Vascular cambium

Vascular cambium

__NOTOC__The vascular cambium is a lateral meristem in the vascular tissue of plants. The vascular cambium is the source of both the secondary xylem (inwards, towards the pith) and the secondary phloem (outwards), and is located between these tissues in the stem and root. A few leaves even have a vascular cambium. [Ewers, F.W. 1982. Secondary growth in needle leaves of "Pinus longaeva" (bristlecone pine) and other conifers: Quantitative data. "American Journal of Botany" 69: 1552-1559. [http://links.jstor.org/sici?sici=0002-9122(198211%2F12)69%3A10%3C1552%3ASGINLO%3E2.0.CO%3B2-K] ]

The vascular cambium usually consist of two types of cells:
* Fusiform initials (tall cells, ly-oriented)
* Ray initials (almost isodiametric cells - smaller and round to angular in shape)

Vascular cambium is a type of meristem - a tissue consisting of embryonic (incompletely differentiated) cells from which other (and more differentiated) plant tissues originate. Primary meristems are the apical meristems on root tips and shoot tips. Another lateral meristem is the cork cambium, which produces cork, part of the bark.

Vascular cambia are found in dicots and gymnosperms but not monocots, which usually lack secondary growth.

For successful grafting, the vascular cambia of the stock and scion must be aligned so they can grow together.

Synonyms

* Wood cambium
* Main cambium
* Bifacial cambium

References

See also

*Meristem
*Cork cambium
*Unifacial cambium

External links

* Pictures of [http://botweb.uwsp.edu/anatomy/vascularcambium.htm Vascular cambium]
* [http://www.sbs.utexas.edu/mauseth/weblab/webchap3par/3.2-5.htm Detailed description - James D. Mauseth]


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  • vascular cambium — /væskjələ ˈkæmbiəm/ (say vaskyuhluh kambeeuhm) noun a cambium which gives rise to secondary vascular tissues, usually a large quantity of xylem and a small amount of phloem …  

  • vascular cambium — In biennials and perennials, cambium giving rise to secondary phloem and secondary xylem …   Glossary of Biotechnology

  • vascular cambium — noun : the lateral meristem from which vascular tissue is differentiated and which is distinguished from phellogen …   Useful english dictionary

  • Vascular tissue — This is an article about vascular tissue in plants. For transport in animals, see Circulatory system. Vascular tissue is a complex tissue found in vascular plants, meaning that it is composed of more than one cell type. The primary components of… …   Wikipedia

  • cambium — Bot. Meristematic plant tissue, commonly present as a thin layer which forms new cells on both sides. Located either in vascular tissue (vascular cambium), forming xylem on one side and phloem on the other, or in cork (cork cambium or phellogen) …   Dictionary of molecular biology

  • Cambium — In botany the cambium is a layer or layers of tissue, also known as lateral meristems, that are the source of cells for secondary growth. There are two types of cambium*Cork cambium *Vascular cambiumReferences*Taiz, L and Zeiger, E. 1998. Plant… …   Wikipedia

  • Vascular plant — Vascular Plants Temporal range: Mid Silurian [1] Recent Scientific classification Kingdom …   Wikipedia

  • vascular system — ▪ plant physiology       in plants, assemblage of conducting tissues and associated supportive fibres. xylem tissue transports water and dissolved minerals to the leaves, and phloem tissue conducts food from the leaves to all parts of the plant.… …   Universalium

  • vascular ray — noun a sheet of vascular tissue separating the vascular bundles • Syn: ↑medullary ray • Hypernyms: ↑vascular tissue * * * noun : a ray of cambial origin that occurs in the stele of many vascular plants and often separates the vascular bundles see …   Useful english dictionary

  • vascular tissue — noun tissue that conducts water and nutrients through the plant body in higher plants • Hypernyms: ↑plant tissue • Hyponyms: ↑stele, ↑cambium, ↑vascular bundle, ↑vascular strand, ↑fibrovascular bundle, ↑ …   Useful english dictionary

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