QS Study

Thousands of Algal species are found in this world. They have diversity in shape, size, and structure, but all of them contain different photosynthetic pigments and thus they are autotrophic.

A short description of Spirogyra, as a. representative of algae, is stated there.

Structure: They are green, unbranched filamentous algae. Their chloroplasts are band-shaped, spirally arranged in the cell. The name- Spirogyra comes from this spiral chloroplast.

There are pyrenoids in the chloroplasts. The vegetative cells are elongated and each cell contains a well-organized nucleus and a large vacuole. Their body is slippery and the cell wall is three-layered.

Fig: A portion of spirogyra

Reproduction: Sexual reproduction occurs by the process of conjugation. They also reproduce by fragmentations (Filament break up into short pieces and each part grew into a new filament or by spore formation.

Importance of Spirogyra: It is an important source of fish- food. It may .also be used for human food through special processing. It plays a great role in the natural food cycle.