Metamaterial architecture from a self-shaping carnivorous plant

As meticulously observed and recorded by Darwin, the leaves of the carnivorous plant Drosera capensis L. slowly fold around insects trapped on their sticky surface in order to ensure their digestion. While the biochemical signaling driving leaf closure has been associated with plant growth hormones,...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2019-09, Vol.116 (38), p.18777-18782
Hauptverfasser: La Porta, Caterina A. M., Lionetti, Maria Chiara, Bonfanti, Silvia, Milan, Simone, Ferrario, Cinzia, Rayneau-Kirkhope, Daniel, Beretta, Mario, Hanifpour, Maryam, Fascio, Umberto, Ascagni, Miriam, De Paola, Larissa, Budrikis, Zoe, Schiavoni, Mario, Falletta, Ermelinda, Caselli, Alessandro, Chepizhko, Oleksandr, Tuissi, Ausonio, Vailati, Alberto, Zapperi, Stefano
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container_issue 38
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container_title Proceedings of the National Academy of Sciences - PNAS
container_volume 116
creator La Porta, Caterina A. M.
Lionetti, Maria Chiara
Bonfanti, Silvia
Milan, Simone
Ferrario, Cinzia
Rayneau-Kirkhope, Daniel
Beretta, Mario
Hanifpour, Maryam
Fascio, Umberto
Ascagni, Miriam
De Paola, Larissa
Budrikis, Zoe
Schiavoni, Mario
Falletta, Ermelinda
Caselli, Alessandro
Chepizhko, Oleksandr
Tuissi, Ausonio
Vailati, Alberto
Zapperi, Stefano
description As meticulously observed and recorded by Darwin, the leaves of the carnivorous plant Drosera capensis L. slowly fold around insects trapped on their sticky surface in order to ensure their digestion. While the biochemical signaling driving leaf closure has been associated with plant growth hormones, how mechanical forces actuate the process is still unknown. Here, we combine experimental tests of leaf mechanics with quantitative measurements of the leaf microstructure and biochemistry to demonstrate that the closure mechanism is programmed into the cellular architecture of D. capensis leaves, which converts a homogeneous biochemical signal into an asymmetric response. Inspired by the leaf closure mechanism, we devise and test a mechanical metamaterial, which curls under homogeneous mechanical stimuli. This kind of metamaterial could find possible applications as a component in soft robotics and provides an example of bioinspired design.
doi_str_mv 10.1073/pnas.1904984116
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subjects Architecture
Biochemistry
Biological Sciences
Biomechanical Phenomena
Biomimetic Materials - chemistry
Biomimetics
Cell Wall - physiology
Drosera - physiology
Elastic Modulus
Growth hormones
Hormones
Indoleacetic Acids - metabolism
Insects
Leaves
Mechanical stimuli
Menopause
Metamaterials
Movement
Physical Sciences
Plant growth
Plant Leaves - anatomy & histology
Plant Leaves - growth & development
Plant Leaves - metabolism
Plant Leaves - physiology
Plant Physiological Phenomena
Robotics
title Metamaterial architecture from a self-shaping carnivorous plant
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