vascular bundle
structure composed of tissues (xylem and phloem) for conducting liquids in higher plants, and for giving strength
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
vascular bundle Groups of xylem, phloem and cambium cells in stems of plants descended from the procambium embryonic tissue layer.
vascular bundle
In plants, a group of longitudinal supporting and conducting tissues (xylem and phloem).
vascular cambium ...
vascular bundle
A structure of vascular plants that runs up through the roots, into the stems, and out into the leaves, and whose function is transport of water, ions and dissolved organic solutes within the plant.
vascular bundle A strand of tissue containing primary xylem and primary phloem, often surrounded by a bundle sheath.
vascular cambium Meristematic tissue that gives rise to secondary xylem and secondary phloem.
Vascular bundles are present throughout the monocot stem, although concentrated towards the outside. This differs from the monocot root that has a ring of vascular bundles and often none in the center.
Each vascular bundle contains:
four xylem vessels
a group of xylem tracheids.
both carry water and dissolved minerals up the stem.
a ring of primary vascular bundles in the stem
taproot system Compare: monocot
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Monocot stems have scattered vascular bundles. Dicot stems have their vascular bundles in a ring arrangement. Monocot stems have most of their vascular bundles near the outside edge of the stem.
Accordingly, the main vascular bundle of xylem and phloem present in the stem of a plant bifurcates into leaf traces, which are branches of vascular tissue that supply leaves.
Stem vascular arrangement -- Vascular tissue occurs in long strands called vascular bundles. These bundles are arranged within the stem of dicots to form a cylinder, appearing as a ring of spots when you cut across the stem.
xylem - the woody tissue of a plant; the part of the vascular bundle, consisting of tracheal tissue, Â arenchyma, etc.
 See also: Plant, Tissue, Cells, Phloem, Xylem
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