Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes.
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. H...
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2012
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oai:doaj.org-article:9283941f77de492091acbe6e1ce0c2712021-11-18T07:19:32ZCell expansion-mediated organ growth is affected by mutations in three EXIGUA genes.1932-620310.1371/journal.pone.0036500https://doaj.org/article/9283941f77de492091acbe6e1ce0c2712012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22586475/?tool=EBIhttps://doaj.org/toc/1932-6203Organ 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.Silvia Rubio-DíazJosé Manuel Pérez-PérezRebeca González-BayónRafael Muñoz-VianaNero BorregaGregory MouilleDiana Hernández-RomeroPedro RoblesHerman HöfteMaría Rosa PonceJosé Luis MicolPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 5, p e36500 (2012) |
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Medicine R Science Q |
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Medicine R Science Q Silvia Rubio-Díaz José Manuel Pérez-Pérez Rebeca González-Bayón Rafael Muñoz-Viana Nero Borrega Gregory Mouille Diana Hernández-Romero Pedro Robles Herman Höfte María Rosa Ponce José Luis Micol Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes. |
| description |
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. |
| format |
article |
| author |
Silvia Rubio-Díaz José Manuel Pérez-Pérez Rebeca González-Bayón Rafael Muñoz-Viana Nero Borrega Gregory Mouille Diana Hernández-Romero Pedro Robles Herman Höfte María Rosa Ponce José Luis Micol |
| author_facet |
Silvia Rubio-Díaz José Manuel Pérez-Pérez Rebeca González-Bayón Rafael Muñoz-Viana Nero Borrega Gregory Mouille Diana Hernández-Romero Pedro Robles Herman Höfte María Rosa Ponce José Luis Micol |
| author_sort |
Silvia Rubio-Díaz |
| title |
Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes. |
| title_short |
Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes. |
| title_full |
Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes. |
| title_fullStr |
Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes. |
| title_full_unstemmed |
Cell expansion-mediated organ growth is affected by mutations in three EXIGUA genes. |
| title_sort |
cell expansion-mediated organ growth is affected by mutations in three exigua genes. |
| publisher |
Public Library of Science (PLoS) |
| publishDate |
2012 |
| url |
https://doaj.org/article/9283941f77de492091acbe6e1ce0c271 |
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