Thallus

Definition

Thallus is the vegetative body of fungi, algae, and some non-vascular plants. It lacks true roots, stems, and leaves.

5 Must Know Facts For Your Next Test

1. The thallus is a major structural feature of fungi and can be unicellular or multicellular.
2. In multicellular fungi, the thallus is composed of hyphae that form a mycelium network.
3. The thallus plays a crucial role in nutrient absorption and reproduction in fungi.
4. Fungal thalli can vary greatly in size and shape depending on the species.
5. Yeasts exhibit a unicellular thallus while molds generally have a filamentous thallus.

Review Questions

• What are the primary components of a multicellular fungal thallus?
• How does the structure of a yeast's thallus differ from that of mold?
• Describe the role of the thallus in fungal nutrient absorption.

Related terms

Hyphae:

Thread-like structures that make up the mycelium of a fungus.

Mycelium:

A network of hyphae that forms the main growing structure of a fungus.

Sporangium: A structure where spores are produced in fungi.