What is modified tap root?

Answer 1

Underground Root Modifications

Taproot and adventitious roots may undergo certain modifications to perform the function of storage and vegetative propagation.

Tap Root Modifications (for storage of food)

In some plants the tap roots store reserve food for which they become swollen and assume different shapes. There are four types :

• Fusiform root - In radish the modified tap root is thickened in the middle and tapers towards both ends.

e.g., Raphanus sativus (Radish)

• Napiform root - In beetroot the modified tap root is greatly swollen at the base, but abruptly narrows into a tail-like portion.

e.g., Beta vulgaris (Beetroot)

• Conical root - In carrot the modified tap root is conical. It is broad at the base and gradually tapers towards its apex.

e.g., Daucas carota (carrot)