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''Synechocystis'' is a genus of
unicellular A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Organisms fall into two general categories: prokaryotic organisms and ...
, freshwater
cyanobacteria Cyanobacteria (), also known as Cyanophyta, are a phylum of gram-negative bacteria that obtain energy via photosynthesis. The name ''cyanobacteria'' refers to their color (), which similarly forms the basis of cyanobacteria's common name, blue ...
in the family Merismopediaceae. It includes a strain, ''Synechocystis'' sp. PCC 6803, which is a well studied
model organism A model organism (often shortened to model) is a non-human species that is extensively studied to understand particular biological phenomena, with the expectation that discoveries made in the model organism will provide insight into the working ...
. Like all cyanobacteria, ''Synechocystis'' branches on the evolutionary tree from its ancestral root, '' Gloeobacter violaceus''. ''Synechocystis'' is not diazotrophic, and is closely related to another model organism, ''
Cyanothece ''Cyanothece'' is a genus of unicellular, diazotrophic, oxygenic photosynthesizing cyanobacteria. Modern organisms and cellular organization In 1976, Jiří Komárek defined the prokaryotic cyanobacteria genus ''Cyanothece'' as distinct from '' ...
'' ATCC 51442. It has been suggested that originally ''Synechocystis'' possessed the ability to fix atmospheric nitrogen, but lost the genes required for the process.


See also

* ''Synechocystis'' run-and-tumble


References

{{Taxonbar, from=Q7662346 Cyanobacteria genera Synechococcales Bacteria genera