Dictionary > Casparian strip

Casparian strip

Definition
noun
(botany) A strip or a band of cell wall material around the walls of endodermal cells of roots
Supplement
The Casparian strip is a strip or a band of cell wall material in the roots of plants. It is particularly found as a thickening on the radial and transverse walls of the endodermal cells of the root. The major component of the Casparian strip is suberin. Suberin is a lipophilic biopolymer that acts as a protective barrier against excessive water loss. In roots, the presence of suberin in the Casparian strip makes it distinct from the rest of the cell wall (which mostly has lignin). Because of the suberin in the Casparian strip, the passive flow of materials, e.g. water and solutes, into the stele is prevented. Water and nutrients absorbed by the roots are blocked from entering the stele via the apoplastic route. As a result, solutes flow via the symplastic route. This is important so that there would be selective passage of solutes, especially when they might bring harm to the plant.
The Casparian strip is named after the person who first recognized it, Robert Caspary (1818-1887).1
See also:

Reference(s):

1 CTI Reviews. (2017). Raven Biology of Plants: Biology, Botany. Cram101 Textbook Reviews.


You will also like...

primitive arthropods
Arthropods

The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

Population Growth and Survivorship
Population Growth and Survivorship

This lesson looks at population attributes, regulation, and growth. It also covers population genetics, particularly gen..

Plant Water Regulation
Plant Water Regulation

Plants need to regulate water in order to stay upright and structurally stable. Find out the different evolutionary adap..

Digestion and Absorption of Food
Digestion and Absorption of Food

The gastrointestinal system breaks down particles of ingested food into molecular forms by enzymes through digestion and..

Neurology of Illusions
Neurology of Illusions

Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

Still freshwater and plants
Still Freshwater & Plants

Plants in lentic habitats have features not found in terrestrial plants. They acquired these features as they adapt to t..

Related Articles...

No related articles found

See all Related Topics