Comptes Rendus
Measuring local and global vibration modes in model plants
Comptes Rendus. Mécanique, Volume 342 (2014) no. 1, pp. 1-7.

Model plants are extensively used in biological studies, and their mechanical behaviour needs to be better understood, in relation to studies in mechanoperception for instance. We present here the first approach to derive experimentally the modal parameters of two of these plants, Arabidopsis thaliana and Populus tremula × alba. A classical sinusoidal sweep excitation is used, with a measurement of displacements based on LKT optical flow tracking, followed by a bi-orthogonal decomposition (BOD). This allows us to estimate several modal frequencies for each plant, as well as the corresponding spatial localizations of deformation. Analyzing the modal frequencies, we show that global and local modes correspond to distinct ranges of frequencies and depend differently on plant size. Possible phenotyping applications are then discussed.

Published online:
DOI: 10.1016/j.crme.2013.10.010
Keywords: Vibration, Modes, Biomechanics, Image Correlation, Plants, Arabidopsis, Populus, BOD, LKT

Christelle Der Loughian 1, 2; Loïc Tadrist 1; Jean-Marc Allain 3; Julien Diener 1; Bruno Moulia 2; Emmanuel de Langre 1

1 Department of Mechanics, LadHyX, École polytechnique–CNRS, 91128 Palaiseau, France
2 INRA, PIAF, 63100 Clermont-Ferrand, France
3 Department of Mechanics, LMS, École polytechnique–CNRS, 91128 Palaiseau, France
     author = {Christelle Der Loughian and Lo{\"\i}c Tadrist and Jean-Marc Allain and Julien Diener and Bruno Moulia and Emmanuel de Langre},
     title = {Measuring local and global vibration modes in model plants},
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Christelle Der Loughian; Loïc Tadrist; Jean-Marc Allain; Julien Diener; Bruno Moulia; Emmanuel de Langre. Measuring local and global vibration modes in model plants. Comptes Rendus. Mécanique, Volume 342 (2014) no. 1, pp. 1-7. doi : 10.1016/j.crme.2013.10.010.

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