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. 2020 Jan 22;82(2):17. doi: 10.1007/s11538-019-00685-y

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© The Author(s) 2020

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 8 — PIN polarisation aligns with oriented cell growth. Numerical solution of model (1)–(4a) on a regular lattice of cells, starting from the same initial conditions as in Fig. 5, but with cells undergoing auxin-dependent, horizontal growth. a In the passage parameter regime oriented growth has no effect on the placement of cells within the passage and only shifts the PIN alignment from vertical to horizontal for five cells. b In the spot parameter regime oriented growth disturbs the formation of spots, halting the emergence of one and enlarging another, and shifts the PIN alignment from vertical to horizontal for 36 cells. All parameters are described in Appendix Tables 2 and 3. Cells are represented in the reference configuration (Color figure online)