In which of the following plants root is the food storage organ ?

Question

Accepted Answer

Option 3, Sweet Potato, is the correct answer because sweet potatoes are a classic example of a plant where the root serves as the primary food storage organ. Sweet potatoes are tuberous roots, which means they are enlarged roots that store nutrients, primarily in the form of carbohydrates. This adaptation allows the plant to survive adverse conditions and provides energy for regrowth.

1. **Explanation for Option 3 (Sweet Potato):**
   - Sweet potatoes are modified roots that store starch and other nutrients. The root system of the sweet potato plant develops these storage roots, which are rich in carbohydrates, vitamins, and minerals. This storage capability is crucial for the plant's survival and reproduction, as it provides a reserve of energy that can be used during periods of dormancy or when conditions are not favorable for growth.

2. **Explanation for why other options are incorrect:**

- **Option 1 (Potato):** Potatoes are not roots but modified stems known as tubers. They grow underground and store nutrients, but they are part of the stem system, not the root system. The eyes of the potato are actually buds from which new potato plants can grow, further indicating their stem origin.

- **Option 2 (Onion):** Onions are bulbs, which are also modified stems. The bulb consists of a short stem with fleshy leaves that store food. The primary storage organ in onions is the bulb, not the root. The roots of an onion plant are relatively small and do not serve as the main storage organ.

- **Option 4 (Ginger):** Ginger is a rhizome, which is a type of modified stem that grows horizontally underground. Like potatoes, ginger stores nutrients in its stem, not its roots. The rhizome allows the plant to spread and store energy, but it is distinct from root storage.

In conclusion, sweet potatoes are unique among the options provided because they are true roots that function as the primary storage organ for the plant, making Option 3 the correct choice.