Two-dimensional tension tests in plant biomechanics--sweet cherry fruit skin as a model system

Plant Biology
Hendrik BargelC Neinhuis

Abstract

Splitting of fruits is a function of two-dimensional tension caused by different growth rates of tissues and turgor, especially water uptake shortly before harvest. In order to analyse the mechanical properties of spheroid plant material close to stress-strain conditions in vivo, a new hydraulic two-dimensional testing device was set up. Sweet cherry (Prunus avium L.) fruit skin was chosen as a model system. The recorded pressure-deflection curves were non-linear, with a considerable initial "lag phase" and a distinct increasing end part. Taking into account the special geometry, these curves could be modelled with a newly developed analytical approach based on linear elastic material behaviour. The results demonstrated good correlation if a modulus of elasticity ranging from 160 to 250 MPa for the cherry fruit skin was chosen. In addition, a mean strength value of 47 MPa was calculated based on the theory of thin shells and spheres. The results are compared with mechanical data found for fruits and other plant material. In order to test the theoretical approach, two- and one-dimensional tension tests were performed on packaging PE foil, revealing a mean modulus of 171 MPa in bi-axial tension, and 193 and 242 MPa in uni-axial t...Continue Reading

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Citations

Sep 26, 2013·Journal of Experimental Botany·Ingo Burgert, Tobias Keplinger
Jun 21, 2011·Plant Science : an International Journal of Experimental Plant Biology·Eva DomínguezAntonio Heredia
Oct 11, 2017·Journal of Experimental Botany·Bishnu P Khanal, Moritz Knoche
Nov 6, 2013·American Journal of Botany·Marco CaliaroOlga Speck
Jul 26, 2017·The Plant Journal : for Cell and Molecular Biology·Hugh C WoolfendenRichard J Morris
Nov 12, 2010·Proceedings. Biological Sciences·Jürgen HummelDaryl Codron
Apr 21, 2020·Plant Methods·Michail MichailidisAthanassios Molassiotis
Jul 14, 2019·Journal of Experimental Botany·Amir J Bidhendi, Anja Geitmann
Oct 1, 2006·Functional Plant Biology : FPB·Hendrik BargelChristoph Neinhuis

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