title: Plant hormone cross-talk: the pivot of root growth.
abstract: Root indeterminate growth and its outstanding ability to produce new tissues continuously make this organ a highly dynamic structure able to respond promptly to external environmental stimuli. Developmental processes therefore need to be finely tuned, and hormonal cross-talk plays a pivotal role in the regulation of root growth. In contrast to what happens in animals, plant development is a post-embryonic process. A pool of stem cells, placed in a niche at the apex of the meristem, is a source of self-renewing cells that provides cells for tissue formation. During the first days post-germination, the meristem reaches its final size as a result of a balance between cell division and cell differentiation. A complex network of interactions between hormonal pathways co-ordinates such developmental inputs. In recent years, by means of molecular and computational approaches, many efforts have been made aiming to define the molecular components of these networks. In this review, we focus our attention on the molecular mechanisms at the basis of hormone cross-talk during root meristem size determination.
authors: Department of Biology and Biotechnology, Laboratory of Functional Genomics and Proteomics of Model Systems, University of Rome Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
authors: Elena
authors: E
authors: Pacifici
authors: Department of Biology and Biotechnology, Laboratory of Functional Genomics and Proteomics of Model Systems, University of Rome Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy.
authors: Laura
authors: L
authors: Polverari
authors: Department of Biology and Biotechnology, Laboratory of Functional Genomics and Proteomics of Model Systems, University of Rome Sapienza, Piazzale Aldo Moro 5, 00185 Rome, Italy sabrina.sabatini@uniroma1.it.
authors: Sabrina
authors: S
authors: Sabatini
mesh_terms: D002454:Cell Differentiation; D002455:Cell Division; D003583:Cytokinins / Q000378:metabolism; D018507:Gene Expression Regulation, Developmental; D018506:Gene Expression Regulation, Plant; D005875:Gibberellins / Q000378:metabolism; D007210:Indoleacetic Acids / Q000378:metabolism; D018519:Meristem / Q000235:genetics / Q000254:growth & development / Q000378:metabolism; D063245:Plant Development / Q000235:genetics*; D010937:Plant Growth Regulators / Q000378:metabolism*; D018517:Plant Roots / Q000235:genetics* / Q000254:growth & development / Q000378:metabolism; D010944:Plants / Q000235:genetics*; D015398:Signal Transduction; D055153:Stem Cell Niche
chemical_list: D003583:Cytokinins; D005875:Gibberellins; D007210:Indoleacetic Acids; D010937:Plant Growth Regulators
keywords: Auxin; cell differentiation; cell division; cytokinin; gibberellin; root meristem.