publication . Article . 2003

A new method for vulnerability analysis of small xylem areas reveals that compression wood of Norway spruce has lower hydraulic safety than opposite wood

S. MAYR; H. COCHARD;
Open Access English
  • Published: 01 Jan 2003
  • Publisher: HAL CCSD
  • Country: France
Abstract
Compression wood is formed at the underside of conifer twigs to keep branches at their equilibrium position. It differs from opposite wood anatomically and subsequently in its mechanical and hydraulic properties. The specific hydraulic conductivity (ks) and vulnerability to drought-induced embolism (loss of conductivity versus water potential ψ) in twigs of Norway spruce [Picea abies (L.) Karst.] were studied via cryo-scanning electron microscope observations, dye experiments and a newly developed ‘Micro-Sperry’ apparatus. This new technique enabled conductivity measurements in small xylem areas by insertion of syringe cannulas into twig samples. The hydraulic p...
Subjects
free text keywords: PROPRIETE HYDRAULIQUE, [SDV.EE]Life Sciences [q-bio]/Ecology, environment, Plant Science, Physiology, Botany, Picea abies, biology.organism_classification, biology, Conductivity, Hydraulic conductivity, Compression (physics), Xylem, Twig, Cavitation, Tracheid
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