Estimation of the solubility parameters of model plant surfaces and agrochemicals: a valuable tool for understanding plant surface interactions

Khayet, Mohamed and Fernandez Fernandez, Victoria (2012). Estimation of the solubility parameters of model plant surfaces and agrochemicals: a valuable tool for understanding plant surface interactions. "Theoretical Biology and Medical Modelling", v. 9 (n. 45); pp. 1-21. https://doi.org/10.1186/1742-4682-9-45.

Description

Title: Estimation of the solubility parameters of model plant surfaces and agrochemicals: a valuable tool for understanding plant surface interactions
Author/s:
  • Khayet, Mohamed
  • Fernandez Fernandez, Victoria
Item Type: Article
Título de Revista/Publicación: Theoretical Biology and Medical Modelling
Date: 14 November 2012
Volume: 9
Subjects:
Freetext Keywords: Agro-chemicals, Cuticle, Plant surfaces, Solubility parameter, Waxes.
Faculty: E.T.S.I. Montes (UPM)
Department: Silvopascicultura [hasta 2014]
Creative Commons Licenses: None

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Abstract

Background Most aerial plant parts are covered with a hydrophobic lipid-rich cuticle, which is the interface between the plant organs and the surrounding environment. Plant surfaces may have a high degree of hydrophobicity because of the combined effects of surface chemistry and roughness. The physical and chemical complexity of the plant cuticle limits the development of models that explain its internal structure and interactions with surface-applied agrochemicals. In this article we introduce a thermodynamic method for estimating the solubilities of model plant surface constituents and relating them to the effects of agrochemicals. Results Following the van Krevelen and Hoftyzer method, we calculated the solubility parameters of three model plant species and eight compounds that differ in hydrophobicity and polarity. In addition, intact tissues were examined by scanning electron microscopy and the surface free energy, polarity, solubility parameter and work of adhesion of each were calculated from contact angle measurements of three liquids with different polarities. By comparing the affinities between plant surface constituents and agrochemicals derived from (a) theoretical calculations and (b) contact angle measurements we were able to distinguish the physical effect of surface roughness from the effect of the chemical nature of the epicuticular waxes. A solubility parameter model for plant surfaces is proposed on the basis of an increasing gradient from the cuticular surface towards the underlying cell wall. Conclusions The procedure enabled us to predict the interactions among agrochemicals, plant surfaces, and cuticular and cell wall components, and promises to be a useful tool for improving our understanding of biological surface interactions.

More information

Item ID: 14656
DC Identifier: http://oa.upm.es/14656/
OAI Identifier: oai:oa.upm.es:14656
DOI: 10.1186/1742-4682-9-45
Official URL: http://www.tbiomed.com/content/9/1/45
Deposited by: Victoria Fernández
Deposited on: 19 Mar 2013 07:39
Last Modified: 21 Apr 2016 14:25
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