Many pollen tubes are formed during the germination of pollen grains in

Options

A. Solanum
B. Salvia
C. Cucurbita
D. Capsella

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen Grain Structure**:
- Pollen grains consist of two main cells: a larger vegetative cell and a smaller generative cell. The vegetative cell is responsible for forming the pollen tube during germination, while the generative cell produces male gametes.

2. **Pollen Tube Formation**:
- When pollen grains germinate on the stigma of a flower, they develop a pollen tube. This tube grows down the style towards the ovule for fertilization.

3. **Types of Plants Based on Pollen Tube Formation**:
- Plants can be categorized based on the number of pollen tubes formed during germination:
- **Monosiphonous Plants**: These plants produce only one pollen tube from each pollen grain. Examples include plants from the Solanaceae family (like Solanum) and the Lamiaceae family (like Salvia).
- **Polysiphonous Plants**: These plants produce multiple pollen tubes from each pollen grain. An example of a polysiphonous plant is from the Cucurbitaceae family (like Cucurbita).

4. **Analyzing the Options**:
- **Solanum**: Monosiphonous plant (one pollen tube).
- **Salvia**: Monosiphonous plant (one pollen tube).
- **Cucurbita**: Polysiphonous plant (many pollen tubes).
- **Capsula**: Monosiphonous plant (one pollen tube).

5. **Conclusion**:
- The correct answer to the question is **Cucurbita**, as it is a member of the Cucurbitaceae family and produces many pollen tubes during the germination of pollen grains.

**Final Answer**: Cucurbita (Option 3)

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