Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes
| Autor: | Grégory Mouille, Nero Borrega, Herman Höfte, José Manuel Pérez-Pérez, Silvia Rubio-Díaz, Pedro Robles, Rafael Muñoz-Viana, María Rosa Ponce, Rebeca González-Bayón, Diana Hernández-Romero, José Luis Micol |
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| Přispěvatelé: | Inst Bioingn, Universidad Miguel Hernández [Elche] (UMH), Institut Jean-Pierre Bourgin (IJPB), Institut National de la Recherche Agronomique (INRA)-AgroParisTech, Ministerio de Ciencia e Innovacion of Spain [BFU2011-22825, CSD2007-00057 (TRANSPLANTA)], Generalitat Valenciana [PROMETEO/2009/112], European Commission [LSHG-CT-2006-037704 (AGRON-OMICS)] |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
0106 biological sciences
[SDV]Life Sciences [q-bio] Turgor pressure Arabidopsis Plant Science medicine.disease_cause Plant Genetics 01 natural sciences Cell Wall Gene Expression Regulation Plant Morphogenesis Plant Genomics Plant Growth and Development 0303 health sciences Mutation Multidisciplinary Plant Stems SIZE CONTROL WALL CELLULOSE SYNTHESIS Cell biology LEAF DEVELOPMENT Glucosyltransferases Plant Physiology Medicine Research Article Arabidopsis Thaliana Plant Cell Biology Science Mitosis Biology Plant Morphology ENDOREDUPLICATION Cell wall 03 medical and health sciences Model Organisms Plant and Algal Models Osmotic Pressure Xylem Cellulose synthase complex medicine Genetics LEAVES PLANT ARABIDOPSIS-THALIANA MUTANTS IDENTIFICATION 030304 developmental biology Cell Proliferation Growth Control Water transport Cell growth Arabidopsis Proteins Botany Water Plant cell Plant Leaves Plant Biotechnology Plant Cell Wall 010606 plant biology & botany Developmental Biology |
| Zdroj: | Plos One 5 (7), . (2012) PLoS ONE PLoS ONE, Public Library of Science, 2012, 7 (5), ⟨10.1371/journal.pone.0036500⟩ PLoS ONE, Vol 7, Iss 5, p e36500 (2012) |
| ISSN: | 1932-6203 |
| DOI: | 10.1371/journal.pone.0036500⟩ |
| Popis: | Organ growth depends on two distinct, yet integrated, processes: cell proliferation and post-mitotic cell expansion. Although the regulatory networks of plant cell proliferation during organ growth have begun to be unveiled, the mechanisms regulating post-mitotic cell growth remain mostly unknown. Here, we report the characterization of three EXIGUA (EXI) genes that encode different subunits of the cellulose synthase complex specifically required for secondary cell wall formation. Despite this highly specific role of EXI genes, all the cells within the leaf, even those that do not have secondary walls, display small sizes in the exi mutants. In addition, we found a positive correlation between cell size and the DNA ploidy levels in exi mutant leaves, suggesting that both processes share some regulatory components. Our results are consistent with the hypothesis that the collapsed xylem vessels of the exi mutants hamper water transport throughout the plant, which, in turn, limits the turgor pressure levels required for normal post-mitotic cell expansion during leaf growth. |
| Databáze: | OpenAIRE |
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