A genomic and phylogenetic perspective on endosymbiosis and algal origin

Hwan Su Yoon, Jeremiah Hackett, Debashish Bhattacharya

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Accounting for the diversity of photosynthetic eukaryotes is an important challenge in microbial biology. It has now become clear that endosymbiosis explains the origin of the photosynthetic organelle (plastid) in different algal groups. The first plastid originated from a primary endosymbiosis, whereby a previously non-photosynthetic protist engulfed and enslaved a cyanobacterium. This alga then gave rise to the red, green, and glaucophyte lineages. Algae such as the chlorophyll c-containing chromists gained their plastid through secondary endosymbiosis, in which an existing eukaryotic alga (in this case, a rhodophyte) was engulfed. Another chlorophyll c-containing algal group, the dinoflagellates, is a member of the alveolates that is postulated to be sister to chromists. The plastid in these algae has followed a radically different path of evolution. The peridinin-containing dinoflagellates underwent an unprecedented level of plastid genome reduction with the ca. 16 remaining genes encoded on 1-3 gene minicircles. In this short review, we examine algal plastid diversity using phylogenetic and genomic methods and show endosymbiosis to be a major force in algal evolution. In particular, we focus on the evolution of targeting signals that facilitate the import of nuclear-encoded photosynthetic proteins into the plastid.

Original languageEnglish (US)
Pages (from-to)475-481
Number of pages7
JournalJournal of Applied Phycology
Volume18
Issue number3-5
DOIs
StatePublished - Oct 2006
Externally publishedYes

Fingerprint

algae
Plastids
Symbiosis
plastid
symbiosis
plastids
genomics
phylogenetics
phylogeny
Dinoflagellida
alga
Plastid Genomes
Chloroplast Proteins
dinoflagellate
Cell Nucleus Active Transport
chlorophyll
Cyanobacteria
Eukaryota
Organelles
Genes

Keywords

  • Algal evolution
  • Chromalveolates
  • Endosymbiosis
  • Gene transfer
  • Plastid

ASJC Scopus subject areas

  • Aquatic Science
  • Biotechnology

Cite this

A genomic and phylogenetic perspective on endosymbiosis and algal origin. / Yoon, Hwan Su; Hackett, Jeremiah; Bhattacharya, Debashish.

In: Journal of Applied Phycology, Vol. 18, No. 3-5, 10.2006, p. 475-481.

Research output: Contribution to journalArticle

Yoon, Hwan Su ; Hackett, Jeremiah ; Bhattacharya, Debashish. / A genomic and phylogenetic perspective on endosymbiosis and algal origin. In: Journal of Applied Phycology. 2006 ; Vol. 18, No. 3-5. pp. 475-481.
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