IFLYSIB   05383
INSTITUTO DE FISICA DE LIQUIDOS Y SISTEMAS BIOLOGICOS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Xylem hydraulic conductivity: a complex elastic micro porous media that promote and sustain tree live.
Autor/es:
VICTOR A. KUZ; ARIEL G. MEYRA; GUILLERMO J. ZARRAGOICOECHEA
Lugar:
ViƱa del Mar, Chile
Reunión:
Workshop; Twelfth International Workshop on Instabilities and Nonequilibrium Structures; 2009
Resumen:
<!-- @page { size: 8.5in 11in; margin: 0.79in } P { margin-bottom: 0.08in } --> Tensions in the liquid water inside conducting xylem elements lead to cavitation. The resistance of conduits against cavitation and embolization are usually analyzed by constructing vulnerability curves. Via a dimensional analysis and considering cavitation as a limited growth process, it is obtained a dimensionless Verhulst differential equation. A sigmoidal function with only one control parameter, a dimensionless number, is a self similar solution of this equation. This number evidences the relation between function and structure of the xylem system. Vulnerability is regulated by intrinsic properties of xylem conducting elements as it is the capillary flow in a porous elastic media.