Cyanobacteria filament

Filamentous cyanobacteria are photosynthetic microorganisms that form thread-like colonies, among the oldest life forms on Earth.

About this subject

Filamentous cyanobacteria are prokaryotes that perform oxygenic photosynthesis, a process that transformed the early atmosphere billions of years ago. These microorganisms form filaments called trichomes, which can be straight or spiral-shaped, and are found in aquatic and terrestrial environments. Genera such as Anabaena and Nostoc are known for fixing atmospheric nitrogen in heterocysts, specialized cells that give them an advantage in nitrogen-poor habitats. In eutrophic water bodies, they can proliferate forming harmful algal blooms that produce toxins like microcystins, affecting human and animal health. These cyanobacteria are also studied for biofuel production and bioactive compounds. Fossils of cyanobacteria date back 3.5 billion years, making them crucial for understanding the origin of life.

Frequently Asked Questions

What are filamentous cyanobacteria?

They are photosynthetic bacteria forming chains of cells (filaments) and can fix nitrogen.

Where are they found?

In freshwater, saltwater, soil, and even in symbiosis with plants like water ferns.

What is their importance to humans?

They cause toxic blooms but also have biotechnological potential for biofuels and natural fertilizers.