{{Short description|Fraction of cyanobacteria between 0.2 and 2 μm}} '''Picocyanobacteria''' are cyanobacteria that are part of the picoplankton, which is the fraction of plankton composed by cells between 0.2 and 2 μm.<ref>{{cite journal |vauthors=Trinh S, Haggoud A, Reysset G |title=Conjugal transfer of the 5-nitroimidazole resistance plasmid pIP417 from Bacteroides vulgatus BV-17: characterization and nucleotide sequence analysis of the mobilization region |journal=Journal of Bacteriology |volume=178 |issue=23 |pages=6671–6 |date=December 1996 |pmid=8955281 |doi=10.1128/jb.178.23.6671-6676.1996 |pmc=178560 }}</ref> Picocyanobacteria comprise the smallest photoautotrophs.<ref>{{cite journal |last1=Cabello-Yeves |first1=Pedro J. |last2=Callieri |first2=Cristiana |last3=Picazo |first3=Antonio |last4=Schallenberg |first4=Lena |last5=Huber |first5=Paula |last6=Roda-Garcia |first6=Juan J. |last7=Bartosiewicz |first7=Maciej |last8=Belykh |first8=Olga I. |last9=Tikhonova |first9=Irina V. |last10=Torcello-Requena |first10=Alberto |last11=De Prado |first11=Paula Martin |last12=Puxty |first12=Richard J. |last13=Millard |first13=Andrew D. |last14=Camacho |first14=Antonio |last15=Rodriguez-Valera |first15=Francisco |last16=Scanlan |first16=David J. |title=Elucidating the picocyanobacteria salinity divide through ecogenomics of new freshwater isolates |journal=BMC Biology |volume=20 |issue=1 |date=2022-08-08 |page=175 |issn=1741-7007 |pmid=35941649 |pmc=9361551 |doi=10.1186/s12915-022-01379-z |doi-access=free}}</ref>
==Genera== Freshwater picocyanobacteria genera include ''Synechococcus'', ''Cyanobium'', and ''Synechocystis'',<ref>{{cite book |last1=Jasser |first1=Iwona |last2=Callieri |first2=Cristiana |title=Handbook of Cyanobacterial Monitoring and Cyanotoxin Analysis |chapter=Picocyanobacteria: The Smallest Cell-Size Cyanobacteria |publisher=Wiley |date=2016-12-20 |isbn=978-1-119-06868-6 |doi=10.1002/9781119068761.ch3 |pages=19–27}}</ref> and marine picocyanobacteria genera are represented primarily by ''Synechococcus'' and ''Prochlorococcus''.<ref>{{cite journal |last1=Sánchez-Baracaldo |first1=Patricia |last2=Bianchini |first2=Giorgio |last3=Di Cesare |first3=Andrea |last4=Callieri |first4=Cristiana |last5=Chrismas |first5=Nathan A. M. |title=Insights Into the Evolution of Picocyanobacteria and Phycoerythrin Genes (mpeBA and cpeBA) |journal=Frontiers in Microbiology |volume=10 |date=2019-01-30 |page=45 |issn=1664-302X |pmid=30761097 |pmc=6363710 |doi=10.3389/fmicb.2019.00045 |doi-access=free}}</ref>
== See also == * Cyanobacteria * Picoplankton * Picoeukaryote * Picozoa * {{slink|Plankton|Size groups}}
== References == {{Reflist}}
==External links== {{Scholia}} *[https://www.youtube.com/watch?v=NOwbjOJjvjE How Ancient Microbes Rode Bug Bits Out to Sea] (PBS Eons)
{{Plankton}}
Category:Cyanobacteria Category:Biological oceanography Category:Planktology Category:Aquatic ecology
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