The influence of water on the nanomechanical behavior of the plant biopolyester cutin as studied by AFM and solid-state NMR

Round, Andrew N., Yan, Bin, Dang, Soa, Estephan, Racha, Stark, Ruth E. and Batteas, James D. (2000) The influence of water on the nanomechanical behavior of the plant biopolyester cutin as studied by AFM and solid-state NMR. Biophysical Journal, 79 (5). pp. 2761-2767. ISSN 0006-3495

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Abstract

Atomic force microscopy and solid-state nuclear magnetic resonance have been used to investigate the effect of water absorption on the nanoscale elastic properties of the biopolyester, cutin, isolated from tomato fruit cuticle. Changes in the humidity and temperature at which fruits are grown or stored can affect the plant surface (cuticle) and modify its susceptibility to pathogenic attack by altering the cuticle's rheological properties. In this work, atomic force microscopy measurements of the surface mechanical properties of isolated plant cutin have been made as a first step to probing the impact of water uptake from the environment on surface flexibility. A dramatic decrease in surface elastic modulus (from similar to 32 to similar to6 MPa) accompanies increases in water content as small as 2 wt %. Complementary solid-state nuclear magnetic resonance measurements reveal enhanced local mobility of the acyl chain segments with increasing water content, even at molecular sites remote from the covalent cross-links that are likely to play a crucial role in cutin's elastic properties.

Item Type: Article
Uncontrolled Keywords: atomic-force microscopy,separation,properties,nuclear-magnetic-resonance,suberin,calibration,dynamics,friction,elastic,probes,polyester
Faculty \ School: Faculty of Science > School of Pharmacy
Depositing User: Rachel Smith
Date Deposited: 08 Jun 2011 09:36
Last Modified: 21 Apr 2020 21:19
URI: https://ueaeprints.uea.ac.uk/id/eprint/31965
DOI: 10.1016/S0006-3495(00)76515-5

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