Monophyly of Primary Photosynthetic Eukaryotes: Green Plants, Red Algae, and Glaucophytes

Between 1 and 1.5 billion years ago [ 1, 2], eukaryotic organisms acquired the ability to convert light into chemical energy through endosymbiosis with a Cyanobacterium (e.g., [ 3–5]). This event gave rise to “primary” plastids, which are present in green plants, red algae, and glaucophytes (“Planta...

Full description

Saved in:
Bibliographic Details
Published in:Current biology 2005-07, Vol.15 (14), p.1325-1330
Main Authors: Rodríguez-Ezpeleta, Naiara, Brinkmann, Henner, Burey, Suzanne C., Roure, Béatrice, Burger, Gertraud, Löffelhardt, Wolfgang, Bohnert, Hans J., Philippe, Hervé, Lang, B. Franz
Format: Article
Language:English
Subjects:
Bayes Theorem
Chlorophyta - genetics
Cluster Analysis
Computational Biology
Cyanobacteria - genetics
Cyanophora - genetics
DNA, Complementary - genetics
Evolution, Molecular
Likelihood Functions
Models, Genetic
Phylogeny
Plants - genetics
Plastids - genetics
Rhodophyta - genetics
Sequence Analysis, DNA
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Between 1 and 1.5 billion years ago [ 1, 2], eukaryotic organisms acquired the ability to convert light into chemical energy through endosymbiosis with a Cyanobacterium (e.g., [ 3–5]). This event gave rise to “primary” plastids, which are present in green plants, red algae, and glaucophytes (“Plantae” sensu Cavalier-Smith [ 6]). The widely accepted view that primary plastids arose only once [ 5] 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., [ 7–12]). 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 [ 13]), further testing of the monophyly of Plantae should include representatives from eukaryotic lineages for which currently insufficient sequence information is available.
ISSN:0960-9822
1879-0445
DOI:10.1016/j.cub.2005.06.040