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Legumes Symbioses: Absence of Nod Genes in Photosynthetic Bradyrhizobia
Abstract
Leguminous plants (such as peas and soybeans) and rhizobial soil bacteria are symbiotic partners that communicate through molecular signaling pathways, resulting in the formation of nodules on legume roots and occasionally stems that house nitrogen-fixing bacteria. Nodule formation has been assumed to be exclusively initiated by the binding of bacterial, host-specific lipochito-oligosaccharidic Nod factors, encoded by the nodABC genes, to kinase-like receptors of the plant. Here we show by complete genome sequencing of two symbiotic, photosynthetic, Bradyrhizobium strains, BTAi1 and ORS278, that canonical nodABC genes and typical lipochito-oligosaccharidic Nod factors are not required for symbiosis in some legumes. Mutational analyses indicated that these unique rhizobia use an alternative pathway to initiate symbioses, where a purine derivative may play a key role in triggering nodule formation.
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Cited by
The roots of a new green revolution
Herder, G. D., Van Isterdael, G., Beeckman, T., & De Smet, I. (2010) · Trends in Plant Science · doi:10.1016/j.tplants.2010.08.009 · Cited by 508
Legume-Nodulating Betaproteobacteria: Diversity, Host Range, and Future Prospects
Gyaneshwar, P., Hirsch, A. M., Moulin, L., Chen, W.-M., Elliott, G. N., Bontemps, C., Estrada-de los Santos, P., Gross, E., dos Reis, F. B., Sprent, J. I., et al. (2011) · Molecular Plant-Microbe Interactions® · doi:10.1094/mpmi-06-11-0172 · Cited by 401
Self-citationCassán, F., Perrig, D., Sgroy, V., Masciarelli, O., Penna, C., & Luna, V. (2009) · European Journal of Soil Biology · doi:10.1016/j.ejsobi.2008.08.005 · Cited by 389
Legume growth-promoting rhizobia: An overview on the Mesorhizobium genus
Laranjo, M., Alexandre, A., & Oliveira, S. (2014) · Microbiological Research · doi:10.1016/j.micres.2013.09.012 · Cited by 326
Wang, Q., Quensen, J. F., Fish, J. A., Kwon Lee, T., Sun, Y., Tiedje, J. M., & Cole, J. R. (2013) · mBio · doi:10.1128/mbio.00592-13 · Cited by 323
Metadata
- Authors
- Giraud, E., Moulin, L., Vallenet, D., Barbe, V., Cytryn, E., Avarre, J.-C., Jaubert, M., Simon, D., Cartieaux, F., Prin, Y., Bena, G., Hannibal, L., Fardoux, J., Kojadinovic, M., Vuillet, L., Lajus, A., Cruveiller, S., Rouy, Z., Mangenot, S., Segurens, B., Dossat, C., Franck, W. L., Chang, W.-S., Saunders, E., Bruce, D., Richardson, P., Normand, P., Dreyfus, B., Pignol, D., Stacey, G., Emerich, D., Verméglio, A., Médigue, C., & Sadowsky, M.
- Venue
- Science
- Published
- 2007-06
- Volume
- 316
- Issue
- 5829
- Pages
- 1307-1312
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2171776117
- Cited by
- 618
- References
- 0
- FWCI
- 51.21
- Type
- journal article
- Language
- en
- Open access
- closed
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- Giraud, E., Moulin, L., Vallenet, D., Barbe, V., Cytryn, E., Avarre, J.-C., Jaubert, M., Simon, D., Cartieaux, F., Prin, Y., Bena, G., Hannibal, L., Fardoux, J., Kojadinovic, M., Vuillet, L., Lajus, A., Cruveiller, S., Rouy, Z., Mangenot, S., . . . Sadowsky, M. (2007). Legumes Symbioses: Absence of Nod Genes in Photosynthetic Bradyrhizobia. Science. https://doi.org/10.1126/science.1139548
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