Leaf vasculature in barley, Hordeum vulgare (Poaceae)

The vascular system of the Hordeum vulgare L. leaf consists of multiple longitudinal strands interconnected by transverse bundles. In any transverse section, the longitudinal strands can be categorized into three bundle types: small, intermediate, and large. Individual longitudinal strands intergrad...

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Bibliographic Details
Published in:American journal of botany 1990-05, Vol.77 (5), p.636-652
Main Authors: Dannenhoffer, J.M. (University of Wisconsin, Madison, WI), Ebert, W. Jr, Evert, R.F
Format: Article
Language:English
Subjects:
ANATOMIA DE LA PLANTA
ANATOMIE VEGETALE
Anatomy
Barley
Biological and medical sciences
Botany
Cardiovascular system
Corn
FAISCEAU VASCULAIRE
FEUILLE
FLOEMA
Fundamental and applied biological sciences. Psychology
Grain
HACES VASCULARES
HOJAS
HORDEUM VULGARE
LEAVES
Mesophyll cells
Morphology, anatomy, histology, cytology
PHLOEM
PHLOEME
PLANT ANATOMY
Plant cytology, morphology, systematics, chorology and evolution
PLANT VASCULAR SYSTEM
Sclerenchyma
SIEVE PLATES
Sieve tubes
SISTEMA VASCULAR DE LA PLANTA
Spermatophyta
Sugar
Sugar cane
Sugarcane
SYSTEME VASCULAIRE DES PLANTES
TEJIDO (ANATOMIA)
TISSU
TISSUES
tracheary elements
ULTRAESTRUCTURA
ULTRASTRUCTURE
VASCULAR BUNDLES
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Description
Summary:The vascular system of the Hordeum vulgare L. leaf consists of multiple longitudinal strands interconnected by transverse bundles. In any transverse section, the longitudinal strands can be categorized into three bundle types: small, intermediate, and large. Individual longitudinal strands intergrade structurally from one bundle type into another as they descend the leaf. At their distal ends, they have the anatomy of a small bundle. As they descend the leaf, most intergrade into intermediate bundle and then into large bundle types. All strands with large bundle anatomy extend basipetally into the stem. Typically, the other longitudinal strands, which do not intergrade structurally into large bundles, do not enter the sheath, but fuse with other longitudinal strands above the junction of the blade with the sheath. Despite the decrease in number of longitudinal bundles entering the sheath, an increase takes place in the total cross-sectional area of sieve tubes and tracheary elements. A linear relationship exists between leaf width and total bundle number in the blade but not in the sheath. Moreover, a linear relationship exists between cross-sectional area of vascular bundles and both total and mean cross-sectional area of tracheary elements and thin-walled sieve tubes.
ISSN:0002-9122
1537-2197
DOI:10.1002/j.1537-2197.1990.tb14449.x