65 research outputs found
Role of Symbiotic Auxotrophy in the Rhizobium-Legume Symbioses
Symbiotic auxotrophy occurs in both determinate pea and indeterminate bean nodules demonstrating its importance for bacteroid formation and nodule function in legumes with different developmental programmes. However, only small quantities of branched chain amino acids are needed and symbiotic auxotrophy did not occur in the Sinorhizobium meliloti-alfalfa symbiosis under the conditions measured. The contrasting symbiotic phenotypes of aap bra mutants inoculated on different legumes probably reflects altered timing of amino acid availability, development of symbiotic auxotrophy and nodule developmental programmes
Fixation, accumulation, and distribution of nitrogen in a crop of Lupinus angustifolius cv. Unicrop
Analysis of R-primes demonstrates that genes for broad host range nodulation of Rhizobium strain NGR234 are dispersed on the Sym plasmid
Cloning of hemA from Rhizobium sp. NGR234 and symbiotic phenotype of a gene-directed mutant in diverse legume genera
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