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Genomic footprints of a cryptic plastid endosymbiosis in diatoms
Moustafa, A.; Beszteri, B.; Maier, U.G.; Bowler, C.; Valentin, K.; Bhattacharya, D. (2009). Genomic footprints of a cryptic plastid endosymbiosis in diatoms. Science (Wash.) 324(5935): 1724-1726. dx.doi.org/10.1126/science.1172983
In: Science (Washington). American Association for the Advancement of Science: New York, N.Y. ISSN 0036-8075, more
Peer reviewed article  

Available in  Authors 

Keywords
    Algae; Diatoms; Endosymbionts; Genomes; Protists; Species diversity; Marine

Authors  Top 
  • Moustafa, A.
  • Beszteri, B.
  • Maier, U.G.
  • Bowler, C.
  • Valentin, K.
  • Bhattacharya, D.

Abstract
    Diatoms and other chromalveolates are among the dominant phytoplankters in the world’s oceans. Endosymbiosis was essential to the success of chromalveolates, and it appears that the ancestral plastid in this group had a red algal origin via an ancient secondary endosymbiosis. However, recent analyses have turned up a handful of nuclear genes in chromalveolates that are of green algal derivation. Using a genome-wide approach to estimate the "green" contribution to diatoms, we identified >1700 green gene transfers, constituting 16% of the diatom nuclear coding potential. These genes were probably introduced into diatoms and other chromalveolates from a cryptic endosymbiont related to prasinophyte-like green algae. Chromalveolates appear to have recruited genes from the two major existing algal groups to forge a highly successful, species-rich protist lineage.

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