Evolution of photosynthetic prokaryotes: A maximum-likelihood mapping approach

Jason Raymond, Olga Zhaxybayeva, J. Peter Gogarten, Robert E. Blankenship

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Reconstructing the early evolution of photosynthesis has been guided in part by the geological record, but the complexity and great antiquity of these early events require molecular genetic techniques as the primary tools of inference. Recent genome sequencing efforts have made whole genome data available from representatives of each of the five phyla of bacteria with photosynthetic members, allowing extensive phylogenetic comparisons of these organisms. Here, we have undertaken whole genome comparisons using maximum likelihood to compare 527 unique sets of orthologous genes from all five photosynthetic phyla. Substantiating recent whole genome analyses of other prokaryotes, our results indicate that horizontal gene transfer (HGT) has played a significant part in the evolution of these organisms, resulting in genomes with mosaic evolutionary histories. A small plurality phylogenetic signal was observed, which may be a core of remnant genes not subject to HGT, or may result from a propensity for gene exchange between two or more of the photosynthetic organisms compared.

Original languageEnglish (US)
Pages (from-to)223-230
Number of pages8
JournalPhilosophical Transactions of the Royal Society B: Biological Sciences
Issue number1429
StatePublished - Jan 29 2003


  • Evolution
  • Photosynthetic bacteria
  • Whole genome comparison

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Agricultural and Biological Sciences(all)


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