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Kinematics governing mechanotransduction in the sensory hair of the Venus flytrap

Saikia, Eashan; Läubli, Nino F; Burri, Jan T; Rüggeberg, Markus; Schlepütz, Christian M; Vogler, Hannes; Burgert, Ingo; Herrmann, Hans J; Nelson, Bradley J; Grossniklaus, Ueli; Wittel, Falk K (2020). Kinematics governing mechanotransduction in the sensory hair of the Venus flytrap. International Journal of Molecular Sciences, 22:280.

Abstract

Insects fall prey to the Venus flytrap (Dionaea muscipula) when they touch the sensory hairs located on the flytrap lobes, causing sudden trap closure. The mechanical stimulus imparted by the touch produces an electrical response in the sensory cells of the trigger hair. These cells are found in a constriction near the hair base, where a notch appears around the hair’s periphery. There are mechanosensitive ion channels (MSCs) in the sensory cells that open due to a change in membrane tension; however, the kinematics behind this process is unclear. In this study, we investigate how the stimulus acts on the sensory cells by building a multi-scale hair model, using morphometric data obtained from μ-CT scans. We simulated a single-touch stimulus and evaluated the resulting cell wall stretch. Interestingly, the model showed that high stretch values are diverted away from the notch periphery and, instead, localized in the interior regions of the cell wall. We repeated our simulations for different cell shape variants to elucidate how the morphology influences the location of these high-stretch regions. Our results suggest that there is likely a higher mechanotransduction activity in these ’hotspots’, which may provide new insights into the arrangement and functioning of MSCs in the flytrap.

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Plant and Microbial Biology
07 Faculty of Science > Zurich-Basel Plant Science Center
Dewey Decimal Classification:580 Plants (Botany)
Scopus Subject Areas:Physical Sciences > Catalysis
Life Sciences > Molecular Biology
Physical Sciences > Spectroscopy
Physical Sciences > Computer Science Applications
Physical Sciences > Physical and Theoretical Chemistry
Physical Sciences > Organic Chemistry
Physical Sciences > Inorganic Chemistry
Uncontrolled Keywords:Physical and Theoretical Chemistry, Inorganic Chemistry, Organic Chemistry, Spectroscopy, Molecular Biology, Catalysis, General Medicine, Computer Science Applications
Language:English
Date:30 December 2020
Deposited On:15 Jan 2021 15:17
Last Modified:24 Oct 2024 01:39
Publisher:MDPI Publishing
ISSN:1422-0067
OA Status:Gold
Free access at:Publisher DOI. An embargo period may apply.
Publisher DOI:https://doi.org/10.3390/ijms22010280
Project Information:
  • Funder: SNSF
  • Grant ID: CR22I2_166110
  • Project Title: Mechanical Basis for the Convergent Evolution of Sensory Hairs in Animals and Plants
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