Question

When the roots are alternatively swollen and constricted, presenting a beaded appearance, they are called as

• A. Moniliform
• B. Annulated
• C. Tuberous
• D. Nodulose

Answer 1

The correct option is A Moniliform

Adventitious roots are modified for storage, additional support, nutrition and respiration. They may be tuberous, fasciculated, moniliform, nodulose and annulated.

Tuberous roots are swollen, irregularly shaped tubers which arise singly from each node. For example Sweet potato. When the storage roots occur in the cluster from the base of the stem, they are called as fasciculated roots. For example, Asparagus, Tapioca and Dahlia.

A moniliform root(Beaded root) is alternatively swollen and constricted giving a beaded appearance. For example Bitter gourd and Portulaca.

When a slender root is swollen abruptly at the apex, it is said to be nodulose. For example Mango-ginger.

When the root appears to be formed by the numerous discs placed one above the other, it is said to be annulated. For example, Ipeca.

Thus, the correct answer is option A.