The phenomenon of maturation of anthers earlier then the stigma of the same flower is

Options

A. Dicilny
B. Protandry
C. Herkogamy
D. Heterostyly.

Answer

To solve the question regarding the phenomenon of maturation of anthers earlier than the stigma of the same flower, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the term that describes the situation where the anthers (male reproductive parts) mature before the stigma (female reproductive part) in the same flower.

2. **Analyzing the Options**:
- **Option A: Diculine**: This term refers to the presence of only one type of flower in a plant. It does not relate to the maturation timing of anthers and stigma. Therefore, this option is incorrect.

- **Option B: Protandry**: This term specifically describes the condition where the anthers mature before the stigma. This ensures that self-fertilization does not occur, as the male parts are ready before the female parts. This option is likely the correct answer.

- **Option C: Hercogamy**: This term refers to a mechanical barrier in bisexual flowers that prevents self-pollination. It does not specifically address the timing of maturation of anthers and stigma, making this option incorrect.

- **Option D: Heterostyle**: This term refers to the presence of different flower forms within the same plant. It does not relate to the maturation of reproductive parts, so this option is also incorrect.

3. **Conclusion**: After analyzing all the options, the correct answer is **Option B: Protandry**, as it accurately describes the phenomenon where anthers mature before the stigma in the same flower.

### Final Answer:
The phenomenon of maturation of anthers earlier than the stigma of the same flower is called **Protandry**.