesota, July 1993

This volume contains 23 edited papers, the first 15 which are reprinted from Plant & Soil 161(1): evolution and diversity in the legume-Rhizobium symbiosis - chaos theory?* (abstracted previously); developments in Rhizobium taxonomy*; host range/antigenic relationships between Rhizobium fredii strains and Rhizobium sp.*; rapid identification of Rhizobium species*; ammonium sensing in nitrogen fixing bacteria*; regulation of nodulin gene expression*; synthesis, release, and transmission of alfalfa signals to rhizobial symbionts*; role of lipo-oligosaccharides in root nodule formation*; sucrose transport/hydrolysis in R. tropici*; shoot/root assimilate allocation/nodulation of Vigna unguiculata seedings*; N-acetylglutaminylglutamine amide production in R. meliloti*; nitrogenase activity regulation in forage legume nodules after defoliation*; nodulation and nitrogen fixation in extreme environments* (abstracted previously); regulation of legume inoculants in Canada*; developments in the actinorhizal symbioses*; characterization of Bradyrhizobium japonicium chromosomal genes; characterization of R. galegae by REP-PCR, PFGE and 16S rRNA sequencing; the role of malic enzyme in symbiotic nitrogen fixation; eastern Canadian soybean field trials of rhizobial strain NS 1; efficiency of cold-adapted rhizobia; survival of B. japonicium in pig slurry used as a carrier for soil inoculation; plasmid DNA content of agronomically important Rhizobium species; and FAO/IAEA programmes on nitrogen fixation. -S.R.Harris