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<title lang=en>Mechanosensing of stem bending and its interspecific variability in five neotropical rainforest species</title>
<creator>Coutand, Catherine</creator>
<creator>Chevolot, Malia</creator>
<creator>P. Rowe, Nick</creator>
<creator>Lacointe, André</creator>
<creator>Scotti, Ivan</creator>
<contributor>Laboratoire de Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier (PIAF) ; Institut National de la Recherche Agronomique (INRA) - Université Blaise Pascal - Clermont-Ferrand 2 (UBP)</contributor>
<contributor>Ecologie des forêts de Guyane (ECOFOG) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut National de la Recherche Agronomique (INRA) - Université des Antilles et de la Guyane (UAG) - AgroParisTech - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Botanique et Modélisation de l'Architecture des Plantes et des Végétations (UMR AMAP) ; Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut national de la recherche agronomique [Montpellier] (INRA Montpellier) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Institut de Recherche pour le Développement (IRD [France-Sud])</contributor>
<description>International audience</description>
<source>ISSN: 0305-7364</source>
<source>EISSN: 1095-8290</source>
<source>Annals of Botany</source>
<publisher>Oxford University Press (OUP)</publisher>
<identifier>halsde-00454145</identifier>
<identifier>https://hal.archives-ouvertes.fr/halsde-00454145</identifier>
<source>https://hal.archives-ouvertes.fr/halsde-00454145</source>
<source>Annals of Botany, Oxford University Press (OUP), 2010, 105 (2), pp.341-347. 〈10.1093/aob/mcp286〉</source>
<identifier>DOI : 10.1093/aob/mcp286</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcp286</relation>
<language>en</language>
<subject lang=en>Mechanosensing</subject>
<subject lang=en>Interspecific variability</subject>
<subject lang=en>Trees</subject>
<subject lang=en>Lianas</subject>
<subject lang=en>Rain forest</subject>
<subject lang=en>Neotropical species</subject>
<subject lang=en>Bending</subject>
<subject lang=en>Biomechanics</subject>
<subject lang=en>Bauhinia</subject>
<subject lang=en>Eperua</subject>
<subject lang=en>Symphonia</subject>
<subject lang=en>Tachigali</subject>
<subject>[SDE.BE.EVO] Environmental Sciences/Biodiversity and Ecology/domain_sde.be.evo</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Background and Aims: In rain forests, sapling survival is highly dependent on the regulation of trunk slenderness (height/diameter ratio): shade-intolerant species have to grow in height as fast as possible to reach the canopy but also have to withstand mechanical loadings (wind and their own weight) to avoid buckling. Recent studies suggest that mechanosensing is essential to control tree dimensions and stability-related morphogenesis. Differences in species slenderness have been observed among rainforest trees; the present study thus investigates whether species with different slenderness and growth habits exhibit differences in mechanosensitivity. Methods: Recent studies have led to a model of mechanosensing (sum-of-strains model) that predicts a quantitative relationship between the applied sum of longitudinal strains and the plant's responses in the case of a single bending. Saplings of five different neotropical species (Eperua falcata, E. grandiflora, Tachigali melinonii, Symphonia globulifera and Bauhinia guianensis) were subjected to a regimen of controlled mechanical loading phases (bending) alternating with still phases over a period of 2 months. Mechanical loading was controlled in terms of strains and the five species were subjected to the same range of sum of strains. The application of the sum-of-strain model led to a dose-response curve for each species. Dose-response curves were then compared between tested species. Key Results: The model of mechanosensing (sum-of-strain model) applied in the case of multiple bending as long as the bending frequency was low. A comparison of dose-response curves for each species demonstrated differences in the stimulus threshold, suggesting two groups of responses among the species. Interestingly, the liana species B. guianensis exhibited a higher threshold than other Leguminosae species tested. Conclusions: This study provides a conceptual framework to study variability in plant mechanosensing and demonstrated interspecific variability in mechanosensing.</description>
<date>2010</date>
<contributor>ANR-05-BDIV-0012, Woodiversity, Diversité des structures de bois et analyse biophysique des stratégies écologiques des ligneux en forêt tropicale humide(2005)</contributor>
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