In Pollen-pistil Interaction

Options

A. Pistil accepts compatible pollen and promotes post-Pollination events
B. Pistil rejects the incompatible pollen by preventing pollen germination on the stigma
C. Pistil rejects the incompatible pollen by preventing pollen tube growth in the style
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Understanding Pollen-Pistil Interaction:**
- The interaction between pollen grains and the pistil (the female reproductive part of a flower) is crucial for fertilization. The pistil can differentiate between compatible and incompatible pollen.

2. **Analyzing the First Option:**
- The first option states that the pistil accepts compatible pollen and promotes post-pollination events. This is true because when compatible pollen lands on the stigma (the top part of the pistil), the pistil recognizes it and facilitates its germination, leading to the growth of the pollen tube.

3. **Analyzing the Second Option:**
- The second option mentions that the pistil rejects incompatible pollen by preventing its germination on the stigma. This is also correct. If the pollen is incompatible, the pistil will not allow it to germinate, thus preventing fertilization.

4. **Analyzing the Third Option:**
- The third option states that the pistil prevents the pollen tube from growing in the style if the pollen is incompatible. This is accurate as well. The pistil actively prevents the growth of the pollen tube if the pollen is not compatible, ensuring that only compatible pollen can fertilize the ovule.

5. **Conclusion:**
- Since all three statements regarding the pollen-pistil interaction are correct, we can conclude that the answer is "All of the above."