Wettability, polarity and water absorption of Quercus ilex leaves: effect of leaf side and age

Fernandez Fernandez, Victoria and Sancho-Knapik, Domingo and Guzmán Delgado, Paula and Peguero Pina, Jose Javier and Gil Sanchez, Luis Alfonso and Karabourniotis, George and Khayet, Mohamed and Fasseas, Costas and Heredia-Guerrero, José Alejandro and Heredia, Antonio and Gil Pelegrín, E. (2014). Wettability, polarity and water absorption of Quercus ilex leaves: effect of leaf side and age. "Plant Physiology", v. 166 ; pp. 168-180. ISSN 1532-2548. https://doi.org/10.1104/pp.114.242040.

Description

Title: Wettability, polarity and water absorption of Quercus ilex leaves: effect of leaf side and age
Author/s:
  • Fernandez Fernandez, Victoria
  • Sancho-Knapik, Domingo
  • Guzmán Delgado, Paula
  • Peguero Pina, Jose Javier
  • Gil Sanchez, Luis Alfonso
  • Karabourniotis, George
  • Khayet, Mohamed
  • Fasseas, Costas
  • Heredia-Guerrero, José Alejandro
  • Heredia, Antonio
  • Gil Pelegrín, E.
Item Type: Article
Título de Revista/Publicación: Plant Physiology
Date: 1 September 2014
ISSN: 1532-2548
Volume: 166
Subjects:
Freetext Keywords: Contact angles, cuticle, holm oak, leaf, Quercus ilex, trichomes, water absorption, wettability
Faculty: E.T.S.I. Montes, Forestal y del Medio Natural (UPM)
Department: Silvopascicultura [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (1MB) | Preview

Abstract

Plant trichomes play important protective functions and may have a major influence on leaf surface wettability. With the aim of gaining insight into trichome structure, composition and function in relation to water-plant surface interactions, we analyzed the adaxial and abaxial leaf surface of Quercus ilex L. (holm oak) as model. By measuring the leaf water potential 24 h after the deposition of water drops on to abaxial and adaxial surfaces, evidence for water penetration through the upper leaf side was gained in young and mature leaves. The structure and chemical composition of the abaxial (always present) and adaxial (occurring only in young leaves) trichomes were analyzed by various microscopic and analytical procedures. The adaxial surfaces were wettable and had a high degree of water drop adhesion in contrast to the highly unwettable and water repellent abaxial holm oak leaf sides. The surface free energy, polarity and solubility parameter decreased with leaf age, with generally higher values determined for the abaxial sides. All holm oak leaf trichomes were covered with a cuticle. The abaxial trichomes were composed of 8% soluble waxes, 49% cutin, and 43% polysaccharides. For the adaxial side, it is concluded that trichomes and the scars after trichome shedding contribute to water uptake, while the abaxial leaf side is highly hydrophobic due to its high degree of pubescence and different trichome structure, composition and density. Results are interpreted in terms of water-plant surface interactions, plant surface physical-chemistry, and plant ecophysiology.

More information

Item ID: 30803
DC Identifier: http://oa.upm.es/30803/
OAI Identifier: oai:oa.upm.es:30803
DOI: 10.1104/pp.114.242040
Official URL: http://www.plantphysiol.org/content/166/1/168.full
Deposited by: Victoria Fernández
Deposited on: 05 Sep 2014 05:52
Last Modified: 10 Jan 2019 12:51
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM