Name the four types of adventitious roots modified for food storage.

1. Figure ‘a’ indicates simple tuberous root. 

a. Simple tuberous roots become swollen and do not show definite shape.

b. They are produced singly. 

c. The roots arise from nodes over the stem and penetrate into the soil, e.g. sweet potato or shakarkand (Ipomoea batatas).

2. Figure ‘b’ indicates fasciculated tuberous roots. 

a. A cluster of roots arising from one point which becomes thick and fleshy due to storage of food is known as fasciculated tuberous root.

b. These clusters are seen at the base of the stem, e.g. Dahlia, Asparagus, etc. 

3. Figure ‘c’ indicates Moniliform roots. 

a. Some adventitious roots get swollen at regular intervals.

b. These gives them the appearance of beads of a necklace. Such roots are called as Moniliform roots, e.g. Spinacia oleracea (Indian Spinach). 

4. Figure ‘d’ indicates Nodulose roots. 

The cluster of long slender roots become enlarged at the tips forming nodules is known as nodulose roots, e.g. Arrow root (Maranta), Amhaldi or mango ginger (Curcuma amada).