Multiscale integration of environmental stimuli in plant tropism produces complex behaviors.

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ID: 276604
2020
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Ranked #272 of 292 articles by views in Proceedings of the National Academy of Sciences of the United States of America

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Abstract
Plant tropism refers to the directed movement of an organ or organism in response to external stimuli. Typically, these stimuli induce hormone transport that triggers cell growth or deformation. In turn, these local cellular changes create mechanical forces on the plant tissue that are balanced by an overall deformation of the organ, hence changing its orientation with respect to the stimuli. This complex feedback mechanism takes place in a three-dimensional growing plant with varying stimuli depending on the environment. We model this multiscale process in filamentary organs for an arbitrary stimulus by explicitly linking hormone transport to local tissue deformation leading to the generation of mechanical forces and the deformation of the organ in three dimensions. We show, as examples, that the gravitropic, phototropic, nutational, and thigmotropic dynamic responses can be easily captured by this framework. Further, the integration of evolving stimuli and/or multiple contradictory stimuli can lead to complex behavior such as sun following, canopy escape, and plant twining.
Reference Key
moulton2020multiscaleproceedings Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Moulton, Derek E;Oliveri, Hadrien;Goriely, Alain;
Journal Proceedings of the National Academy of Sciences of the United States of America
Year 2020
DOI
10.1073/pnas.2016025117
URL
Keywords
mathematical model biomechanics morphoelasticity plant tropism rod theory

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