The process of development of pollen mother cell into a mature pollen grain includes.

Options

A. Grain genesis
B. Microsporgenesis
C. Pollen genesis
D. Sporogenesis

Answer

To solve the question regarding the process of development of pollen mother cells into mature pollen grains, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Pollen Mother Cells**:
- Pollen mother cells (PMC) are diploid cells found in the anthers of flowering plants. They undergo a specific developmental process to form pollen grains.

**Hint**: Recall that pollen mother cells are crucial for the formation of pollen grains.

2. **Formation of Sporogenous Tissue**:
- Within the anther, the pollen mother cells are part of a tissue called sporogenous tissue. This tissue consists of compact, homogenous cells that can undergo division.

**Hint**: Think about the structure of the anther and the types of cells it contains.

3. **Meiosis in Sporogenous Tissue**:
- The sporogenous tissue undergoes meiosis, a type of cell division that reduces the chromosome number by half. This process results in the formation of microspore tetrads.

**Hint**: Remember that meiosis is essential for producing gametes and spores.

4. **Microspore Tetrad Formation**:
- Each pollen mother cell divides meiotically to produce four haploid microspores, which are arranged in a cluster known as a microspore tetrad.

**Hint**: Consider how many microspores are produced from one pollen mother cell.

5. **Dissociation and Development into Pollen Grains**:
- As the microspore tetrads mature and dehydrate, they dissociate from each other and develop into individual pollen grains.

**Hint**: Think about the transition from tetrads to individual grains.

6. **Identifying the Correct Process**:
- The entire process of formation of microspores from pollen mother cells through meiosis is specifically termed **microsporogenesis**.

**Hint**: Focus on the terminology related to the formation of microspores from pollen mother cells.

### Final Answer:
The process of development of pollen mother cells into mature pollen grains is known as **microsporogenesis**.