Regulatory Role of Cell Division Rules on Tissue Growth Heterogeneity

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Regulatory Role of Cell Division Rules on Tissue Growth Heterogeneity

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Title: Regulatory Role of Cell Division Rules on Tissue Growth Heterogeneity
Author: Alim, Karen; Hamant, Olivier; Boudaoud, Arezki

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Citation: Alim, Karen, Olivier Hamant, and Arezki Boudaoud. 2012. Regulatory role of cell division rules on tissue growth heterogeneity. Frontiers in Plant Science 3: 174.
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Abstract: The coordination of cell division and cell expansion are critical to normal development of tissues. In plants, cell wall mechanics and the there from arising cell shapes and mechanical stresses can regulate cell division and cell expansion and thereby tissue growth and morphology. Limited by experimental accessibility it remains unknown how cell division and expansion cooperatively affect tissue growth dynamics. Employing a cell-based two dimensional tissue simulation we investigate the regulatory role of a range of cell division rules on tissue growth dynamics and in particular on the spatial heterogeneity of growth. We find that random cell divisions only add noise to the growth and therefore increase growth heterogeneity, while cell divisions following the shortest new wall or along the direction of maximal mechanical stress reduce growth heterogeneity by actively enhancing the regulation of growth by mechanical stresses. Thus, we find that, beyond tissue geometry and topology, cell divisions affect the dynamics of growth, and that their signature is embedded in the statistics of tissue growth.
Published Version: doi:10.3389/fpls.2012.00174
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3414725/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:11726259
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