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Ponencias en congresos:
The role of stored water in stem water transport investigated through linear variable displacement transducers (LVDT): Do trees have a pulse?
Año:2014
Áreas de investigación
  • Ciencias naturales y ciencias de la salud
Datos
Descripción
Reversible stem swelling and shrinking monitored through linear variable displacement transducer (LVDT) can be attributed to water gain or loss from elastic plant tissues. Flow-induced oscillations of elastic tubes have been documented in many engineering and biomechanical systems. We aimed at investigating whether such oscillatory flow could be detected in stem tissues in order to gain some insight into the contribution of stored water to the ascent of sap. Four to six LVDT sensors were placed at different heights in the stem of four Eucalyptus globulus seedlings. Both increasing soil water or decreasing transpiration led to a steep increase in stem diameter (up to 102 ?m in 15 minutes). Maximum daily stem shrinkage (mds) was highest in the most apical stem sections. Maximum stem hydraulic conductivity was lowest in those plants in which the highest mds values were measured, as could be expected from the Ohms law analogy whenever mds values were correlated to xylem water potential. Data measured every 30 seconds and 2-min means revealed oscillatory patterns of stem swelling and shrinking, with series of up to 24 consecutive waves of quite similar wavelength that could be detected at different heights in the stem and both when the sensor was placed over bark or directly over the xylem. Oscillatory patterns previously reported in transpiration, stomatal conductance and sap flow had much longer wavelengths (70 min) than those found in the present study (<10 min). The relevance of shortwavelength oscillations in xylem sap transport is discussed.
Internacional
Si
Nombre congreso
Plant Biology Europe. FESPB/EPSO
Tipo de participación
960
Lugar del congreso
Revisores
Si
ISBN o ISSN
00-0000-000-0
DOI
Fecha inicio congreso
22/06/2014
Fecha fin congreso
26/06/2014
Desde la página
460
Hasta la página
460
Título de las actas
Abstract Book Poster Presentations
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Jesus Rodriguez Calcerrada (UPM)
  • Autor: Jaime Puertolas
  • Autor: Luis Alfonso Gil Sanchez (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Genética, Fisiología e Historia Forestal
  • Departamento: Sistemas y Recursos Naturales
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