Franche Claudine auteur aut IRD Lindstrom K. auteur aut IRD Elmerich C. auteur aut IRD text journalArticle eng text/pdf born digital access Nitrogen is generally considered one of the major limiting nutrients in plant growth. The biological process responsible for reduction of molecular nitrogen into ammonia is referred to as nitrogen fixation. A wide diversity of nitrogen-fixing bacterial species belonging to most phyla of the Bacteria domain have the capacity to colonize the rhizosphere and to interact with plants. Leguminous and actinorhizal plants can obtain their nitrogen by association with rhizobia or Frankia via differentiation on their respective host plants of a specialized organ, the root nodule. Other symbiotic associations involve heterocystous cyanobacteria, while increasing numbers of nitrogen-fixing species have been identified as colonizing the root surface and, in some cases, the root interior of a variety of cereal crops and pasture grasses. Basic and advanced aspects of these associations are covered in this review. specialized Nitrogen fixation Symbiosis Rhizobia Frankia Cyanobacteria Azospirillum 076 084 321 1-2 35-59 2009 0032-079X https://www.documentation.ird.fr/hor/fdi:010046253 10.1007/s11104-008-9833-8 0032-079X [F B010046253] https://www.documentation.ird.fr/hor/fdi:010046253 https://www.documentation.ird.fr/intranet/publi/2009/08/010046253.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-09-01 2017-08-23 fdi:010046253 fre