Botanical Ratchets

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dc.creatorKulić, I. M.
dc.creatorMani, M.
dc.creatorMohrbach, H.
dc.creatorThaokar, R.
dc.creatorMahadevan, L.
dc.date2008-06-23
dc.date.accessioned2026-07-07T09:46:22Z
dc.date.available2026-07-07T09:46:22Z
dc.descriptionRatcheting surfaces are a common motif in nature and appear in plant awns and grasses. They are known to profer selective advantages for seed dispersion and burial. In two simple model experiments we show that these anisotropically toothed surfaces naturally serve as motion rectifiers and generically move in a unidirectional manner when subjected to temporally and spatially symmetric excitations of various origins. Using a combination of theory and experiment we show that a linear relation between awn length and ratchet efficiency holds under biologically relevant conditions. Thus, grass awns efficiently transform non-equilibrium environmental stresses into useful work and directed motion using their length as a fluctuation amplifier, yielding a selective advantage to these organelles in many plant species.
dc.description4 pages, 3 figs
dc.identifierhttps://arxiv.org/abs/0806.3775
dc.identifierhttp://arxiv.org/abs/0806.3775
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/163505
dc.subjectSoft Condensed Matter
dc.titleBotanical Ratchets
dc.typetext

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