Laplaze Laurent, Duhoux Emile, Franche Claudine, Frutz Thierry, Svistoonoff Sergio, Bisseling T., Bogusz Didier, Pawlowski K. (2000). Casuarina glauca prenodule cells display the same differentiation as the corresponding nodule cells. Molecular Plant-Microbe Interactions, 13 (1), p. 107-112. ISSN 0894-0282.
Titre du document
Casuarina glauca prenodule cells display the same differentiation as the corresponding nodule cells
Année de publication
2000
Auteurs
Laplaze Laurent, Duhoux Emile, Franche Claudine, Frutz Thierry, Svistoonoff Sergio, Bisseling T., Bogusz Didier, Pawlowski K.
Source
Molecular Plant-Microbe Interactions, 2000,
13 (1), p. 107-112 ISSN 0894-0282
Recent phylogenetic studies have implied that all plants able to enter root nodule symbioses with nitrogen-fixing bacteria go back to a common ancestor (D.E. Soltis, P.S. Soltis, D.R. Morgan, S.M. Swensen, B.C. Mullin, J.M. Dowd, and P.G. Martin, Proc. Natl. Acad. Sci. USA, 92:2647-2651, 1995). However, nodules formed by plants from different groups are distinct in nodule organogenesis and structure. In most groups, nodule organogenesis involves the induction of cortical cell divisions. In legumes these divisions lead to the formation of a nodule primordium, while in non-legumes they lead to the formation of a so-called prenodule consisting of infected and un-infected cells. Nodule primordium formation does not involve prenodule cells, and the function of prenodules is not known. Here, we examine the differentiation of actinorhizal prenodule cells in comparison to nodule cells with regard to both symbionts. Our findings indicate that prenodules represent primitive symbiotic organs whose cell types display the same characteristics as their nodule counterparts. The results are discussed in the context of the evolution of root nodule symbioses. (Résumé d'auteur)
Plan de classement
Mycorhizes [084SYMBIO03]
Descripteurs
MYCORHIZE ; NODULE RACINAIRE ; DIFFERENCIATION ; SYMBIOSE ; EVOLUTION ; FIXATION BIOLOGIQUE DE L'AZOTE ; PHYLOGENIE ; ANALYSE GENETIQUE ; PLANTE TRANSGENIQUE
Localisation
Fonds IRD [F B010020686]
Identifiant IRD
fdi:010020686
