Molecular basis of symbiosis between Rhizobium and legumes

Christoph Freiberg, Rémy Fellay, Amos Bairoch, William J. Broughton, André Rosenthal and Xavier Perret
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Christoph Freiberg: Insitut für Molekulare Biotechnologie, Abteilung Genomanalyse
Rémy Fellay: Insitut für Molekulare Biotechnologie, Abteilung Genomanalyse
Amos Bairoch: Insitut für Molekulare Biotechnologie, Abteilung Genomanalyse
William J. Broughton: Insitut für Molekulare Biotechnologie, Abteilung Genomanalyse
André Rosenthal: Insitut für Molekulare Biotechnologie, Abteilung Genomanalyse
Xavier Perret: Insitut für Molekulare Biotechnologie, Abteilung Genomanalyse

Nature, 1997, vol. 387, issue 6631, 394-401

Abstract: Abstract Access to mineral nitrogen often limits plant growth, and so symbiotic relationships have evolved between plants and a variety of nitrogen-fixing organisms. These associations are responsible for reducing 120 million tonnes of atmospheric nitrogen to ammonia each year. In agriculture, independence from nitrogenous fertilizers expands crop production and minimizes pollution ot water tables, lakes and rivers. Here we present the complete nucleotide sequence and gene complement of the plasmid from Rhizobium sp. NGR234 that endows the bacterium with the ability to associate symbolically with leguminous plants. In conjunction with transcriptional analyses, these data demonstrate the presence of new symbiotic loci and signalling mechanisms. The sequence and organization of genes involved in replication and conjugal transfer are similar to those of Agrobacterium, suggesting a recent lateral transfer of genetic information.

Date: 1997
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DOI: 10.1038/387394a0

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