Bedhomme M. auteur aut IRD Jouannic Stefan auteur aut IRD Champion Antony auteur aut IRD Simanis V. auteur aut IRD Henry Y. auteur aut IRD text journalArticle eng text/pdf born digital access In fission yeast, the onset of septation is signalled through the septum initiation network (SIN) signaling pathway. Similarly, in budding yeast the onset of budding is signalled through the mitotic exit network (MEN) pathway. We previously characterized in Arabidopsis signaling elements (GTPases, kinases) closely related to the core elements (spg 1p/TEM1p, cdc7p/CDC15p) of the SIN and MEN pathways. Our first results suggested that a plant signaling pathway must be used to coordinate mitotic exit with cytokinesis. This review questioned the value of such an hypothesis in a multicellular organism. The core elements (G-protein, kinase) of the SIN and MEN pathways were only detected in fungi, plants and Mycetozoa. We also noticed that AtSGP GTPase and AtMAP3Kepsilon kinase revealed two paralogues in Arabidopsis. Although Arabidopsis genes complement fission yeast mutants, and Arabidopsis proteins interact with fission yeast proteins, plants do not use these core elements to coordinate the termination of cell division with cytokinesis. Transcriptional regulation and expression data suggest a function for the plant SIN-like elements in the control of cell type specification. Exploring the evolutionary conservation of an ancient signaling pathway provides evidence that evolution has recycled regulatory elements for elaborating a new signaling avenue. specialized 076 020 46 1 1-10 2008 0981-9428 https://www.documentation.ird.fr/hor/fdi:010042480 10.1016/j.plaphy.2007.10.010 0981-9428 [F B010042480] https://www.documentation.ird.fr/hor/fdi:010042480 https://www.documentation.ird.fr/intranet/publi/2008/03/010042480.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2008-03-31 2017-08-23 fdi:010042480 fre