What are the different regions of root ? Write function of each
region with diagram.
1+3+1=5
Answers
Answer:
The root is the descending portion of the plant axis. As opposed to the stem, it is positively geotropic, negatively phototropic and positively hydrotropic. The root surface is non-green and it is not divided into nodes and internodes.
In stems the branches arise from the nodes so that there is some regularity in their arrangement while this is not so in roots because of the absence of nodes. Nevertheless, the branching in roots also is acropetal.
Roots bear branches only of similar type while stems bear similar and dissimilar lateral members (branch, leaf and flower). Anatomically, root branches arise from an inner layer, i.e., they are of endogenous origin while shoot branches arise more superficially, i.e., they are exogenous.
It is seen during germination that the radicle is the first organ to grow in the seedling. This radicle gives rise to branches of primary, secondary or higher orders forming what is known as the primary or taproot system , the main root being known as the taproot which is a direct prolongation of the radicle while the branches are often designated by the general expression secondary roots.
In most dicots the root system ramifies more and more in the soil and anchors the plant very firmly. The ultimate root branches of large trees ramify through a very large and deep area, often occupying no less a space than what the tree occupies above. In most monocots, however, this primary root system does not develop so strongly and does not form the main root system. New roots grow from near the base of the radicle and they are called seminal roots.
Answer:
root pocket are seen instead of root cap in the case of aquatic plants.
