Previous Year Question
Many transplanted seedlings do not grow because
the new soil does not contain favourable minerals
most of the root hairs grip the new soil too hard
most of the root hairs are lost during transplantation
leaves get damaged during transplantation
Correct Answer: C
Detailed Solution
Root hairs are extremely fine extensions of the epidermal cells of roots. They greatly increase the absorptive surface of the root and play a major role in absorbing water and dissolved minerals from the soil.
When a plant is removed from one location and transplanted to another, the soil surrounding its roots may be displaced and numerous delicate root hairs may be broken or destroyed.
Following the loss of root hairs, the plant’s ability to absorb water and minerals suddenly decreases, while transpiration from the leaves continues. This can produce water deficiency and transplant shock.
If the plant cannot rapidly develop new roots and root hairs, it may wilt or its growth may cease.
The new soil need not be completely deficient in favourable minerals. Similarly, root hairs gripping the soil too firmly is not a problem. Leaves may sometimes be damaged, but the loss of root hairs is the principal reason why many transplanted seedlings fail to grow.