Casparian band


Casparian band
Region of plant-cell wall specialized to act as a seal to prevent back-leakage of secreted material (analogous to tight junctionbetween epithelial cells). Found particularly where root parenchymal cells secrete solutes into xylem vessels.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Casparian strip — In plant anatomy, the Casparian strip is a band of Cell wall material in the radial and transverse walls of the endodermis, which is chemically different from the rest of the cell wall. It is used to block the passive flow of materials, such as… …   Wikipedia

  • casparian strip — noun Usage: usually capitalized C Etymology: Robert Caspary died 1887 German botanist + English an : a secondary thickening in many endodermal cells in the form of a continuous band or strip on the radial and transverse walls compare endodermis …   Useful english dictionary

  • Magnesium in biology — Magnesium is an essential element in biological systems. Magnesium occurs typically as the Mg2+ ion. It is an essential mineral nutrient for life[1][2][3] and is present in every cell type in every organism. For example, ATP (adenosine… …   Wikipedia

  • Suberin — is a waxy substance found in higher plants. Suberin is a main constituent of cork, and is named after the Cork Oak, Quercus suber . Anatomy and physiology Suberin is highly hydrophobic and its main function is to prevent water from penetrating… …   Wikipedia

  • endodermis — Single layer of cells surrounding the central stele (vascular tissue) in roots. The radial and transverse walls contain the hydrophobic Casparian band, that prevents water flow in or out of the stele through the apoplast. Also present in some… …   Dictionary of molecular biology

  • suberin — Fatty substance, containing long chain fatty acids and fatty esters, found in the cell walls of cork cells (phellem) in higher plants. Also found in the Casparian band. Renders the cell wall impervious to water …   Dictionary of molecular biology

  • cortex — /kawr teks/, n., pl. cortices / teuh seez /. 1. Anat., Zool. a. the outer region of an organ or structure, as the outer portion of the kidney. b. the cerebral cortex. 2. Bot. a. the portion of a stem between the epidermis and the vascular tissue; …   Universalium

  • lower vascular plant — ▪ biology Introduction formerly  pteridophyte,  also called  vascular cryptogam,         any of the spore bearing vascular plants, including the ferns, club mosses, spike mosses, quillworts, horsetails, and whisk ferns. Once considered of the… …   Universalium


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.