Who observed pollen tube in portulaca for the first time

Options

A. S.G. Nawaschim
B. Guignard
C. Strasburger
D. G.B. Amici

Answer

To solve the question "Who observed pollen tube in Portulaca for the first time?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question is asking for the name of the scientist who first observed the pollen tube in the plant species Portulaca.

2. **Identifying Key Terms**:
- Pollen tube: A structure that forms after a pollen grain lands on the stigma of a flower and is essential for fertilization in angiosperms.
- Portulaca: A genus of flowering plants, specifically referring to Portulaca oleracea in this context.

3. **Researching Historical Contributions**:
- We need to look at the contributions of various scientists in the field of botany and specifically their work related to pollen tubes and Portulaca.

4. **Reviewing Notable Scientists**:
- Navashtram and Gignath are known for their work on double fertilization.
- Strasburger is recognized for his studies on nuclear and cellular divisions in algae and higher plants.
- G.B. Amici is noted for his work in botany, particularly for discovering the pollen tube formation in Portulaca oleracea.

5. **Conclusion**: Based on the historical contributions, G.B. Amici is the scientist who first observed the pollen tube in Portulaca oleracea.

### Final Answer:
The answer is **G.B. Amici**.

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