The Cell Wall of Diatoms

The cell wall of diatoms is a characteristic feature of these organisms. It is made up of two thin overlapping shells which fit together like a soap case. Let's look at the details of the structure of the cell wall of diatoms.

Composition of Cell Wall

The cell wall of diatoms is composed of silica or silicon dioxide (SiO2), which is a hard and durable material. This makes the cell wall of diatoms rigid and able to withstand pressure. The silica in the cell wall is in the form of amorphous hydrated silica, which is called opal.

Structure of Cell Wall

The cell wall of diatoms is made up of two shells, one inside the other, which fit together very precisely. The outer shell is called the epitheca, and the inner shell is called the hypotheca. The epitheca is usually slightly larger than the hypotheca, and they fit together like a soap case. The edges of the shells are often ornamented with various structures, such as spines, ridges, or pores.

Function of Cell Wall

The cell wall of diatoms serves several functions. It provides protection for the cell, as well as support and rigidity. It also allows the diatom to float in the water column, by providing buoyancy. The intricate structure of the cell wall also plays a role in the ecology of diatoms, by determining their shape and size, and influencing their interactions with other organisms.

Conclusion

In conclusion, the cell wall of diatoms is a complex and important structure, composed of two overlapping shells made of silica. It serves several functions, including protection, support, and buoyancy, and plays a role in the ecology of these organisms.