The hydraulic safety zone at the base of barley roots

A hydraulic construction of the vessels occurs at the base of the primary roots of barley (Hordeum vulgare L.). The constriction and consequent hydraulic protection result from an extreme shortening of the vessel elements, leading to the accumulation of perforation plates with simple, broad-rimmed p...

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Bibliographic Details
Published in:Planta 1986-12, Vol.169 (4), p.465-470
Main Author: Luxova, M. (Slovak Academy of Sciences, Bratislava (Czechoslovakia). Inst. of Experimental Biology and Ecology)
Format: Article
Language:English
Subjects:
Absorption. Translocation of ions and substances. Permeability
Agronomy. Soil science and plant productions
AGUA
Barley
Biological and medical sciences
Cylinders
Druck
EAU
Economic plant physiology
Embryos
Fundamental and applied biological sciences. Psychology
Gewebestruktur
Hordeum
HORDEUM VULGARE
Hydraulics
hydraulische Sicherheitszone
Metabolism
Metabolism. Physicochemical requirements
Nutrition. Photosynthesis. Respiration. Metabolism
Phloem
Plant physiology and development
Plant roots
Plants
Seminal roots
TEJIDO VASCULAR
TISSU VASCULAIRE
TRANSLOCACION
TRANSLOCATION
VASCULAR TISSUES
Vaskulargewebe
Wassertransport
WATER
Wurzel
Xylem
Xylem vessels
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Summary:A hydraulic construction of the vessels occurs at the base of the primary roots of barley (Hordeum vulgare L.). The constriction and consequent hydraulic protection result from an extreme shortening of the vessel elements, leading to the accumulation of perforation plates with simple, broad-rimmed perforations which are smaller than those in normal-length vessel elements. It is compensated for by a local increase in the number of tracheary elements and an increase in their diameter. A similar trend of development was observed both at the base of other seminal roots and at the base of stem-borne adventitious roots. The rate at which compensation for the hydraulic constriction occurs could be of crucial importance for the axial resistance of water transport.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00392094