Editing Photosynthesis (section)

===Photosynthetic eukaryotic lineages===
Symbiotic and [[Kleptoplasty|kleptoplastic]] organisms excluded:

*The [[glaucophyte]]s and the [[Red algae|red]] and [[Viridiplantae|green algae]]—clade [[Archaeplastida]] ([[Unicellular organism|uni]]- and [[Multicellular organism|multicellular]])
*The [[Cryptophyceae|cryptophytes]]—clade [[Cryptista]] (unicellular)
*The [[haptophyte]]s—clade [[Haptista]] (unicellular)
*The [[dinoflagellate]]s and [[Chromerida|chromerids]] in the superphylum [[Myzozoa]], and [[Pseudoblepharisma]] in the phylum [[Ciliate|Ciliophora]]—clade [[Alveolata]] (unicellular)
*The [[Ochrophyta|ochrophytes]]—clade [[Stramenopile|Stramenopila]] (uni- and multicellular)
*The [[chlorarachniophyte]]s and three [[species]] of [[Paulinella]] in the phylum [[Cercozoa]]—clade [[Rhizaria]] (unicellular)
*The [[euglenid]]s—clade [[Excavata]] (unicellular)

Except for the euglenids, which are found within the [[Excavata]], all of these belong to the [[Diaphoretickes]]. Archaeplastida and the photosynthetic Paulinella got their plastids, which are surrounded by two membranes, through primary [[Endosymbiont|endosymbiosis]] in two separate events, by engulfing a cyanobacterium. The plastids in all the other groups have either a red or green algal origin, and are referred to as the "red lineages" and the "green lineages". The only known exception is the ciliate [[Pseudoblepharisma|Pseudoblepharisma tenue]], which in addition to its plastids that originated from green algae also has a [[purple sulfur bacteria|purple sulfur bacterium]] as symbiont. In dinoflagellates and euglenids the plastids are surrounded by three membranes, and in the remaining lines by four. A [[nucleomorph]], remnants of the original algal nucleus located between the inner and outer membranes of the plastid, is present in the cryptophytes (from a red alga) and chlorarachniophytes (from a green alga).<ref>{{cite journal |vauthors= Keeling PJ |date= March 2010 |title= The endosymbiotic origin, diversification and fate of plastids |journal= Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences |volume= 365 |issue= 1541 |pages= 729–748 |doi= 10.1098/rstb.2009.0103 |pmc= 2817223 |pmid= 20124341 }}</ref>
Some dinoflagellates that lost their photosynthetic ability later regained it again through new endosymbiotic events with different algae.
While able to perform photosynthesis, many of these eukaryotic groups are [[mixotroph]]s and practice [[heterotroph]]y to various degrees.