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. 2019 Jan 25;14(1):e0209973. doi: 10.1371/journal.pone.0209973

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© 2019 Coutand 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 credited.

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Fig 5 — A: Case of oak seedling subjected to tilting in an isotropic environment: the stem stabilized with the top of the stem back to the vertical. B: Case of oak seedling subjected to tilting in an anisotropic light environment and for which an annual shoot elongated during treatment: the stem stabilized towards light. C: Case of oak seedling subjected to tilting in an anisotropic light environment and for which no annual shoot elongated during treatment: the stem uprighted itself and stabilized around the vertical position.