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Smooth or with a Snap! Biomechanics of Trap Reopening in the Venus Flytrap (Dionaea muscipula)

Durak, Grażyna M. ; Thierer, Rebecca ; Sachse, Renate ; Bischoff, Manfred ; Speck, Thomas ; Poppinga, Simon (2022)
Smooth or with a Snap! Biomechanics of Trap Reopening in the Venus Flytrap (Dionaea muscipula).
In: Advanced Science, 2022, 9 (22)
doi: 10.26083/tuprints-00022437
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: Smooth or with a Snap! Biomechanics of Trap Reopening in the Venus Flytrap (Dionaea muscipula)
Language: English
Date: 7 October 2022
Place of Publication: Darmstadt
Year of primary publication: 2022
Publisher: Wiley-VCH
Journal or Publication Title: Advanced Science
Volume of the journal: 9
Issue Number: 22
Collation: 8 Seiten
DOI: 10.26083/tuprints-00022437
Corresponding Links:
Origin: Secondary publication DeepGreen

Fast snapping in the carnivorous Venus flytrap (Dionaea muscipula) involves trap lobe bending and abrupt curvature inversion (snap‐buckling), but how do these traps reopen? Here, the trap reopening mechanics in two different D. muscipula clones, producing normal‐sized (N traps, max. ≈3 cm in length) and large traps (L traps, max. ≈4.5 cm in length) are investigated. Time‐lapse experiments reveal that both N and L traps can reopen by smooth and continuous outward lobe bending, but only L traps can undergo smooth bending followed by a much faster snap‐through of the lobes. Additionally, L traps can reopen asynchronously, with one of the lobes moving before the other. This study challenges the current consensus on trap reopening, which describes it as a slow, smooth process driven by hydraulics and cell growth and/or expansion. Based on the results gained via three‐dimensional digital image correlation (3D‐DIC), morphological and mechanical investigations, the differences in trap reopening are proposed to stem from a combination of size and slenderness of individual traps. This study elucidates trap reopening processes in the (in)famous Dionaea snap traps – unique shape‐shifting structures of great interest for plant biomechanics, functional morphology, and applications in biomimetics, i.e., soft robotics.

Uncontrolled Keywords: biomechanics, carnivorous plants, mechanical instability problems, plant movement, snap‐buckling, snap‐traps
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-224372
Classification DDC: 500 Science and mathematics > 570 Life sciences, biology
500 Science and mathematics > 580 Plants (botany)
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 10 Department of Biology > Botanischer Garten
Date Deposited: 07 Oct 2022 13:23
Last Modified: 14 Nov 2023 19:05
SWORD Depositor: Deep Green
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/22437
PPN: 500226121
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