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Plant mechanical interactions with air and water

Mathematical Biology

Speaker: Emmanuel de Langre, Department of Mechanics, Ecole Polytechnique
Location: 2112 MSB
Start time: Fri, Feb 26 2010, 2:10PM

External flow, air or water, is a major abiotic stress on plants. It causes strong loads with complex static and dynamic component. A huge variety of configuration exists, depending on the plant geometry and the flow characteristics. In this seminar I will address three points (a) the difference between air and water loading, (b) the difference between static and dynamic interactions, (c) the coupling with growth. This will be illustrated by recent experimental and theoretical work on crop canopies (alfalfa and wheat), isolated trees (walnut and pine) and artificial plant systems.

[1] E. de Langre. Effects of wind on plants. Annual Review of Fluid Mechanics, 40:141-168. (2008).
[2] M. Rodriguez, E. de Langre and B. Moulia. A scaling law for the effects of architecture and allometry on tree vibration modes suggests a biological tuning to modal compartmentalization. American Journal of Botany, 95:1523-1557.(2008).
[3] F. Gosselin and E. de Langre. Destabilising Effects of Plant Flexibility in Air and Aquatic Vegetation Canopy Flows. European Journal of Mechanics B/Fluids, 28:271-282. (2009).