*Microcystis aeruginosa*is a cyanobacteria that is typically found in freshwater

*Microcystis aeruginosa*

Cyanobacteria are highly adaptable photosynthetic bacteria that can thrive in a wide range of environments, including marine and freshwater habitats, soil, and rocks.

Cyanobacteria Adaptability and Habitats

Cyanobacteria exhibit diverse cellular organization; they can live as single cells (unicellular), group together in colonies, or grow as multicellular filaments that form sheaths or biofilms.

Cyanobacteria Cellular Forms

Many cyanobacterial species can fix nitrogen, converting molecular nitrogen into nitrites and nitrates that other bacteria, plants, and animals can utilize.

Cyanobacterial Nitrogen Fixation

Cyanobacteria are a phylum of blue-green phototrophic bacteria that contain chlorophyll and perform oxygenic photosynthesis. They are hypothesized to have played a critical role in oxygenating Earth's anoxic atmosphere approximately $${}1$$–$${}2$$ billion years ago.

Google

University of Wisconsin - Madison

Phototrophic bacteria represent a diverse category of bacteria, rather than a single taxonomic group, characterized by their ability to use sunlight as an energy source. They include both Proteobacteria and nonproteobacteria, as well as purple or green sulfur and nonsulfur bacteria, with some species being capable of nitrogen fixation.

Phototrophic Bacteria

https://openstax.org/details/books/microbiology/

Microbiology covers the scope and sequence requirements for a single-semester microbiology course for non-majors. The book presents the core concepts of microbiology with a focus on applications for careers in allied health. The pedagogical features of the text make the material interesting and accessible while maintaining the career-application focus and scientific rigor inherent in the subject matter. Microbiology’s art program enhances students’ understanding of concepts through clear and effective illustrations, diagrams, and photographs.

Microbiology is produced through a collaborative publishing agreement between OpenStax and the American Society for Microbiology Press. The book aligns with the curriculum guidelines of the American Society for Microbiology.

OpenStax Microbiology Textbook

Cyanobacteria

Purple and green bacteria are a group of phototrophic bacteria that carry out photosynthesis using bacteriochlorophylls, which are green, purple, or blue pigments similar to plant chlorophyll. Some of these bacteria also contain carotenoids—red or orange pigments—enabling them to absorb light at different wavelengths and display colors ranging from orange and red to purple and green.

Purple and Green Bacteria 

Phototrophic bacteria perform either oxygenic photosynthesis, which produces oxygen, or anoxygenic photosynthesis, which does not generate oxygen. Except for certain cyanobacteria, most phototrophic bacteria engage in anoxygenic photosynthesis.

Learn Before

Related

Learn After