The nutritive layer of microsporangia of Capsella

Options

A. Endothecium
B. Exothecium
C. Sporogenous tissue
D. Tapetum

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks for the nutritive layer of microsporangia in Capsella. To answer this, we need to know the structure of microsporangia and its layers.

2. **Defining Microsporangia**: Microsporangia are structures that produce male gametes (pollen grains) in flowering plants (angiosperms). They are crucial for the reproductive process.

3. **Identifying the Layers of Microsporangia**: Microsporangia consist of several layers:
- **Epidermis**: The outermost protective layer.
- **Endothecium**: A layer that aids in the dehiscence (opening) of the anther.
- **Middle Layers**: These provide mechanical support.
- **Tapetum**: The innermost layer that is in contact with the sporogenous tissue and provides nourishment.

4. **Analyzing the Options**:
- **Option A: Endothecium**: This layer helps in the opening of the anther but is not nutritive.
- **Option B: Exothecium**: This is another protective layer and not nutritive.
- **Option C: Sporogenous Tissue**: This tissue produces spores but does not provide nutrition.
- **Option D: Tapetum**: This is the layer that provides nutrients to the sporogenous tissue.

5. **Conclusion**: Based on the analysis, the correct answer is **Option D: Tapetum**, as it is the nutritive layer of microsporangia in Capsella.