Red and green algal monophyly and extensive gene sharing found in a rich repertoire of red algal genes

Cheong Xin Chan, Eun Chan Yang, Titas Banerjee, Hwan Su Yoon, Patrick T. Martone, José M. Estevez, Debashish Bhattacharya

Research output: Contribution to journalArticlepeer-review

78 Citations (Scopus)

Abstract

The Plantae comprising red, green (including land plants), and glaucophyte algae are postulated to have a single common ancestor that is the founding lineage of photosynthetic eukaryotes [1, 2]. However, recent multiprotein phylogenies provide little [3, 4] or no [5, 6] support for this hypothesis. This may reflect limited complete genome data available for red algae, currently only the highly reduced genome of Cyanidioschyzon merolae [7], a reticulate gene ancestry [5], or variable gene divergence rates that mislead phylogenetic inference [8]. Here, using novel genome data from the mesophilic Porphyridium cruentum and Calliarthron tuberculosum, we analyze 60,000 novel red algal genes to test the monophyly of red + green (RG) algae and their extent of gene sharing with other lineages. Using a gene-by-gene approach, we find an emerging signal of RG monophyly (supported by ∼50% of the examined protein phylogenies) that increases with the number of distinct phyla and terminal taxa in the analysis. A total of 1,808 phylogenies show evidence of gene sharing between Plantae and other lineages. We demonstrate that a rich mesophilic red algal gene repertoire is crucial for testing controversial issues in eukaryote evolution and for understanding the complex patterns of gene inheritance in protists.

Original languageEnglish
Pages (from-to)328-333
Number of pages6
JournalCurrent Biology
Volume21
Issue number4
DOIs
Publication statusPublished - 22 Feb 2011
Externally publishedYes

ASJC Scopus subject areas

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

Fingerprint

Dive into the research topics of 'Red and green algal monophyly and extensive gene sharing found in a rich repertoire of red algal genes'. Together they form a unique fingerprint.

Cite this