- Plants: Cellulose is the primary component of plant cell walls, providing structural support and rigidity to the plant. It is found in all plants, including trees, shrubs, grasses, and flowering plants.
- Algae: Some species of algae, such as green algae and red algae, contain cellulose in their cell walls.
- Bacteria: Certain bacterial species, such as the Gram-negative bacteria Gluconacetobacter xylinus, produce cellulose as an extracellular matrix material.
- Fungi: Some fungal species, like the water mold Achlya, have cell walls made of cellulose and chitin.
- Animals: Cellulose can also be found in the exoskeletons of certain animals, such as insects, crustaceans, and arachnids. Although cellulose is not produced by animals, they acquire it through their diet or by using it as a building material.
- Oomycetes: Oomycetes, which are fungus-like organisms, have cellulose in their cell walls.
- Protists: Some protists, like the cellulose-producing green algae Micrasterias, contain cellulose in their cell walls.
- Slime molds: Slime molds, a group of organisms that can exhibit both plant and animal-like characteristics, can produce cellulose during their life cycle.
