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...

DNA - schematic
Genetic Mutations

This tutorial looks at the mutation at the gene level and the harm it may bring. Learn about single nucleotide polymorph..

Gene Pool and Speciation
The Gene Pool and Population Genetics

According to Charles Darwin's theory of natural selection, preferable genes are favored by nature in the gene pool, and ..

Schematic diagram of bacterial lactose operon
Gene Action – Operon Hypothesis

Learn how the way genes control and determine every aspect of the body. This lesson uses lac operon as an example. ..

..

Neural Control Mechanisms
Neural Control Mechanisms

Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..

Developmental Biology
Developmental Biology

Developmental biology is a biological science that is primarily concerned with how a living thing grows and attains matu..

Freshwater Ecology
Freshwater Ecology

Freshwater ecology focuses on the relations of aquatic organisms to their freshwater habitats. There are two forms of co..

Related Articles...

No related articles found

See all Related Topics