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

Fernandez Fernandez, Victoria; Sancho-Knapik, Domingo; Guzmán Delgado, Paula; Peguero Pina, Jose Javier; Gil Sanchez, Luis; Karabourniotis, George; Khayet, Mohamed; Fasseas, Costas; Heredia-Guerrero, José Alejandro; Heredia, Antonio y 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.

Descripción

Título: Wettability, polarity and water absorption of Quercus ilex leaves: effect of leaf side and age
Autor/es:
  • Fernandez Fernandez, Victoria
  • Sancho-Knapik, Domingo
  • Guzmán Delgado, Paula
  • Peguero Pina, Jose Javier
  • Gil Sanchez, Luis
  • Karabourniotis, George
  • Khayet, Mohamed
  • Fasseas, Costas
  • Heredia-Guerrero, José Alejandro
  • Heredia, Antonio
  • Gil Pelegrín, E.
Tipo de Documento: Artículo
Título de Revista/Publicación: Plant Physiology
Fecha: 1 Septiembre 2014
Volumen: 166
Materias:
Palabras Clave Informales: Contact angles, cuticle, holm oak, leaf, Quercus ilex, trichomes, water absorption, wettability
Escuela: E.T.S.I. Montes, Forestal y del Medio Natural (UPM)
Departamento: Silvopascicultura [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada

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Resumen

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.

Más información

ID de Registro: 30803
Identificador DC: http://oa.upm.es/30803/
Identificador OAI: oai:oa.upm.es:30803
Identificador DOI: 10.1104/pp.114.242040
URL Oficial: http://www.plantphysiol.org/content/166/1/168.full
Depositado por: Victoria Fernández
Depositado el: 05 Sep 2014 05:52
Ultima Modificación: 22 Abr 2016 01:03
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