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

Autor: Durak GM; Botanical Garden, Plant Biomechanics Group, University of Freiburg, Freiburg im Breisgau, 79085, Germany., Thierer R; Institute for Structural Mechanics, University of Stuttgart, Stuttgart, 70550, Germany., Sachse R; TUM School of Engineering and Design, Department of Engineering Physics and Computation, Technical University of Munich, Garching b. München, 85748, Germany., Bischoff M; Institute for Structural Mechanics, University of Stuttgart, Stuttgart, 70550, Germany., Speck T; Botanical Garden, Plant Biomechanics Group, University of Freiburg, Freiburg im Breisgau, 79085, Germany.; Cluster of Excellence livMatS @ FIT - Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Freiburg im Breisgau, 79110, Germany., Poppinga S; Botanical Garden, Plant Biomechanics Group, University of Freiburg, Freiburg im Breisgau, 79085, Germany.; Cluster of Excellence livMatS @ FIT - Freiburg Center for Interactive Materials and Bioinspired Technologies, University of Freiburg, Freiburg im Breisgau, 79110, Germany.; Department of Biology, Technical University of Darmstadt, Botanical Garden, Darmstadt, 64287, Germany.
Jazyk: angličtina
Zdroj: Advanced science (Weinheim, Baden-Wurttemberg, Germany) [Adv Sci (Weinh)] 2022 Aug; Vol. 9 (22), pp. e2201362. Date of Electronic Publication: 2022 Jun 01.
DOI: 10.1002/advs.202201362
Abstrakt: 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.
(© 2022 The Authors. Advanced Science published by Wiley-VCH GmbH.)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje