Gray M W
Trends Genet. 1989 Sep;5(9):294-9. doi: 10.1016/0168-9525(89)90111-x.
Analysis of organellar genomes strongly supports the idea that chloroplasts and mitochondria originated in evolution as eubacteria-like endosymbionts, whose closest contemporaries are cyanobacteria and purple photosynthetic bacteria, respectively. However, there is still much debate about whether a single endosymbiotic event or multiple ones gave rise to each organelle in different eukaryotes, and considerable uncertainty about what has happened to the genomes of chloroplasts and mitochondria since their appearance in the eukaryotic cell.
对细胞器基因组的分析有力地支持了这样一种观点，即叶绿体和线粒体在进化过程中起源于类似真细菌的内共生体，它们现存关系最近的同类分别是蓝细菌和紫色光合细菌。然而，关于在不同真核生物中单个内共生事件还是多个内共生事件导致了每个细胞器的形成，仍存在很多争议，并且自叶绿体和线粒体出现在真核细胞中以来，它们的基因组发生了什么也存在相当大的不确定性。
