Solanum shows

Options

A. Protogyny
B. Protandry
C. heterostyly
D. herkogany

Answer

### Step-by-Step Solution:

1. **Identify the Genus and Family**:
- Solanum is a genus that belongs to the Solanaceae family, which includes many economically important flowering plants.

2. **Understand Flower Morphology**:
- Flowers of Solanum are typically bisexual, meaning they contain both male (stamens) and female (pistils) reproductive structures.

3. **Define Pollination**:
- Pollination is the process where pollen grains from the anther (male part) land on the stigma (female part) of the flower, which is essential for fertilization.

4. **Self-Pollination vs. Cross-Pollination**:
- In bisexual flowers, there is a higher chance of self-pollination since the anthers and stigma are present in the same flower. However, self-pollination can lead to inbreeding depression.

5. **Outbreeding Devices**:
- To prevent inbreeding depression, flowering plants have developed mechanisms called outbreeding devices. These mechanisms ensure that the timing of pollen release (anther dehiscence) and stigma receptivity do not coincide.

6. **Identify the Outbreeding Device in Solanum**:
- In Solanum, the outbreeding device observed is **protogyny**. This means that the pistils mature before the anthers, ensuring that the stigma is ready to receive pollen before the pollen is released, thus preventing self-pollination.

7. **Conclusion**:
- Therefore, Solanum exhibits protogyny as its outbreeding device, which helps in avoiding inbreeding depression by ensuring that self-pollination does not occur.