Question

If all the lenticels of stem are blocked, the first to die will be

• A. Leaves
• B. Shoot tips
• C. Roots
• D. None of the above

Answer 1

The correct option is C Roots

A lenticel is the opening present on the periderm of the secondarily thickened organs and the bark of woody stems and roots of dicotyledonous flowering plants. It is a porous tissue consisting of cells with large intercellular spaces. It helps in the direct exchange of gasses between the internal tissues and atmosphere through the bark, which is otherwise impermeable to gases. Lenticels are found in most of the woody trees but absent is woody climbers. If lenticels are blocked then root will die first due to lack of gaseous exchange.

Thus, option C is correct.