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. 2015 Mar 3;10(3):e0118238. doi: 10.1371/journal.pone.0118238

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© 2015 Feller et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Fig 6 — The sizes of the blue boxes represent auxin concentrations. In the left panel, the source i ₀ creates a linear vein within which the auxin concentration increases; auxin concentrations within the vein are higher than the background auxin level (A). In the right panel, the patterning process leads to a directed spanning tree rooted at the unique sink i ₀. The auxin concentration a _i inside each cell i is proportional to the inverse of the size of the sub-tree of rooted at i. Auxin concentrations thus decrease along the paths, leading to an auxin depleted zone in the neighbourhood of the sink i ₀.

Inline graphic — The sizes of the blue boxes represent auxin concentrations. In the left panel, the source i ₀ creates a linear vein within which the auxin concentration increases; auxin concentrations within the vein are higher than the background auxin level (A). In the right panel, the patterning process leads to a directed spanning tree rooted at the unique sink i ₀. The auxin concentration a _i inside each cell i is proportional to the inverse of the size of the sub-tree of rooted at i. Auxin concentrations thus decrease along the paths, leading to an auxin depleted zone in the neighbourhood of the sink i ₀.