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Monophyly of primary photosynthetic eukaryotes: green plants, red algae, and glaucophytes

Lookup NU author(s): Dr Naiara Rodriguez-Ezpeleta

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Abstract

Between 1 and 1.5 billion years ago, eukaryotic organisms acquired the ability to convert light into chemical energy through endosymbiosis with a Cyanobacterium (e.g.,). This event gave rise to "primary" plastids, which are present in green plants, red algae, and glaucophytes ("Plantae" sensu Cavalier-Smith). The widely accepted view that primary plastids arose only once implies two predictions: (1) all plastids form a monophyletic group, as do (2) primary photosynthetic eukaryotes. Nonetheless, unequivocal support for both predictions is lacking (e.g.,). In this report, we present two phylogenomic analyses, with 50 genes from 16 plastid and 15 cyanobacterial genomes and with 143 nuclear genes from 34 eukaryotic species, respectively. The nuclear dataset includes new sequences from glaucophytes, the less-studied group of primary photosynthetic eukaryotes. We find significant support for both predictions. Taken together, our analyses provide the first strong support for a single endosymbiotic event that gave rise to primary photosynthetic eukaryotes, the Plantae. Because our dataset does not cover the entire eukaryotic diversity (but only four of six major groups in), further testing of the monophyly of Plantae should include representatives from eukaryotic lineages for which currently insufficient sequence information is available.


Publication metadata

Author(s): Rodriguez-Ezpeleta N, Brinkmann H, Burey SC, Roure B, Burger G, Loeffelhardt W, Bohnert HJ, Philippe H, Lang BF

Publication type: Article

Publication status: Published

Journal: Current Biology

Year: 2005

Volume: 15

Issue: 14

Pages: 1325-1330

ISSN (print): 0960-9822

ISSN (electronic): 1879-0445

Publisher: Cell Press

URL: http://dx.doi.org/10.1016/j.cub.2005.06.040

DOI: 10.1016/j.cub.2005.06.040


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