TREE MORPHOLOGY AND ANATOMY
ROOT SYSTEM
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
hypodermis
|
|
|
epidermis
|
|
|
Casparian Strip
|
|
|
None of the above
|
Detailed explanation-1: -The Casparian strip creates a barrier to harmful chemicals, like herbicides, which cannot pass through it. Without this strip, such chemicals would have spread throughout the plant via the xylem, thus killing it. It also prevents harmful microbes from gaining entry into the plant and causing infections.
Detailed explanation-2: -Casparian strip is generally composed of lignin but sometimes it is composed of suberin. It is mainly formed by the deposition on the radial and transverse walls of the endodermis and is chemically different from the rest of the cell wall.
Detailed explanation-3: -The Casparian strip is named after the person who first recognized it, Robert Caspary (1818-1887). See also: root. apoplast.