Question

If a stem is girdled

• A. Root dies first
• B. Shoot dies first
• C. Both will die together
• D. None of the above will die

Answer 1

The correct option is A Root dies first

In a ring girdled plant, the root dies first because of the removal of the strip of bark. Like all the vascular plants, trees use two vascular tissues for transportation of water and nutrients: the xylem (also known as the wood) and the phloem (the innermost layer of the bark). Girdling results in the removal of the phloem and death of roots due to the inability of the leaves to transport sugars (primarily sucrose) to the roots.

Thus, the correct answer is option A.