The vascular cambium is a lateral meristem: The vascular cambium is the source of both the secondary xylem (inwards) and the secondary phloem (outwards), and hence is located between these tissues in the stem. A meristem is a tissue in plants consisting of unspecialized, youthful cells (meristematic cells) and found in zones of the plant where growth can take place - the roots and shoots. ... Secondary xylem is formed by a vascular cambium. ... In vascular plants, phloem is the living tissue that carries organic nutrients, particularly sucrose, to all parts of the plant where needed. ...
The vascular cambium usually consist of two types of cells:
Fusiform initials (tall cells, axially-oriented)
Ray initials (almost isodiametric cells - smaller and round to angular in shape)
Vascular cambium is a part of the plant's meristem - series of tissues consisting of embryonic (incompletely differentiated) cells from which other (and more differentiated) plant tissues originate. A meristem is a tissue in plants consisting of unspecialized, youthful cells (meristematic cells) and found in zones of the plant where growth can take place - the roots and shoots. ... It has been suggested that extracellular be merged into this article or section. ...
The procambium, in plants, is a primary meristem of roots and shoots that forms the vascular tissue (primary xylem and primary phloem. ... Cork cambium is a tissue found in woody plants as part of the periderm. ...
The vascularcambium forms a continuous cylinder of meristematic cells in the stem, producing both secondary phloem and secondary xylem of wood.
The general aim of my project is to obtain genetic markers for different stages of vascularcambium development and differentiation; to identify and characterize genes involved in regulation of cambial meristem maintenance and differentiation; and to seek vascular cambial genes able to increase wood production by affecting the early stage of xylem development.
Cell division and differentiation in the vascularcambium are regulated by both internal and external factors.
Vascular bundles in some monocots may have a sort of cambial layer, but it never amounts to much.
Cork cambium in the roots is superficial in origin, developing just beneath the exodermis (Arber 1925); I am unclear as to how common it really is, at best it seems rare.
Botha (2005) discusses the distinctive thick-walled late-formed sieve tubes that lack companion cells to be found only in monocot vascular bundles (sampling not that good); they are close to the tracheary elements in the bundles.
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