Meristematic tissues are generally associated with cell division they don't have any waste material to store so they don't contain vacuoles .

Absence of Vacuoles in Meristematic Cells
Meristematic cells are a type of plant cell that is actively dividing and responsible for growth and development of the plant. These cells are characterized by their ability to undergo rapid cell division and differentiation. One of the key features of meristematic cells is the absence of vacuoles.

1. Role of Vacuoles
Vacuoles are membrane-bound organelles found in plant cells that serve various functions such as storage of nutrients, waste disposal, and maintenance of turgor pressure. They also play a role in maintaining cell shape and providing structural support to the cell.

2. Rapid Cell Division
Meristematic cells are constantly dividing to produce new cells for growth and repair. The absence of vacuoles in meristematic cells allows them to have more space for cellular machinery involved in cell division, such as the nucleus, ribosomes, and endoplasmic reticulum. This lack of vacuoles ensures that the cells can efficiently carry out the process of mitosis without any hindrance.

3. Metabolic Activity
Meristematic cells are highly metabolically active and require a high concentration of enzymes and other molecules involved in cell division. The absence of vacuoles in these cells allows for a higher concentration of these molecules, which is essential for their rapid growth and division.

4. Flexibility and Plasticity
The absence of vacuoles in meristematic cells also contributes to their flexibility and plasticity. Without the presence of large vacuoles taking up space, these cells can easily change shape and size as needed during growth and development.
In conclusion, the absence of vacuoles in meristematic cells is a crucial adaptation that allows these cells to efficiently carry out rapid cell division, maintain high metabolic activity, and exhibit flexibility and plasticity required for plant growth and development.