Question

The underground storage structure in Gladiolus is

• A. Corm
• B. Bulb
• C. Rhizome
• D. Stem tuber

Answer 1

Answer: (A)

Corm

The meaning of the following stem modifications are:

-Corm: It is a condensed structure which grows vertically under the soil surface. They are having spherical node and internode eg. Colocasia, Alocasia, Zaminkand, Saffron, Gladiolus, Colchicum.

-Bulb: This stem is reduced and has a disc-like structure and surrounds with numerous fleshly scaly leaves. Many roots arise from its base. Food is stored in flashy leaves. They show apical growth eg. Onion, Garlic.

-Rhizome: It is fleshy and horizontally stems found below in soil. Small nodes and internodes are found which are covered by scaly leaves. eg. Ginger, Turmeric, Canna, Water lily, Banana.

-stem tuber: The tips of underground branches become swollen in the soil. Eyes are found on then which

are axillary buds and covered with scaly leaves. eg. Potato

So, the correct answer is 'Option A- Corm'.