Stramenopiles

Definition

Stramenopiles are a diverse group of eukaryotic microorganisms that include algae, diatoms, and water molds. They are characterized by the presence of two distinct flagella, one of which is covered with hair-like projections.

5 Must Know Facts For Your Next Test

1. Stramenopiles include significant photosynthetic organisms like diatoms and brown algae.
2. They possess two unequal flagella; one is smooth while the other has tubular hairs called mastigonemes.
3. Diatoms, a subgroup of stramenopiles, have cell walls made of silica which form intricate patterns.
4. Some stramenopiles like oomycetes are important plant pathogens causing diseases such as potato blight.
5. Brown algae, another subgroup, contribute to marine ecosystems as major sources of food and habitat.

Review Questions

Related terms

Diatoms:

A group of algae within stramenopiles known for their silica-based cell walls.

Oomycetes: Water molds within stramenopiles that include some plant pathogens.

Brown Algae: Multicellular marine algae within stramenopiles that provide food and habitat in ocean environments.