Ascospores

Definition

Ascospores are specialized spores produced within an ascus, a sac-like structure, during the sexual reproduction of ascomycete fungi. They play a crucial role in the dissemination and genetic diversity of these fungi.

5 Must Know Facts For Your Next Test

1. Ascospores are produced through meiosis followed by mitosis within the ascus, typically resulting in eight spores per ascus.
2. Ascospores are characteristic of the phylum Ascomycota, also known as sac fungi.
3. The formation of ascospores is a key feature distinguishing ascomycetes from other fungal groups.
4. Ascospores can be forcibly ejected from the ascus to aid in dispersal through wind or water.
5. The structure and arrangement of ascospores within an ascus can be used to identify different species of ascomycete fungi.

Review Questions

• What is the primary function of ascospores in the life cycle of ascomycete fungi?
• How many ascospores are typically produced within one ascus?
• What distinguishes Ascomycota fungi from other fungal groups in terms of spore production?

Related terms

Ascus: A sac-like structure where meiosis and mitosis occur to produce ascospores.

Ascomycota:

A large phylum of fungi known for producing spores in asci.

Meiosis:

A type of cell division that reduces the chromosome number by half, leading to the production of four genetically diverse cells.