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<title lang=en>Mechanical stimuli regulate the allocation of biomass in trees: Demonstration with young[i] Prunus avium[/i] trees</title>
<creator>Coutand, Catherine</creator>
<creator>Dupraz, Christian</creator>
<creator>Jaouen, Gaëlle</creator>
<creator>Ploquin, Stéphane</creator>
<creator>Adam, Boris, </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>Fonctionnement et conduite des systèmes de culture tropicaux et méditerranéens (SYSTEM) ; Institut National de la Recherche Agronomique (INRA) - Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro) - Centre de Coopération Internationale en Recherche Agronomique pour le Développement (CIRAD) - Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro)</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>
<description>Publication Inra prise en compte dans l'analyse bibliométrique des publications scientifiques mondiales sur les Fruits, les Légumes et la Pomme de terre. Période 2000-2012. http://prodinra.inra.fr/record/256699</description>
<source>ISSN: 0305-7364</source>
<source>EISSN: 1095-8290</source>
<source>Annals of Botany</source>
<publisher>Oxford University Press (OUP)</publisher>
<identifier>hal-01032056</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01032056</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01032056</source>
<source>Annals of Botany, Oxford University Press (OUP), 2008, 101 (9), pp.1421-1432. 〈10.1093/aob/mcn054〉</source>
<identifier>DOI : 10.1093/aob/mcn054</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1093/aob/mcn054</relation>
<language>en</language>
<subject lang=en>GROWTH</subject>
<subject lang=en>MECHANICAL STRESS</subject>
<subject lang=en>BENDING</subject>
<subject lang=en>BIOMASS</subject>
<subject lang=en>SHOOT/ROOT RATIO</subject>
<subject lang=en>WIND</subject>
<subject lang=en>SHELTER</subject>
<subject lang=en>MERISIER</subject>
<subject>[SDV.BV.BOT] Life Sciences [q-bio]/Vegetal Biology/Botanics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Background and Aims Plastic tree-shelters are increasingly used to protect tree seedlings against browsing animals and herbicide drifts. The biomass allocation in young seedlings of deciduous trees is highly disturbed by common plastic tree-shelters, resulting in poor root systems and reduced diameter growth of the trunk. The shelters have been improved by creating chimney-effect ventilation with holes drilled at the bottom, resulting in stimulated trunk diameter growth, but the root deficit has remained unchanged. An experiment was set up to elucidate the mechanisms behind the poor root growth of sheltered Prunus avium trees. Methods Tree seedlings were grown either in natural windy conditions or in tree-shelters. Mechanical wind stimuli were suppressed in ten unsheltered trees by staking. Mechanical stimuli (bending) of the stem were applied in ten sheltered trees using an original mechanical device. Key Results Sheltered trees suffered from poor root growth, but sheltered bent trees largely recovered, showing that mechano-sensing is an important mechanism governing C allocation and the shoot-root balance. The use of a few artificial mechanical stimuli increased the biomass allocation towards the roots, as did natural wind sway. It was demonstrated that there was an acclimation of plants to the imposed strain. Conclusions This study suggests that if mechanical stimuli are used to control plant growth, they should be applied at low frequency in order to be most effective. The impact on the functional equilibrium hypothesis that is used in many tree growth models is discussed. The consequence of the lack of mechanical stimuli should be incorporated in tree growth models when applied to environments protected from the wind (e.g. greenhouses, dense forests).</description>
<date>2008</date>
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