GS PrelimsScience and TechnologyGeneral Science2013

Many transplanted seedlings do not grow because

A

the new soil does not contain favourable minerals

B

most of the root hairs grip the new soil too hard

C

most of the root hairs are lost during transplantation

D

leaves get damaged during transplantation

Correct Answer: Option C

Explanation

1. Transplantation involves moving a seedling or plant from one location (like a nursery bed) to another (its permanent location). 2. Root hairs are tiny, delicate extensions of the epidermal cells of plant roots. They vastly increase the surface area for absorption of water and nutrients from the soil. 3. During the process of uprooting a seedling for transplantation, it is very difficult to avoid damaging or losing a significant portion of these fine root hairs, as they are closely intertwined with soil particles. 4. When the seedling is planted in the new soil, the loss of most of the root hairs severely impairs its ability to absorb water and essential minerals immediately. 5. This condition, often referred to as transplant shock, leads to wilting and makes it difficult for the seedling to establish itself and grow, especially if conditions are not optimal (e.g., lack of water). 6. Option (A) might sometimes be a factor, but the immediate and common reason for failure is root damage. Option (B) is incorrect; the problem is the loss of root hairs, not them gripping too hard. Option (D), while possible, damage to leaves is usually less critical for initial survival than the loss of absorptive root hairs.

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