Photosynthetic Bacteria – What Are Bacteria?

Chemotrophic growth for the purple non-sulfur bacteria is achieved by respiration, although there are some exceptional strains and species which can obtain energy by fermentation or anaerobic respiration.

Electron flow in purple sulfer bacteria - Duration: 18:51

Purple sulphur bacteria can use elemental sulphur and also sulphide (e.g.

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Photosynthetic organisms contain organelles called plastids in their cytoplasm. According to Cheong Xin Chan and Debashish Bhattacharya of Rutgers University (), the double-membraned plastids in plants and algae are referred to as primary plastids, while the multiple-membraned variety found in plankton are called secondary plastids. These organelles generally contain pigments or can store nutrients. In “” (Sinauer Associates, 2000), Geoffrey Cooper enumerates the various plastids found in plants. Colorless and non-pigmented leucoplasts store fats and starch, while chromoplasts contain carotenoids and chloroplasts contain chlorophyll.


is an older approach to the phylogenetic grouping of the photosynthetic bacteria. The following of photosynthetic bacteria appeared in the Bacteriology 102 lab manual prior to the 2nd printing of the 2nd edition in the mid-1990s (General Microbiology: A Laboratory Manual by J. A. Lindquist (ed.), McGraw-Hill/Primis Custom Publishing – retired at its edition). The anoxygenic and oxygenic groupings correspond to Sections 18 and 19, respectively, of Bergey's Manual of Systematic Bacteriology (First Ed., Vol. 3, 1989).

Contrast this with purple sulphur bacteria which are obligate phototrophs.

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Advances have also been made in the field of artificial photosynthesis. A group of researchers recently developed an to capture carbon dioxide using nanotechnology (nanowires). This feeds into a system of microbes that reduce the carbon dioxide into fuels or polymers by using energy from sunlight.

Photosynthesis - definition of photosynthesis by The …

Of the several we have used in teaching and research over the decades, the medium detailed below has probably given us the best luck in obtaining rapid and substantial growth (enrichments and colonies) of purple non-sulfur photosynthetic bacteria. It is probably based on a medium formulated originally by who was a distinguished and well-remembered visitor to our department.

Pfennig N (1967) Photosynthetic bacteria. Annual Review of Microbiology 21: 285–324.

Origin of Microbial Life and Photosynthesis

Fenna RE, Matthews BW, Olson JM and EKShaw (1974) Structure of a bacteriochlorophyll‐protein from the green photosynthetic bacterium Chlorobium limicola: crystallographic evidence for a trimer. Journal of Molecular Biology 84: 231–240.

Photosynthetic bacteria are a group of bacteria that contain light absorbing pigments..

MONERA | Bacteria | Photosynthesis

In the epilmnion, photosynthetic bacteria, such as the cyanobacteria, may contribute significantly to
primary productivity (the fixation of carbon dioxide into organic carbon, in this case by photosynthesis requiring light).

Cyanobacteria, purple, green sulphur, green gliding bacteria and heliobacteria

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We also do a test that is somewhat similar in its setup (but not so much in theory) to the which utilizes Thioglycollate Medium. In Thioglycollate Medium, it is important to recall that is due only to fermentation. However, in the particular test considered here for the purple non-sulfur photosynthetic bacteria, anaerobic growth is only associated with anoxygenic phototrophy, and the categories associated with the standard oxygen relationship test (strict aerobe, facultative anaerobe, etc.) do not apply.