Editing Cyanobacteria (section)

==== Metabolism ====
In general, photosynthesis in cyanobacteria uses water as an [[Redox|electron donor]] and produces [[oxygen]] as a byproduct, though some may also use [[hydrogen sulfide]]<ref name="Cohen Y, Jørgensen BB, Revsbech NP, Poplawski R 19862">{{cite journal | vauthors = Cohen Y, Jørgensen BB, Revsbech NP, Poplawski R | title = Adaptation to Hydrogen Sulfide of Oxygenic and Anoxygenic Photosynthesis among Cyanobacteria | journal = Applied and Environmental Microbiology | volume = 51 | issue = 2 | pages = 398–407 | date = February 1986 | pmid = 16346996 | pmc = 238881 | doi = 10.1128/AEM.51.2.398-407.1986 | bibcode = 1986ApEnM..51..398C }}</ref> a process which occurs among other photosynthetic bacteria such as the [[purple sulfur bacteria]].

[[Carbon dioxide]] is reduced to form [[carbohydrate]]s via the [[Calvin cycle]].<ref>{{cite book |title=Molecular Mechanisms of Photosynthesis | vauthors = Blankenship RE |author1-link=Robert E. Blankenship |publisher=[[Wiley-Blackwell]] |year=2014 |isbn=978-1-4051-8975-0 |pages=147–73}}</ref> The large amounts of oxygen in the atmosphere are considered to have been first created by the activities of ancient cyanobacteria.<ref name="Och_2012">{{cite journal | vauthors = Och LM, Shields-Zhou GA |title=The Neoproterozoic oxygenation event: Environmental perturbations and biogeochemical cycling |journal=[[Earth-Science Reviews]] |volume=110 |issue=1–4 |pages=26–57 |doi=10.1016/j.earscirev.2011.09.004 |date=January 2012 |bibcode=2012ESRv..110...26O}}</ref> They are often found as [[symbiont]]s with a number of other groups of organisms such as fungi (lichens), [[coral]]s, [[pteridophyte]]s (''[[Azolla]]''), [[angiosperm]]s (''[[Gunnera]]''), etc.<ref>{{cite book | vauthors = Adams DG, Bergman B, Nierzwicki-Bauer SA, Duggan PS, Rai AN, Schüßler A | chapter = Cyanobacterial-Plant Symbioses | veditors = Rosenberg E, DeLong EF, Lory S, Stackebrandt E, Thompson F |title=The Prokaryotes  |date=2013 |publisher=Springer, Berlin, Heidelberg |isbn=978-3-642-30193-3 |pages=359–400 |doi=10.1007/978-3-642-30194-0_17}}</ref> The carbon metabolism of cyanobacteria include the incomplete [[Citric acid cycle|Krebs cycle]],<ref>{{cite journal | vauthors = Zhang S, Bryant DA | title = The tricarboxylic acid cycle in cyanobacteria | journal = Science | volume = 334 | issue = 6062 | pages = 1551–1553 | date = December 2011 | pmid = 22174252 | doi = 10.1126/science.1210858 | bibcode = 2011Sci...334.1551Z }}</ref> the [[pentose phosphate pathway]], and [[glycolysis]].<ref>{{cite journal | vauthors = Xiong W, Lee TC, Rommelfanger S, Gjersing E, Cano M, Maness PC, Ghirardi M, Yu J | display-authors = 6 | title = Phosphoketolase pathway contributes to carbon metabolism in cyanobacteria | journal = Nature Plants | volume = 2 | issue = 1 | pages = 15187 | date = December 2015 | pmid = 27250745 | doi = 10.1038/nplants.2015.187 }}</ref>

There are some groups capable of [[heterotrophic]] growth,<ref name="CarrWhitton1973">{{cite book | vauthors = Smith A |chapter=Synthesis of metabolic intermediates | veditors =  Carr NG, Whitton BA |title=The Biology of Blue-green Algae|chapter-url={{google books |plainurl=y |id=fSRPg-D0Jk0C |page=30}} |year=1973 |publisher=University of California Press |isbn=978-0-520-02344-4 |pages=[https://archive.org/details/biologyofbluegre0000carr/page/30 30–] |url=https://archive.org/details/biologyofbluegre0000carr}}</ref> while others are [[parasitic]], causing diseases in invertebrates or algae (e.g., the [[black band disease]]).<ref>{{cite journal | vauthors = Jangoux M |year=1987 |title=Diseases of Echinodermata. I. Agents microorganisms and protistans |journal=Diseases of Aquatic Organisms |volume=2 |pages=147–62 |doi=10.3354/dao002147 |doi-access=free}}</ref><ref>{{cite book |veditors=Kinne O |year=1980 |title=Diseases of Marine Animals |volume=1 |url=https://www.int-res.com/archive/doma_books/DOMA_Vol_I_(general_aspects,_protozoa_to%20gastropoda).pdf |publisher=John Wiley & Sons |location=Chichester, UK |isbn=978-0-471-99584-5}}</ref><ref>{{cite journal | vauthors = Kristiansen A |doi=10.2216/i0031-8884-4-1-19.1 |title=''Sarcinastrum urosporae'', a Colourless Parasitic Blue-green Alga |journal=Phycologia |year=1964 |volume=4 |issue=1 |pages=19–22 |bibcode=1964Phyco...4...19K }}</ref>
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