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The plastid ancestor originated among one of the major cyanobacterial lineages

Author

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  • Jesús A. G. Ochoa de Alda

    (Grupo Hortofruenol, INTAEX-CICYTEX
    School of Biology, IE University
    Present address: Didáctica de las Ciencias y las Matemáticas, Fac. Formación de Profesorado, Universidad de Extremadura, Avenida de la Universidad s/n, 10003 Cáceres, Spain)

  • Rocío Esteban

    (School of Biology, IE University
    Present address: Grupo Deprofe, Didáctica de las Ciencias y las Matemáticas, Fac. de Educación, Universidad de Extremadura, Avenida de Elvas s/n, 06071 Badajoz, Spain)

  • María Luz Diago

    (School of Biology, IE University
    Present address: Universidad Internacional de La Rioja, Rey Juan Carlos I, 41, 26002 Logroño, Spain (M.L.D.))

  • Jean Houmard

Abstract

The primary endosymbiotic origin of chloroplasts is now well established but the identification of the present cyanobacteria most closely related to the plastid ancestor remains debated. We analyse the evolutionary trajectory of a subset of highly conserved cyanobacterial proteins (core) along the plastid lineage, those which were not lost after the endosymbiosis. We concatenate the sequences of 33 cyanobacterial core proteins that share a congruent evolutionary history, with their eukaryotic counterparts to reconstruct their phylogeny using sophisticated evolutionary models. We perform an independent reconstruction using concatenated 16S and 23S rRNA sequences. These complementary approaches converge to a plastid origin occurring during the divergence of one of the major cyanobacterial lineages that include N2-fixing filamentous cyanobacteria and species able to differentiate heterocysts.

Suggested Citation

  • Jesús A. G. Ochoa de Alda & Rocío Esteban & María Luz Diago & Jean Houmard, 2014. "The plastid ancestor originated among one of the major cyanobacterial lineages," Nature Communications, Nature, vol. 5(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms5937
    DOI: 10.1038/ncomms5937
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    Cited by:

    1. Sonia E. Evans & Anya E. Franks & Matthew E. Bergman & Nasha S. Sethna & Mark A. Currie & Michael A. Phillips, 2024. "Plastid ancestors lacked a complete Entner-Doudoroff pathway, limiting plants to glycolysis and the pentose phosphate pathway," Nature Communications, Nature, vol. 15(1), pages 1-13, December.

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